'C' / 'S' scroll sgrôl 'C' / 'S' 'C' / 'S' scrolls sgrôl 'C' / 'S' 'E' alloy aloi 'E' 'F' hole seindwll 'F' holes seindwll 'blue' notes nodau 'blue' 2,4-dichlorophenoxyacetic acid asid 2,4-dicloroffenocsiasetig 2,4-dichlorophenoxyacetic acids asid 2,4-dicloroffenocsiasetig 3 plywood pren tair haen 3 plywoods pren tair haen A level Safon Uwch A levels Safon Uwch A line skirt sgert linell A A line skirts sgert linell A A major A fwyaf A majors A fwyaf A minor A leiaf A minors A leiaf AB produced AB wedi ei estyn AB produceds AB wedi ei estyn AB styrene styren AB AB styrenes styren AB AD OC (Anno Domini) AF AFF (across the flats of hexagonal nut) ALGOL ALGOL AS level Safon Uwch Atodol AS levels Safon Uwch Atodol ASCII code cod ASCII ASCII codes cod ASCII Aaronic Blessing Bendith Aaron Abelian group grŵp Abel Abelian groups grŵp Abel Abendlied Abendlied Abjuration Oath Llw Ymwadiad Abolition of Slavery Act Deddf Dileu Caethwasiaeth Abra file ffeil Abra Abra files ffeil Abra Abra frame ffrâm Abra Abra frames ffrâm Abra Access to Justice Act Deddf Mynediad i Gyfiawnder Accredited Training Organization Cyfundrefn Hyfforddi Gydnabyddedig (ATO) Accumulated Information Field Maes Gwybodaeth Gronedig (AIF) Acquired Immune Deficiency Syndrome Syndrom Diffyg Imiwnedd Caffaeledig (AIDS) Acrilan Acrilan Act Against Pluralities Deddf yn Erbyn Amlblwyfiaeth Act for the Propagation of the Gospel Deddf Taenu'r Efengyl Act in Absolute Restraint of Annates Deddf i Lwyr Atal Anodau Act in Conditional Restraint of Annates Deddf Amodol Atal Anodau Act of Annates Deddf Anodau Act of Appeals Deddf Apeliadau Act of Attainder Deddf Adendro Act of Dispensations Deddf Trwyddedau Act of Revocation Deddf Dirymiad Act of Settlement Deddf Ardrefnu Act of Six Articles Deddf y Chwe Erthygl Act of Submission of the Clergy Deddf Ymostyngiad y Clerigwyr Act of Supremacy Deddf Goruchafiaeth Act of Treasons Deddf Brad Act of Uniformity Deddf Unffurfiaeth Act of Union Deddf Uno Adam Adda Adam of Usk Adda o Frynbuga Addled Parliament Senedd Glwc (1614) Adi Granth Adi Granth Admiralty Morlys Admiralty brass pres Morlys Admiralty gunmetal gwnfetel Morlys Admiralty gunmetals gwnfetel Morlys Admonition to the Parliament Cerydd i'r Senedd Adoption Act Deddf Mabwysiadu Adullamites Adulamiaid Advertising Standards Authority Awdurdod Safonau Hysbysebu Advisory Committee for Wales Pwyllgor Ymgynghorol Cymru Aeolian mode modd Aeolaidd Aeolian modes modd Aeolaidd African drumming music cerddoriaeth ddrymio Affricanaidd African drumming musics cerddoriaeth ddrymio Affricanaidd African empire ymerodraeth Affrica African empires ymerodraeth Affrica Age Concern Cyngor yr Henoed Age of Austerity Oes y Llymder Age of Enlightenment Oes y Goleuo Age of Faith Oes Ffydd Age of Improvement Oes Cynnydd Age of Reason Oes Rheswm Age of the Saints Oes y Saint Agreement of the People Cydsyniad y Bobl Agricultural Adjustments Act Deddf Cymhwyso Amaethyddiaeth Agricultural Revolution Chwyldro Amaethyddol Alberti bass bas Alberti Albigensian Albigensaidd Albigensian Albigensiad Albigensian Crusade Croesgad yn erbyn yr Albigensiaid Albumblatt Albumblatt Aldine Press Gwasg Aldus Manutius Alexander the Great Alecsander Fawr Alexandrine Alecsandraidd Alfred the Great Alffred Fawr Aliens Act Deddf Estroniaid All Wales Strategy Strategaeth Cymru Gyfan (AWS) Allah Allah Allen key allwedd Allen Allen screw sgriw Allen Allen screws sgriw Allen Alliance Control Commission Comisiwn Rheoli'r Gynghrair Alliance for Progress Cynghrair er Cynnydd Alps Alpau Ambrose Emrys Ambrosian chant siant Ambrosaidd Ambrosian chants siant Ambrosaidd American Revolution Chwyldro Americanaidd American organ organ Americanaidd American organs organ Americanaidd Amnesty International Amnest Rhyngwladol Amrit-dhari Amrit-dhari Amrit-dharis Amrit-dhari Amrit-sanskar Amrit-sanskar Amrit-sanskars Amrit-sanskar Anabaptist Ailfedyddiwr Anarchist Party Plaid Anarchaidd Ancient Britons Hen Frythoniaid Ancient Egypt Hen Aifft Ancient Greece Hen Roeg Ancient of Days Hen Ddihenydd Angevin Angefin Anglican Anglican Anglican Anglicanaidd Anglican chant siant Anglicanaidd Anglican chants siant Anglicanaidd Anglicanism Anglicaniaeth Anglicization Seisnigo (of language, society) Anglicized Seisnigaidd Anglo-Irish Treaty Cytundeb Eingl-Wyddelig Anglo-Norman Eingl-Norman Anglo-Norman Eingl-Normanaidd Anglo-Norman Law Cyfraith Eingl-Normanaidd Anglo-Saxon Eingl-Sacsonaidd Anglo-Saxon Eingl-Sacsoneg (language) Anglo-Saxon Chronicles Croniclau'r Eingl-Sacsoniaid Anglo-Saxon Law Cyfraith Eingl-Sacsonaidd Anno Domini Oed Crist (AD) Ansoff Matrix Matrics Ansoff Antarctic Antartig Anti-Corn Law League Cynghrair er Diddymu'r Deddfau Ŷd Anti-Marcionite Prologues Prologau Gwrth-Farcionaidd Antichrist Anghrist Antiochene Antiochaidd Apostolic Fathers Tadau Apostolaidd Apostolic Succession Olyniaeth Apostolaidd Appelate Jurisdiction Act Deddf Awdurdod Apeliadol Appellant Lords Arglwyddi Apelyddol Arab League Cynghrair Arabaidd Arabic gum gwm Arabig Arabic gums gwm Arabig Aramaic Aramaeg (of language) Aramaic Arameaidd Aramaism Aramaegeb Archimedean drill dril Archimedes Archimedean drills dril Archimedes Archimedean spiral sbiral Archimedes Archimedean spirals sbiral Archimedes Arctic Arctig Argand diagram diagram Argand Argand diagrams diagram Argand Argentine Archentaidd Argentine Archentwr Arkansas oilstone carreg hogi Arkansas Arkansas oilstones carreg hogi Arkansas Arminian Arminaidd Arminian Arminiad Arminianism Arminiaeth Army High Command Pen Reolaeth y Fyddin Arnulph Arnwlff Art Nouveau Art Nouveau Arthurian legend chwedl Arthuraidd Arthurian legends chwedl Arthuraidd Artisans' Dwelling Act Deddf Anheddau'r Gweithwyr Aryan Ariad Aryan Ariaidd Aryan Race Hil Ariaidd Ascension Thursday Dydd Iau Dyrchafael Ascetic Theology Diwinyddiaeth Asgetig Ash Wednesday Dydd Mercher Lludw Asharite Asharitiad Assisi embroidery brodwaith Assisi Atlantic Charter Siarter yr Iwerydd Atlantic coast arfordir yr Iwerydd Atlantic coasts arfordir yr Iwerydd Atlantic roller gwaneg Iwerydd Atlantic rollers gwaneg Iwerydd Attorney-General Twrnai Cyffredinol Audience Court Cwrt Gwrandawiad Augmentations Court Cwrt yr Ychwanegiadau Augustinian Awstinaidd Augustinian Awstiniad Augustinian Canons Canoniaid Awstinaidd Augustinian Friars Brodyr Sant Awstin Augustinian Order Urdd Sant Awstin Augustinian theodicy theodiciaeth Awstin Augustinianism Awstiniaeth Auld Alliance Hen Gynghrair Aurora Australis Goleuni'r De Aurora Borealis Goleuni'r Gogledd Austria Awstria Austro-Piedmontese war rhyfel Awstria a Piedmont Austro-Piedmontese wars rhyfel Awstria a Piedmont Austro-Prussian war rhyfel Awstria a Phrwsia Austro-Prussian wars rhyfel Awstria a Phrwsia Avignon Papacy Pabaeth Avignon Axis Powers Pwerau'r Axis Azores high gwasgedd uchel Azores Azores highs gwasgedd uchel Azores Aztec Astec Aztec Astecaidd B major B fwyaf B majors B fwyaf B minor B leiaf B minors B leiaf B.S. recommendation argymhelliad B.S. B.S. recommendations argymhelliad B.S. BASIC BASIC BC CC (Before Christ) Backus-Naur form ffurf Backus-Naur Backus-Naur forms ffurf Backus-Naur Baisakhi / Vaisakhi Baisakhi / Vaisakhi Bakelite Bakelite Baker's fluid hylif Baker Baker's fluids hylif Baker Bakewell tart tarten Bakewell Bakewell tarts tarten Bakewell Balkan countries gwledydd y Balcan Balkans Balcanau, y Bank Charter Act Deddf Siarter y Banc Bank of England Banc Lloegr Bank of Scotland Banc yr Alban Baptist Bedyddiwr Barrowist dilynwr Barrow Bartholomew Bartholomeus Basal Metabolic Rate Cyfradd Metabolaeth Waelodol (BMR) Batesian mimicry dynwarediad Batesaidd Battle of Britain Brwydr Prydain Battle of the Somme Brwydr y Somme Bauhaus designer dylunydd Bauhaus Bauhaus designers dylunydd Bauhaus Bavarian Bafaraidd Bavarian Bafariad Bayeux Tapestry Tapestri Bayeux Beaufort Scale Graddfa Beaufort Bebung Bebung Bedivere Bedwyr Bedouin Bedwin Before Christ Cyn Crist (BC) Before Present Cyn y Presennol (BP) Beguine Lleian Le Begue Belgium Gwlad Belg Benedict reagent adweithydd Benedict Benedict reagents adweithydd Benedict Benedictine Benedictiad Benedictine San Bened Berlin Congress Cyngres Berlin Berlin airlift awyrgludiad Berlin Berlin airlifts awyrgludiad Berlin Bessemer converter trawsnewidydd Bessemer Bessemer converter furnace ffwrnais drawsnewidydd Bessemer Bessemer converter furnaces ffwrnais drawsnewidydd Bessemer Bessemer converters trawsnewidydd Bessemer Bezier curve cromlin Bezier Bezier curves cromlin Bezier Bhagavad Gita Bhagavad Gita Bible Beibl Biblical Beiblaidd Bill of Rights Mesur Iawnderau Bishop William Morgan Esgob William Morgan Bishop of Bangor's jig dawns Esgob Bangor Bismarckian system cyfundrefn Fismarcaidd Bismarckian systems cyfundrefn Fismarcaidd Black Acts Deddfau Duon Black Book of the Household Llyfr Du Cyfrifon y Llys Black Code Cod y Caethion Du (Code Noir) Black Country Gwlad Ddu Black Death Pla Du Black Friar Brawd Du Black Friday Dydd Gwener Du Black Hand Llaw Ddu Black Power Pŵer Du Black Prince Tywysog Du Blanketeers Blancedwyr Blessed Gwynfydedig Blessed Virgin Mary Morwyn Fair Fendigaid Blood Bath of Stockholm Galanas Stockholm Bloody Assizes Brawdlys Gwaedlyd Bloody Mary Mari Waedlyd Bloody Sunday Sul y Gwaed Boadicea Buddug Board School Ysgol Bwrdd Board of Admiralty Bwrdd y Morlys Board of Education Bwrdd Addysg Board of Guardians Bwrdd Gwarcheidwaid Board of Health Bwrdd Iechyd Bodhisattva Bodhisattva Bodleian Library Llyfrgell Bodley Boer Boer Boer War Rhyfel y Boer Bohemian Brethren Brodyr Bohemia Bokhara couching cowtsio Bokhara Bolshevik Bolsiefig Bolshevik Bolsiefigaidd Bonapartism Bonapartiaeth Bond of Association Cwlwm Cydweithred Book of Advertisements Llyfr yr Hysbysebion Book of Discipline Llyfr Disgyblaeth Book of Hours Llyfr Oriau Book of Martyrs Llyfr Merthyron Book of Orders Llyfr Gorchmynion Book of Sports Llyfr Chwaraeon Boolean Boole Boolean algebra algebra Boole Boolean algebras algebra Boole Boolean expression mynegiad Boole Boolean expressions mynegiad Boole Boolean logic rhesymeg Boole Boolean logics rhesymeg Boole Boolean operation gweithrediad Boole Boolean operations gweithrediad Boole Boolean operator gweithredydd Boole Boolean operators gweithredydd Boole Boolean type math Boole Boolean types math Boole Boolean value gwerth Boole Boolean values gwerth Boole Boolean variable newidyn Boole Boolean variables newidyn Boole Bourbon restoration adferiad y Bourboniaid Bourbon restorations adferiad y Bourboniaid Bourbons Bourboniaid Bow Street Runner Ceidwad Bow Street Bow's notation nodiant Bow Bow's notations nodiant Bow Bowman's capsule cwpan Bowman Bowman's capsules cwpan Bowman Boxer Rising Gwrthryfel y Bocswyr Boyar Boiar Brahman Brahman Brahmin Brahmin (Sanskrit) Brave West Winds Gwyntoedd Grymus y Gorllewin Brethren of the Common Life Brodyr y Bywyd Cyffredin Brigadier Brigadydd Bristol board bwrdd Bryste Bristol boards bwrdd Bryste Britannia metal metel Britannia Britannia metals metel Britannia British Crime Survey Arolwg Trosedd Prydain British Electrical Approvals Board Bwrdd Cymeradwyo Trydan Prydain (BEAB) British Savings Bonds Bondiau Cynilo Prydeinig British School Ysgol Brydeinig British Standard Safon Brydeinig British Standard specification manyleb Safonau Prydeinig British Standard specifications manyleb Safonau Prydeinig British Standards Institution Sefydliad Safonau Prydeinig British film industry diwydiant ffilm Prydain Briton Brython (Ancient) Briton Prydeiniwr (Modern) Broadcasting Standards Commission Comisiwn Safonau Darlledu Bronze Age Oes Efydd Brother Preacher Brawd-Bregethwr Brownian movement symudiad Brown (motion) Brownian movements symudiad Brown (motion) Brussels sprouts ysgewyll Brythonic Brythonaidd Buddha Bwdha Buddhahood Bwdhadod Buddhism Bwdhaeth Buddhist Bwdhaidd Buddhist Bwdhydd Bunsen burner llosgydd Bunsen Bunsen burners llosgydd Bunsen Burgundian Bwrgwynaidd Burgundian Bwrgwyniad Byzantine Bysantaidd Byzantine chant siant Fysantaidd Byzantine chants siant Fysantaidd Byzantine music cerddoriaeth Fysantaidd Byzantine musics cerddoriaeth Fysantaidd C clef cleff C C clefs cleff C C major C fwyaf C majors C fwyaf C minor C leiaf C minors C leiaf C.R.C.A. sheet siten ddur meddal gloyw wedi'i rholio'n oer a'i hanelio'n oer C.R.C.A. sheets siten ddur meddal gloyw wedi'i rholio'n oer a'i hanelio'n oer CAI computer aided instruction CAI hyfforddiant drwy gymorth cyfrifiadur CAI computer aided instructions CAI hyfforddiant drwy gymorth cyfrifiadur CATE Committee for the Accreditation of Teachers Education Pwyllgor Achredu Addysg Athrawon CATS Consortium for Assessment and Testing in Schools CAPY Consortiwm Asesu a Phrofi mewn Ysgolion CATS Credit Accumulation and Transfer Scheme Cynllun Casglu a Throsglwyddo Credydau CESIL CESIL CFCs CFCau CNAA Cyngor Dyfarniadau Academaidd Cenedlaethol COBOL COBOL CODASYL CODASYL Caerffili cheese caws Caerffili Caerffili cheeses caws Caerffili Caesar Cesar Caesarean birth genedigaeth Gesaraidd Caesarean births genedigaeth Gesaraidd Caesarean section toriad Cesaraidd Caesarean sections toriad Cesaraidd Caledonian Caledonaidd Calvin Calfin Calvin cycle cylchred Calvin Calvin cycles cylchred Calvin Calvinism Calfiniaeth Calvinistic Methodism Methodistiaeth Galfinaidd Cambrian Cambriaidd Canadian Shield Tariandir Canada Candlemas Gŵyl Fair y Canhwyllau Canon Law Cyfraith Ganonaidd (Roman Catholic) Cape Horn Horn, Yr Cape of Good Hope Penrhyn Gobaith Da Capetian Capetaidd Capital Transfer Tax Treth Trosglwyddo Cyfalaf Capuchin Friar Brawd Cycyllog Capuchin Order Urdd y Brodyr Cycyllog Caractacus Caradog Carbonari Carbonariaid Carlsbad decrees archddyfarniadau Carlsbad Carmelite Friar Brawd Carmelaidd Carmelite Order Urdd y Carmeliaid Carolingian Carolingaidd Carolingian art celfyddyd Garolingaidd Carolingian arts celfyddyd Garolingaidd Carragheen moss mwsogl Carragheen Cartesian Cartesaidd Cartesian coordinates cyfesurynnau Cartesaidd Cartesian dualism deuoliaeth Gartesaidd Cartesian dualisms deuoliaeth Gartesaidd Cartesian equation hafaliad Cartesaidd Cartesian equations hafaliad Cartesaidd Carthusian Carthwsiad Carthusian Order Urdd y Carthwsiaid Casket Letters Llythyrau'r Blwch Casparian strip stribed Caspari Casparian strips stribed Caspari Castilian Castilaidd Castilian Castiliad Cathar Cathariad Cathay Company Cwmni Cathay Catherine Catrin Catherine the Great Catrin Fawr Catholic Pabydd (of Roman Catholic) Catholic Emancipation Rhyddfreinio'r Pabyddion Catholic Emancipation Act Deddf Rhyddfreinio'r Pabyddion Catholic Majesties Eu Mawrhydi Catholig Catholic Martyrs Merthyron Pabyddol Catholic association cymdeithas Gatholig Catholic associations cymdeithas Gatholig Catholic church eglwys Gatholig Catholic churches eglwys Gatholig Catholic leadership arweinwyr Catholig Catholicism Pabyddiaeth Celsius Celsius Celtic Celtaidd Celtic Celteg (language) Celtic art celfyddyd Geltaidd Celtic arts celfyddyd Geltaidd Celtic cross croes Geltaidd Celtic form ffurf Geltaidd Celtic forms ffurf Geltaidd Celtic harp telyn Geltaidd Celtic harps telyn Geltaidd Celtic society cymdeithas Geltaidd Central Criminal Court Llys Troseddol Canolog Central Office of Information Swyddfa Hysbysrwydd Ganolog Central Place Theory Damcaniaeth Man Canol Central Welsh Board Bwrdd Canol Cymreig Centre for Policy Studies Canolfan Astudiaethau Polisi Centronics interface rhyngwyneb Centronics Centronics interfaces rhyngwyneb Centronics Certificate of Education Tystysgrif Addysg (CoE) Certificate of Extended Education Tystysgrif Addysg Estynedig (CEE) Certificate of Pre-Vocational Education Tystysgrif Addysg Gyn-Alwedigaethol (CPVE) Chambers of Reunion Siambrau Ailuniad Chancellor of the Exchequer Canghellor y Trysorlys Chancery Siawnsri Charlemagne Siarlymaen Charles the Bald Siarl Foel Charles the Bold Siarl Ddewr Charles the Good Siarl Dda Charles the Great Siarl Fawr Charter Roll Rhôl Siarter Chartist movement mudiad y Siartwyr Chartist movements mudiad y Siartwyr Cheddar cheese caws Cheddar Cheddar cheeses caws Cheddar Chelsea bun byns Chelsea Chelsea buns byns Chelsea Cheshire cheese caws Caer Cheshire cheeses caws Caer Chief Justice Prif Ustus Child Care Act Deddf Gofal Plant Children's Crusade Croesgad y Plant Chinese block bloc Tsieineaidd Chinese blocks bloc Tsieineaidd Chinese white gwyn Tsieina Chinese whites gwyn Tsieina Christ Crist Christendom Gwledydd Cred Christian Cristion Christian Cristnogol Christian Church Eglwys Gristnogol, yr Christian Court Cwrt Eglwysig Christian Democrat Party Plaid Ddemocrataidd Gristnogol Christian belief cred Gristnogol Christian beliefs cred Gristnogol Christian church eglwys Gristnogol Christian churches eglwys Gristnogol Christian faith ffydd Gristnogol Christian faiths ffydd Gristnogol Christian family teulu Cristnogol Christian heritage etifeddiaeth Gristnogol Christian heritages etifeddiaeth Gristnogol Christian teaching dysgeidiaeth Gristnogol Christian teachings dysgeidiaeth Gristnogol Christianity Cristnogaeth Christmas Nadolig Church in Wales Eglwys yng Nghymru, yr Church of England Eglwys Loegr Cinque Ports Pum Porthladd Cisalpine Republic Gweriniaeth Isalpaidd Cistercian Sistersaidd Cistercian Sistersiad Citizens Advice Bureau Canolfan Gynghori City Technology College Coleg Technegol Dinas (CTC) Civil Code Cod Sifil Civil Law Cyfraith Sifil Close Roll Rhôl Clos Closure Rule Rheol Gaefa Cluniac Order Urdd Cluny Coercion Act Deddf Gorfodaeth Colonial Secretary Ysgrifennydd y Trefedigaethau Combination Act Deddf Cyfuno Cominform Cominfform Commercial Code Cod Masnach Commissions for Sequestration Comisiynwyr yr Atafaeliad Committee for Plundered Ministers Pwyllgor y Gweinidogion Ysbeiliedig Committee for the Propagation of the Gospel Pwyllgor er Taenu'r Efengyl Committee of Accounts Pwyllgor Cyfrifon Committee of Delinquency Pwyllgor Troseddau Committee of Public Safety Pwyllgor Diogelwch y Cyhoedd Common Weal Lles Cyffredin Commonwealth Games Gemau'r Gymanwlad Commonwealth of Independent States Cymanwlad y Gwladwriaethau Annibynnol Communist Party Plaid Gomiwnyddol Community Health Council Cyngor Iechyd Cymdeithas Competition Commission Comisiwn Cystadleuaeth Computer Integrated Manufacture Gweithgynhyrchu drwy Integreiddio Cyfrifiaduron Concert of Europe Cytgord Ewrop Conciliar Movement Mudiad y Cynghorau Confederacy taleithiau Cydffederal (US) Confederation of the Rhine Cydffederasiwn y Rhein Confession of Augsburgh Cyffes Augsburg Confraternity of Christian Doctrine Brawdoliaeth Dysgeidiaeth Gristnogol Confucian Conffiwsaidd Confucian Conffiwsiad Congested Local Board Bwrdd Lleol Gorboblogaeth Congregationalist Annibynnol Congregationalist Annibynnwr Congregations of Christ Cynulleidfaoedd Crist Congregations of Congress Cyfarfodydd Cyngres Congress Party Plaid y Gyngres Congress System Cyfundrefn Gyngresol Congress of Berlin Cyngres Berlin Conservative Party Plaid Geidwadol Conspiracy & Protection of Property Act Deddf Cynllwyn a Diogelu Eiddo Conspiracy of Equals Cynllwyn y Cydraddolion Constantine the Great Cystennin Fawr Consumer Advice Service Gwasanaeth Cynghori Defnyddwyr Consumer Credit Act Deddf Credyd Defnyddwyr Consumer Protection Act 1987 Deddf Gwarchod Defnyddwyr 1987 Consumer Protection Act 1987s Deddf Gwarchod Defnyddwyr 1987 Consumer Protection Department Adran Gwarchod Defnyddwyr Consumer Protection Department Act Deddf Adran Gwarchod Defnyddwyr Continental System System Gyfandirol (1806-12) Control of Substances Hazardous to Health Rheoli Sylweddau sy'n Beryglus i Iechyd Conventigles Act Deddf y Confentiglau Conway Races Campau Conwy Coriolis force grym Coriolis Coriolis forces grym Coriolis Corn Hog Belt Ardal Corn a Moch Corn Law Deddf Ŷd Cornish pasty pastai Gernyw Corporation Act Deddf Corfforaeth Corporations & Municipalities Act Deddf Trefi a Chorfforaethau Corrupt Practices Act Deddf Gweithrediadau Llwgr Cossack Cosac Council for Educational Technology Cyngor Addysg a Thechnoleg Council of Blood Cyngor Gwaedlyd Council of Regency Cyngor y Rhaglywiaeth Council of the North Cyngor y Gogledd Counsel Learned in the Law Cwnsler Dysgedig yn y Gyfraith Count Palatine Cownt Palatin Counter-Remonstrants Gwrth-Haerwyr Coupon Election Etholiad y Cwpon Court of Admiralty Llys y Morlys Court of Appeal Llys Apêl Court of Arches Cwrt y Bwâu Court of Chancery Cwrt Siawnsri Court of Common Pleas Cwrt Pledion Cyffredin Court of Criminal Appeal Llys Apêl Troseddol Court of Exchequer Cwrt y Siecr Court of First Fruits and Tenths Cwrt Anodau a Degawdau Court of General Surveyors Cwrt Archwilwyr Cyffredinol Court of Great Sessions Llys y Sesiwn Fawr Court of High Commission Cwrt yr Uchel Gomisiwn Court of King's Bench Cwrt Mainc y Brenin Court of Petty Sessions Llys Bach Court of Quarter Sessions Llys Chwarter Court of Requests Cwrt y Deisyfion Court of Star Chamber Llys Siambr y Seren Court of Wards & Liveries Cwrt Gward a Lifrai Courts and Legal Services Act Deddf Llysoedd a Gwasanaethau Cyfreithiol Courts of Assize Brawdlys Cowper’s gland chwarren Cowper Cowper’s glands chwarren Cowper Craft Design Technology Crefft Dylunio a Thechnoleg (CDT) Creole Creol (of person) Crete Creta Crimean War Rhyfel y Crimea Criminal Code Cod Troseddol Criminal Law Act Deddf Cyfraith Trosedd Criminal Law Amendment Act Deddf Newid y Gyfraith Trosedd Crimplene Crimplene Crown Court Llys y Goron Crown Prosecution Service Gwasanaeth Erlyn y Goron Crutched Friar Brawd y Groes Cubist Ciwbaidd Cubist Ciwbydd Curia Llys y Pab (papal) Curia Regis Roll Rhôl Llys y Brenin Customary Law Cyfraith Defod Cyrillic alphabet gwyddor Gyrilig Cyrillic alphabets gwyddor Gyrilig Czech crisis argyfwng Tsiecoslofacia D major D fwyaf D majors D fwyaf D minor D leiaf D minors D leiaf D-Day landings glaniadau D-Day Dada Dada Dadaism Dadaiaeth Dainty Davy dance Dawns Dafydd Gain Dainty Davy dances Dawns Dafydd Gain Dalai Lama Dalai Lama Dalit Dalit Dane Daniad Danegeld Treth y Daniaid Danelaw Rhanbarth y Daniaid Danish Danaidd Danish Daneg (language) Dark Ages Oesoedd Tywyll Darwin finch pinc Darwin Darwin finches pinc Darwin Darwinism Darwiniaeth Data Protection Act Deddf Gwarchod Data Day of Atonement Dydd y Cymod Day of Barricades Dydd y Baricedau Day of Dupes Dydd y Twyllo Days of Gladness Dyddiau Llawenydd Debtor's Prison Carchar Dyledwyr Decembrists' Revolt Gwrthryfel y Rhagfyrwyr Declaration of Independence Datganiad Annibyniaeth Declaration of Indulgence Datganiad Pardwn Declaration of Rights Datganiad Iawnderau Declaratory Act Deddf Datganiad Deep South De Eithaf (US) Defence Bonds Bondiau Amddiffyn Defender of the Faith Amddiffynnydd y Ffydd Delegates Court Llys Anfonogion Delft ware crochenwaith Delft Delft wares crochenwaith Delft Democratic Party Plaid Ddemocrataidd Department for Education and Employment Adran Addysg a Chyflogaeth Department of Trade and Industry Adran Diwydiant a Masnach Dewey Decimal System System Ddegol Dewey Dhootie cloth brethyn Dhootie Dhootie cloths brethyn Dhootie Dichloro Diphenyl Trichloroethane DDT Deucloro Deuffenyl Tricloroethan DDT Diet of Worms Diet Worms Diggers Cloddwyr Director of Public Prosecutions Cyfarwyddwr Erlyniadau Cyhoeddus Directory Directoire Disarmament Commission Comisiwn Diarfogi District Health Authority Awdurdod Iechyd Dosbarth (DHA) Divine Right of Kings Dwyfol Hawl Brenhinoedd Divisional Court of the QBD Llys Adrannol Mainc y Frenhines Divisionist Rhaniadwr Diwali Diwali Doctrine of Atonement Athrawiaeth yr Iawn Doctrine of Non-recognition Athrawiaeth Gwrthod Cydnabod Doctrine of Papal Infallibility Athrawiaeth Anffaeledigrwydd y Pab Domesday Book Llyfr Domesday Dominican Dominicaidd Dominican Dominiciad Dominican Order Urdd Sant Dominic Donation of Constantine Rhodd Cystennin Dorian mode modd Doriaidd Dorian modes modd Doriaidd Down's syndrome syndrom Down Down's syndromes syndrom Down Dreikaiserbund Cynghrair y Tri Brenin Dreyfus affair helynt Dreyfus Dreyfus affairs helynt Dreyfus Dual Monarchy Brenhiniaeth Ddeuol Duke of Lancaster Dug Lancaster Duke of York Dug Efrog Dundee cake teisen Dundee Dundee cakes teisen Dundee Durga Durga Durga Puja Durga Puja Dutch Iseldiraidd Dutch Iseldireg (language) Dutch elm disease clefyd llwyfen yr Iseldiroedd Dutch elm diseases clefyd llwyfen yr Iseldiroedd Dutch metal aloi'r Iseldiroedd Dutch metals aloi'r Iseldiroedd Dutchman Iseldirwr E major E fwyaf E majors E fwyaf E minor E leiaf E minors E leiaf EBCDIC code cod EBCDIC EBCDIC codes cod EBCDIC EBP Education Business Partnership PAB Partneriaeth Addysg Busnes Earl Marshall Iarll Farsial Early Bronze Age Oes Efydd Gynnar Early Christian art Celfyddyd Cristnogaeth Gynnar Early Christian arts Celfyddyd Cristnogaeth Gynnar Earth Daear (of planet) East India Company Cwmni India'r Dwyrain Easter Pasg Easter day Sul y Pasg Eastern Europe Dwyrain Ewrop Eastern Question Cwestiwn y Dwyrain Eastern grip gafael y flaen-llaw Eastern grips gafael y flaen-llaw Eastern religions crefyddau’r Dwyrain Ecclesiastical Ordinances Ordinhadau Eglwysig Economic & Social Council Cyngor Economaidd a Chymdeithasol Edict of Emancipation Cyhoeddeb Rhyddfreiniad Edict of Fraternity Cyhoeddeb Brawdgarwch Edict of Restitution Cyhoeddeb Adferiad (1629) Education Act Deddf Addysg Education Reform Act Deddf Diwygio Addysg Education Secretary Ysgrifennydd Addysg Edward the Confessor Edward Gyffeswr Edward the Elder Edward yr Hynaf Edwardian Edwardaidd Edwardian Conquest Goresgyniad Edward Edwardian Settlement Ardrefniant Edward Edwardian era oes Edwardaidd Edwardian eras oes Edwardaidd Egyptian hieroglyphics hieroglyffigau'r Eifftwyr Egyptology Eifftoleg Eightfold Path Llwybr Wythblyg (in Buddhism) Ejection of Scandalous Ministers Act Deddf Diarddel Gweinidogion Gwarthus El Niño El Niño Elector Etholydd (Germany) Elector Archbishop Etholydd Archesgob Elector Palatine Etholydd Palatin Eleven Years Tyranny Gormes yr Un Mlwydd ar Ddeg Elizabeth I Elizabeth I Elizabethan Elisabethaidd Elizabethan Church Settlement Ardrefniant Eglwysig Elizabeth Elizabethan history hanes oes Elizabeth Elohim Elohim Emancipation Act Deddf Rhyddfreinio Emmanuel the Fortunate Emaniwel Ffodus Employers' and Workmen's Act Deddf Cyflogwyr a Gweithwyr Enclosure Acts Deddfau Cau Tiroedd Enclosure of Common Land Act Deddf Cau Tir Comin England regions rhanbarthau Lloegr English Common Law Cyfraith Gwlad Lloegr English Law Cyfraith Loegr English bond bondin Seisnig English bonds bondin Seisnig English garden wall bonding bondin Seisnig wal gardd English garden wall bondings bondin Seisnig wal gardd English horn cor anglais English horns cor anglais English quilting cwiltio Seisnig English suite cyfres Seisnig English suites cyfres Seisnig Enlightenment Goleuo Environmental Health Department Adran Iechyd yr Amgylchedd Environmental Protection Act Deddf Amddiffyn yr Amgylchedd Eocene Ëosen Epiphany Ystwyll Episcopal authority awdurdod Esgobaethol Equity Court Cwrt Ecwiti Equity Law Cyfraith Ecwiti Erasmianism Erasmiaeth Erastianism Erastiaeth Erfurt union undeb Erfurt Erfurt unions undeb Erfurt Espagnole sauce saws Espagnole Espagnole sauces saws Espagnole Estates General Stadau Cyffredinol Ethelred the Unready Ethelred y Digyngor Etruscan art celfyddyd Etrwsgaidd Etruscan arts celfyddyd Etrwsgaidd Eucharist Ewcharist Euclid's algorithm algorithm Ewclid Euclid's algorithms algorithm Ewclid Euclidean Ewclidaidd European Coal & Steel Community Cymuned Glo a Dur Ewrop European Convention on Human Rights Confensiwn Ewropeaidd ar Hawliau Dynol European Free Trade Area Ardal Fasnach Rydd Ewropeaidd European Law Convention on Human Rights Cytundeb Iawnderau Dynol Ewrop European Union Undeb Ewropeaidd European classical tradition traddodiad clasurol Ewropeaidd European classical traditions traddodiad clasurol Ewropeaidd European context cyd-destun Ewropeaidd European contexts cyd-destun Ewropeaidd European dimension dimensiwn Ewropeaidd European dimensions dimensiwn Ewropeaidd European exploration fforio Ewropeaidd European law cyfraith Ewrop European laws cyfraith Ewrop Europeanization Ewropeiddio Eurosize Ewrofaint (cartons) Eurozone Ewrodir Eustachian tube tiwb Eustachio Eustachian tubes tiwb Eustachio Evans' Jig Dawns Ifan Exchequer Court Llys y Siecr Exclusion Act Deddf Gwahardd Exclusion Crisis Argyfwng y Gwahardd Exeter pattern hammer morthwyl patrwm Exeter Exeter pattern hammers morthwyl patrwm Exeter Exile Caethglud (of Jews in Old Testament) Exodus Exodus (book in the Bible) F attachment ymlyniad F (trombone) F attachments ymlyniad F (trombone) F clef cleff F F clefs cleff F F major F fwyaf F majors F fwyaf F minor F leiaf F minors F leiaf Fabian Society Cymdeithas y Ffabiaid Fabianism Ffabiaeth Fablon Fablon Factory Acts Deddfau Ffatri Fair Trading Office Act Deddf Swyddfa Masnachu Teg Fallopian tube tiwb Fallopio Fallopian tubes tiwb Fallopio Family Expenditure Survey Arolwg Gwariant Teulu Family Health Services Authority Awdurdod Gwasanaethau Iechyd Teulu (FHSA) Family Income Supplement Atodiad Incwm Teulu Far East Dwyrain Pell Fascist Italy Yr Eidal Ffasgaidd Fashoda crisis argyfwng Fashoda Feast of Andrew the Apostle Gŵyl Sant Andreas Feast of James the Apostle Gŵyl Iago'r Apostol Feast of John the Apostle Gŵyl Ioan yr Apostol Feast of John the Baptist Gŵyl Ifan Feast of Lucy Gŵyl Lleuan Wyryf Feast of Matthew the Apostle Gŵyl Fathew yr Apostol Feast of Peter and Paul Gŵyl Bedr a Phawl Feast of Pope Calixtus Gŵyl y Pab Calixtus Feast of St Benedict Gŵyl Sant Benedict Feast of St Cecilia Gŵyl Cecilia Wyryf Feast of St David Gŵyl Ddewi Feast of St Denis Gŵyl Sant Denis Feast of St Hilary Gŵyl Sant Hyllar Feast of St Luke the Evangelist Gŵyl Luc Efengylwr Feast of St Martin Gŵyl Sant Martin Feast of St Michael Gŵyl Sant Mihangel Feast of St Patrick Gŵyl Badrig Feast of St Paul Gŵyl Bawl Feast of Stephen the Martyr Gŵyl San Steffan Feast of Thomas the Apostle Gŵyl Tomos yr Apostol Fehlings solution hydoddiant Fehling Fehlings solutions hydoddiant Fehling Fenian Ffeniad Fenian Brotherhood Brawdoliaeth y Ffeniaid Fenian Movement Mudiad y Ffeniaid Ferdinand Fferdinand Fertile Crescent Cilgant Ffrwythlon Field of the Cloth of Gold Maes y Brethyn Euraid Fifth Monarchist Pumed Frenhinwr Fifth Monarchy Pumed Frenhiniaeth Fifth Republic Pumed Weriniaeth Final Solution Ateb Terfynol Fine Roll Rhôl Tâl am Fraint First Fruits and Tenths Act Deddf Blaenffrwyth a Degadau First International Cymdeithas Ryngwladol Gyntaf (Working-Men's Association) First Republic Gweriniaeth Gyntaf First World War Rhyfel Byd Cyntaf Fisher Exact Probability Test Prawf Tebygolrwydd Union Fisher Five Classics Pum Clasur (in Confucianism) Five Mile Act Deddf Pum Milltir Five Pillars of Islam Pum Piler Islam Five Ways Pum Ffordd Flemish bond bondin Ffleminaidd Flemish bonds bondin Ffleminaidd Flemish garden wal bonding bondin Ffleminaidd wal gardd Flemish garden wal bondings bondin Ffleminaidd wal gardd Florentine art celfyddyd Fflorens Florentine arts celfyddyd Fflorens Food & Agriculture Organization Cyfundrefn Fwyd ac Amaeth (FAO) Food and Drugs Act Deddf Bwyd a Chyffuriau Forestry Commission Comisiwn Coedwigaeth Forstner bit ebill Forstner Forstner bits ebill Forstner Forty Two Articles Dwy Erthygl a Deugain Four Freedoms Pedwar Rhyddid Francis Ffransis Franciscan Ffransisgaidd Franciscan Ffransisiad Franciscan Order Urdd Sant Ffransis Franco-Prussian War Rhyfel Ffrainc a Phrwsia Frankish Ffrancaidd Franks Ffranciaid Frederick Ffredric Frederick the Great Ffredric Fawr Free French Ffrancwyr Rhydd Free Will Defence Amddiffyniad Ewyllys Rydd French Revolution Chwyldro Ffrengig French beans ffa Ffrengig French bread bara Ffrengig French breads bara Ffrengig French bun picen Ffrengig French buns picen Ffrengig French chalk sialc Ffrengig French chalks sialc Ffrengig French curve templed tro French curves templed tro French dressing blaslyn Ffrengig French dressings blaslyn Ffrengig French harp organ geg French harps organ geg French horn corn Ffrengig French horn player canwr corn Ffrengig French horn players canwr corn Ffrengig French horns corn Ffrengig French knot cwlwm Ffrengig French knots cwlwm Ffrengig French nail hoelen gron French nails hoelen gron French overture agorawd Ffrengig French overtures agorawd Ffrengig French pitch traw safonol French pitches traw safonol French polish llathrydd Ffrengig French polish finish gorffeniad llathrydd Ffrengig French polish finishs gorffeniad llathrydd Ffrengig French polishs llathrydd Ffrengig French seam sêm Ffrengig French seams sêm Ffrengig French sixth chweched Ffrengig French sixth chord cord y chweched Ffrengig French sixth chords cord y chweched Ffrengig French sixths chweched Ffrengig French suite cyfres Ffrengig French suites cyfres Ffrengig French window ffenestr Ffrengig French windows ffenestr Ffrengig Friendly Society Cymdeithas Gyfeillgar Friends of the Earth Cyfeillion y Ddaear Further Education Unit Uned Addysg Bellach (FEU) Futurists Dyfodolwyr G clef cleff G G clefs cleff G G cramp cramp G G cramps cramp G G major G fwyaf G majors G fwyaf G minor G leiaf G minors G leiaf GCSE Extended Welsh TGAU Cymraeg Estynedig GCSE Extended Welsh Second Language TGAU Cymraeg Ail Iaith Estynedig GEST Grantiau Cefnogi a Hyfforddi Addysg (Grants for Education Support and Training) Gag Acts Deddfau Ffrwyno Galapagos Islands Ynysoedd y Galapagos Galilee Galilea (porch) Gallican Galicanaidd Gallican Galicaniad Gallicanism Galicaniaeth Ganesh / Ganesha / Ganapati Ganesh / Ganesha / Ganapati Gannt chart siart Gannt Gannt charts siart Gannt Gascon Gascon Gemara Gemara General Agreement on Tariffs and Trade Cytundeb Cyffredinol ar Dollau a Masnach (GATT) General Assembly Cynulliad Cyffredinol General Certificate of Secondary Education Tystysgrif Gyffredinol Addysg Uwchradd (GCSE) General National Vocational Qualification Cymhwyster Galwedigaethol Cenedlaethol Cyffredinol (GNVQ) Gentleman at Arms Bonheddwr y Gwarchodlu Gentleman of the Bedchamber Bonheddwr y Siambr Wely Geoffrey of Monmouth Sieffre o Fynwy Georgian Sioraidd Gerald of Wales Gerallt Cymro Geraldines Geraldiaid German Confederation Cydffederasiwn Almaenig German Democratic Republic Gweriniaeth Dwyrain yr Almaen German Empire Ymerodraeth yr Almaen German Federal Republic Gweriniaeth Ffederal yr Almaen German Reformation Diwygiad Protestannaidd yn yr Almaen German ladder ysgol Almaenig German ladders ysgol Almaenig German measles brech Almaenig German offensive ymosodiad yr Almaenwyr German offensives ymosodiad yr Almaenwyr German sixth chweched Almaenig German sixth chord cord y chweched Almaenig German sixth chords cord y chweched Almaenig German sixths chweched Almaenig German suite cyfres Almaenig German suites cyfres Almaenig German unification uno'r Almaen Gestapo Gestapo Ghibelline Gibeliniad Giffen goods nwyddau Giffen Gladstonian liberalism rhyddfrydiaeth Gladstone Gladstonian liberalisms rhyddfrydiaeth Gladstone Glisson's capsule cwpan Glisson Glisson's capsules cwpan Glisson Glorious Revolution Chwyldro Gogoneddus God Duw Gold Standard Safon Aur Golden Age Oes Aur Golden Bull Bwla Aur Golden Fleece Cnu Aur Golden Horde Llu Euraidd Golden Mean Cymedr Euraid Golden Temple Teml Aur Golgi apparatur organigyn Golgi Golgi apparaturs organigyn Golgi Good Friday Dydd Gwener y Groglith Good Parliament Senedd Dda Goodhart's law deddf Goodhart Goodhart's laws deddf Goodhart Gothic Gothig Gothic architecture pensaernïaeth Gothig Gothic architectures pensaernïaeth Gothig Gothic art celfyddyd Gothig Gothic arts celfyddyd Gothig Gothic sculpture cerflunwaith Gothig Gothic sculptures cerflunwaith Gothig Graafian follicle ffoligl Graaf Graafian follicles ffoligl Graaf Grace of Alais Pardwn Alais Gracious Aid Cymhorthdreth Wirfoddol Graeco-Roman Groeg-Rufeinig Grand Alliance Cynghrair Fawr Grand National Consolidated Union Undeb Llafur Unedig Cenedlaethol Grand Pensionary Prif Swyddwr (Netherlands) Grand Remonstrance Gwrthdystiad Mawr Grandees Mawrion, y Great Circle Route Llwybr Cylch Mawr Great Contract Cytundeb Mawr Great Council Cyngor Mawr Great Depression Dirwasgiad Mawr Great Elector Etholydd Mawr Great Exhibition Arddangosfa Fawr Great Fire of London Tân Mawr Llundain Great Leap Forward Naid Fawr Ymlaen (in China) Great Northern War Rhyfel Mawr y Gogledd Great Plague Pla Mawr Great Powers Pwerau Mawrion Great Purges Carthu Mawr Great Schism Sgism Mawr Great Seal Sêl Fawr Great Sessions Sesiwn Fawr Great Society Cymdeithas Fawrfrydig Great Trek Mudo Mawr Grecian harp telyn Roegaidd Grecian harps telyn Roegaidd Greek Groegaidd Greek Orthodox Church Eglwys Uniongred Roegaidd Greek art celfyddyd Groeg Greek arts celfyddyd Groeg Greek cadence diweddeb amen Greek cadences diweddeb amen Greenwich Mean Time Amser Safonol Greenwich Gregorian Gregoraidd Gregorian Calendar Calendr Gregori Gregory Gregori Grey Friar Brawd Llwyd Gross Domestic Product Cynnyrch Mewnwladol Crynswth Gross National Product Cynnyrch Gwladol Crynswth Guild for the Promotion of Welsh Music Urdd er Hyrwyddo Cerddoriaeth yng Nghymru Guinevere Gwenhwyfar Gulf Stream Llif y Gwlff Gunpowder Plot Cynllwyn y Powdwr Gwn Gurdwara Gurdwara Guru Guru (in Sikhism) Guru Granth Sahib Guru Granth Sahib Guy Fawkes Guto Ffowc H-shaped stretcher estynnwr ffurf H H-shaped stretchers estynnwr ffurf H Haber process proses Haber Hadith Hadith Hajj Hajj Hall effect proximity switch switsh agosrwydd effaith Hall Hall effect proximity switches switsh agosrwydd effaith Hall Hall probe chwiliwr Hall Hall probes chwiliwr Hall Hall voltage foltedd Hall Hall voltages foltedd Hall Hamming code cod Hamming Hamming codes cod Hamming Hanoverian succession olyniaeth Hanoferaidd Hanoverian successions olyniaeth Hanoferaidd Hanseatic League Cynghrair Hansa Hansiatic cities dinasoedd Hansa Hapsburg Hapsbwrg Hapsburg Hapsbwrgaidd Hapsburg empire ymerodraeth Hapsbwrgaidd Hapsburg empires ymerodraeth Hapsbwrgaidd Harijan Harijan Harimandir Sahib Harimandir Sahib Haversian canal sianel Havers Haversian canals sianel Havers Haversian space gwagle Havers Haversian spaces gwagle Havers Heads of Proposals Pennau'r Awgrymiadau Health & Morals of Apprentices Act Deddf Iechyd a Moesau Prentisiaid Health And Safety at Work Act Deddf Iechyd a Diogelwch yn y Gwaith Health Education Council Cyngor Addysg Iechyd Health Improvement Programmes Rhaglenni Gwella Iechyd Hebrew Hebraeg (language) Hellenic Helenaidd Helvetic Helfetig Henle's loop dolen Henle Henle's loops dolen Henle Henry Tudor Harri Tudur Henry VII Harri VII Henry VIII Harri VIII Henry the Lion Harri'r Llew Henry the Navigator Harri'r Mordwywr Her Majesty's Inspectorate Arolygiaeth ei Mawrhydi (HMI) Heresy Act Deddf Heresi Hereward the Wake Hereward Effro Hierarchies of Throne Hierarchaethau Gorseddau High Church Uchel Eglwysig High Commission Uchel Gomisiwn High Constable Uchel Gwnstabl High Court Uchel Lys High Sheriff Uchel Siryf Highest Order Urdd Uchaf Highland Clearances Cliriadau'r Ucheldiroedd Highway Code Rheolau'r Ffordd Fawr Hijra Hijra Hindu Hindŵ Hindu Hindŵaidd Hinduism Hindŵaeth His bundle sypyn His His bundles sypyn His Holi Holi Holy Alliance Cynghrair Sanctaidd Holy Office Gwasanaeth Sanctaidd Holy Orders Urddau Eglwysig Holy Places Mannau Cysegredig Holy Roman Emperor Ymerawdwr Rhufeinig Sanctaidd Holy See Pabaeth Holy Sepulchre Beddrod Sanctaidd Holy Spirit Ysbryd Glân Holy Week Wythnos y Pasg Home Guard Gwarchodlu Cartref Hooke's law deddf Hooke Hooke's laws deddf Hooke Host Hostia House of Commons Tŷ'r Cyffredin House of Lancaster Teulu Lancaster House of Lords Tŷ'r Arglwyddi House of Orange Teulu Orange House of Representatives Tŷ'r Cynrychiolwyr House of York Teulu Iorc Hugh the Fat Huw Fras Huguenot Hiwgenot Huguenot Hiwgenotaidd Human Rights Act Deddf Hawliau Dynol Humble Petition and Advice Deiseb a Chyngor Gostyngedig Hundred Years War Rhyfel Can Mlynedd Hungry Forties Pedwardegau Newynog Hussite Husaidd Hussite Husiad HyperCard HyperCard Hypoaeolian mode modd Hypoaeloiaidd Hypoaeolian modes modd Hypoaeloiaidd Hypodorian mode modd Hypodoriaidd Hypodorian modes modd Hypodoriaidd Hypoionian mode modd Hypoioniaidd Hypoionian modes modd Hypoioniaidd Hypolocrian mode modd Hypolocriaidd Hypolocrian modes modd Hypolocriaidd Hypomixolydian mode modd Hypomicsolydiaidd Hypomixolydian modes modd Hypomicsolydiaidd Hypophrygian mode modd Hypophrygiaidd Hypophrygian modes modd Hypophrygiaidd ICT Resources and Software adnoddau a meddalwedd technoleg gwybodaeth a chyfathrebu ICT system system technoleg gwybodaeth a chyfathrebu ICT systems system technoleg gwybodaeth a chyfathrebu ID card cerdyn adnabod ID cards cerdyn adnabod IEEE interface rhyngwyneb IEEE IEEE interfaces rhyngwyneb IEEE INIST initial and in-service training HCMS hyfforddiant cychwynnol ac mewn swydd INIST initial and in-service trainings HCMS hyfforddiant cychwynnol ac mewn swydd INSET in-service training HMS hyfforddiant mewn swydd INSET in-service trainings HMS hyfforddiant mewn swydd IQ testing profi IQ Ice Age Oes Iâ Iceland spar grisial Gwlad yr Iâ Iceland spars grisial Gwlad yr Iâ Icelandic 'low' gwasgedd isel Gwlad yr Iâ Icelandic 'low's gwasgedd isel Gwlad yr Iâ Idea of Progress Syniad o Gynnydd Ik Onkar Ik Onkar Imperial Chamber Siambr Ymerodraeth Imperial Knight Marchog yr Ymerodraeth Imperial Preference Blaenoriaeth i'r Ymerodraeth Imperial unit uned Imperial Imperial units uned Imperial Improvement Commissioners Comisiynwyr Gwelliannau Independent Labour Party Plaid Lafur Annibynnol (ILP) Independent Television Commission Comisiwn Teledu Annibynnol Index Indecs, Yr (Librorum Prohibitorum) India-corn India corn India-corns India corn Indian Empire Ymerodraeth India Indian art celfyddyd India Indian arts celfyddyd India Indian ink inc India Indian inks inc India Indian oilstone carreg hogi India Indian oilstones carreg hogi India Indian raga raga Indiaidd Indian ragas raga Indiaidd Indian red coch India Indian reds coch India Indian summer Haf Bach Mihangel Indian summers Haf Bach Mihangel Indo-Sumerian Indo-Swmeraidd Industrial Revolution Chwyldro Diwydiannol Inland Revenue Cyllid y Wlad Inner London Council Cyngor Llundain Fewnol Inner Temple Ysbyty'r Inner Temple Inns of Court Ysbytai'r Brawdlys Input / Output Mewnbwn / Allbwn (I/O) Inquisitor General Arch-chwilyswr Institute of International Economics Sefydliad Economeg Ryngwladol Instrument of Government Offeryn Llywodraeth International Undeb Rhyngwladol (=L'internationale) International Atomic Energy Agency Asiantaeth Ryngwladol Egni Niwclear International Brigade Brigâd Ryngwladol International Court of Justice Llys Barn Rhyngwladol International Date Line Dyddlinell International Labour Organization Mudiad Llafur Rhyngwladol International Monetary Fund Cronfa Ariannol Ryngwladol International Red Cross Mudiad y Groes Goch Ryngwladol International Refugee Organization Cyfundrefn Ryngwladol y Ffoaduriaid International Standards Organization Cyfundrefn Safonau Rhyngwladol International Trade Commission Comisiwn Masnach Ryngwladol Interpretation Act 1978 Deddf Dehongliad 1978 Interpretation Act 1978s Deddf Dehongliad 1978 Investiture Contest Ymryson yr Arwisgo Investors in People Buddsoddwyr mewn Pobl Investors in People award gwobr Buddsoddwyr mewn Pobl Ionian mode modd Ionaidd Ionian modes modd Ionaidd Irenaean theodicy theodiciaeth Irenaeus Irish Gwyddel (person) Irish Question Pwnc Iwerddon Irish Sea Môr Iwerddon Irish harp telyn Wyddelig Irish harps telyn Wyddelig Iron Age Oes Haearn Iron Curtain Llen Haearn Irwin twist bit ebill tro Irwin Irwin twist bits ebill tro Irwin Islam Islam Islamic Islamaidd Islamic calligraphy caligraffeg Islamaidd Islamic law cyfraith Islamaidd Islamic laws cyfraith Islamaidd Islamic state gwladwriaeth Islamaidd Islamic states gwladwriaeth Islamaidd Israelite Israeliad Italian overture agorawd Eidalaidd Italian overtures agorawd Eidalaidd Italian painting paentiad Eidalaidd (of painted picture) Italian painting peintio Eidalaidd (of process or art) Italian paintings paentiad Eidalaidd (of painted picture) Italian quilting cwiltio Eidalaidd Italian serenade serenâd Eidalaidd Italian serenades serenâd Eidalaidd Italian sixth chweched Eidalaidd Italian sixth chord cord y chweched Eidalaidd Italian sixth chords cord y chweched Eidalaidd Italian sixths chweched Eidalaidd Italian unification uno'r Eidal Ivan the Great Ifan Fawr Ivan the Terrible Ifan Arswydus J curve effect effaith cromlin J J curve effects effaith cromlin J Jacob chuck crafanc Jacob Jacob chucks crafanc Jacob Jacobean Jacobeaidd Jacobean couching cowtsio Jacobeaidd Jacobin Jacobin Jacobin Jacobinaidd Jacobinism Jacobiniaeth Jacquard weave gwehyddiad Jacquard Jacquard weaves gwehyddiad Jacquard James Iago (king) Janam Sakhis Janam Sakhis Jansenism Janseniaeth Jansenist Jansenydd Japanese Japaneaidd Japanese print print Japaneaidd Japanese prints print Japaneaidd Japanese school ysgol Japaneaidd Japanese schools ysgol Japaneaidd Japji Japji Jarrow Crusade Crwsâd Jarrow Jennings twist bit ebill tro Jennings Jennings twist bits ebill tro Jennings Jerusalem artichoke artisiog Jerwsalem Jerusalem artichokes artisiog Jerwsalem Jesuit Jeswit Jesuit Jeswitaidd Jesuit Order Urdd y Jeswitiaid Jesuitism Jeswitiaeth Jesus Christ Iesu Grist Jewish Easter Pasg yr Iddewon Joan Siwan (wife of Llywelyn the Great) Joan of Arc Jeanne d'Arc Job Centre Canolfan Gwaith Job Control Language Iaith Rheoli Gorchwylion (JCL) Johansson's block bloc Johansson Johansson's blocks bloc Johansson John Ioan (pope) John John (king) Josephson junction cyswllt Josephson Josephson junctions cyswllt Josephson Judaism Iddewiaeth Judgement Day Dydd y Farn Judicature Acts Deddfau Barnweiniad Judicial Committee of the Privy Council Pwyllgor Barnwrol y Cyfrin Gyngor Julian Calendar Calendr Julius Julius Caesar Iŵl Cesar July Monarchy Brenhiniaeth Gorffennaf July Plot Cynllwyn Gorffennaf June days dyddiau Mehefin Junker Junker Jupiter Iau Justice of the Peace Ynad Heddwch (J.P.) Jutes Jiwtiaid Kali Kali Kamares ware crochenwaith Kamares Kamares wares crochenwaith Kamares Kangha Kangha Karah Prashad / Prasad Karah Prashad / Prasad Kathina Kathina Keeper of the Rolls Ceidwad y Rholiau Keeper of the Seals Ceidwad y Seliau Kett rebellion gwrthryfel Kett Kett rebellions gwrthryfel Kett Keynesian Keynesiad (of person) Khalsa Khalsa Kharijite views syniadau'r Kharijitiaid Kids' Club Clwb Plant Kids' Club Leader Arweinydd Clybiau Plant King Consort Brenin Cydweddog King's Evil Haint y Brenin King's Peace Heddwch y Brenin Kingdom of the Two Sicilies Teyrnas y Ddwy Sisilia Kirchoff's first law deddf gyntaf Kirchoff Kirchoff's first laws deddf gyntaf Kirchoff Kirpan Kirpan Kitemark Nod Barcut Klangforme seinwedd Knight Hospitaller Marchog Ysbytaidd Knight Templar Marchog Temlaidd Knight Teutonic Marchog Tiwtonig Knight of the Shire Marchog Sir Knights' War Rhyfel y Marchogion Krebs cycle cylchred fetabolaidd Krebs Krebs cycles cylchred fetabolaidd Krebs Krishna / Krsna Krishna / Krsna Kruger telegram telegram Kruger Kruger telegrams telegram Kruger Kshatriya / Ksatriya Kshatriya / Ksatriya Kupffer cell cell Kupffer Kupffer cells cell Kupffer LEA local education authority AALL awdurdod addysg lleol Labour Party Plaid Lafur Lady chapel capel y Forwyn Lady chapels capel y Forwyn Lady of the Bedchamber Boneddiges y Siambr Wely Laffer curve cromlin Laffer Laffer curves cromlin Laffer Lake District Ardal y Llynnoedd Lakshmi / Laxmi Lakshmi / Laxmi Lancashire cheese caws Swydd Gaerhirfryn Lancashire cheeses caws Swydd Gaerhirfryn Lancastrian Lancastraidd Lancastrian Lancastrydd Lancelot Lawnslot Land Use Survey Arolwg Defnydd Tir (LUS) Late Bronze Age Oes Efydd Ddiweddar Lateran Council Cyngor Lateran Lateran Pacts Cytundebau Lateran Latin Lladin Latin Christendom Gwledydd Cred Rhufeinig Latin quarter rhan Ladinaidd Latin quarters rhan Ladinaidd League of Armed Neutrality Cynghrair Niwtral Arfog League of Nations Cynghrair y Cenhedloedd Lease-Lend Act Deddf Les-Fenthyg Leasehold Reform Act Deddf Diwygio Cyfraith Prydlesi Legion of Honour Lleng Anrhydedd Lent Grawys Lenz's law deddf Lenz Lenz's laws deddf Lenz Levant Company Cwmni'r Lefant Leveller Lefelwr Liberal Democrat Party Plaid y Democratiaid Rhyddfrydol Liberal Party Plaid Ryddfrydol Liberal Unionist Rhyddfrydwr Unoliaethol Liberate Roll Rhôl Pensiwn a Lwfans Licensing Acts Deddfau Trwyddedu Little Hans Hans Fychan Llandaff Reel Dawns Llandaf Llanover Reel Dawns Llanofer Locrian mode modd Locriaidd Locrian modes modd Locriaidd Lollard Lolard Lollard Lolardaidd Lollardy Lolardiaeth London Corresponding Society Cymdeithas Ohebu Llundain London pattern hammer morthwyl patrwm Llundain London pattern hammers morthwyl patrwm Llundain Londoner Llundeiniwr Long March Ymdaith Faith Lord Advocate Arglwydd Adfocad Lord Chancellor Arglwydd Ganghellor Lord Chief Justice Arglwydd Brif Ustus Lord High Admiral Arglwydd Uchel Lyngesydd Lord High Treasurer Arglwydd Uchel Drysorydd Lord Keeper Arglwydd Geidwad Lord Keeper of the Great Seal Arglwydd Geidwad y Sêl Fawr Lord Lieutenant Arglwydd Raglaw Lord Mayor Arglwydd Faer Lord Penrhyn Arglwydd Penrhyn, Yr Lord President Arglwydd Lywydd Lord Protector Arglwydd Amddiffynnydd Lord Shiva Arglwydd Shiva, Yr Lord's Supper Swper yr Arglwydd Lords Marcher Arglwyddi'r Gororau Lords Ordainers Arglwyddi Ordeinwyr Lords Temporal and Spiritual Arglwyddi Lleyg ac Eglwysig Lords of the Congregation Arglwyddi'r Gynulleidfa Lorenzo the Magnificent Lorenzo Ysblennydd Lotus Sutra Lotus Sutra Louis the Pious Louis Dduwiol Low Church Isel Eglwysig Luddite Ludaidd Luddite Ludiad Luminarists Goleueddwyr Lurex Lurex Lutheran Lutheraidd Lutheran Lutheriad Lutheranism Lutheriaeth Ländler Ländler Ländlers Ländler Madinah Madinah Maginot Line Llinell Maginot Magna Carta Magna Carta Magnus Maximus Macsen Wledig Mahabharata Mahabharata Mahayana Mahayana Mahayana Buddhism Bwdhaeth Mahayana Maid of Kent Morwyn Caint Makkah Makkah Malpighian body corffyn Malpighi Malpighian corpuscle corffilyn Malpighi Malpighian corpuscles corffilyn Malpighi Malpighian layer haen Malpighi Malpighian layers haen Malpighi Malpighian tubule tiwbyn Malpighi Malpighian tubules tiwbyn Malpighi Malthusianism Malthwsiaeth Manpower Services Commission Comisiwn Gwasanaethau'r Gweithlu March on Rome Ymdaith i Rufain Marches Mers Marian Marïaidd Marian exiles alltudion Mari Marian martyrs merthyron Mari Marian persecution erledigaeth Mari Marian persecutions erledigaeth Mari Maritime Code Cod y Môr Mars Mawrth Marshall-Lerner condition amod Marshall-Lerner Marshall-Lerner conditions amod Marshall-Lerner Marxism Marcsaeth Marxist Marcsaidd Marxist Marcsydd Mary Stuart Mari Stiwart Mashiach Meseia Maslow’s hierarchy of needs hierarchaeth anghenion Maslow Massacre of St Bartholomew Cyflafan Gwylnos Bartholomeus Massacre of the Sicilian Vespers Cyflafan y Gosberau Sisilaidd Mastersinger Meistersinger Maundy Thursday Dydd Iau Cablyd Mayor of the Palace Maer y Llys McCarthyism McCarthiaeth Mean Information Field Maes Gwybodaeth Gymedrig (MIF) Medical Officer of Health Prif Swyddog Iechyd Mediterranean Mediteranaidd Mediterranean scrub prysgwydd rhanbarth Môr y Canoldir Mediterranean woodland coetir Môr y Canoldir Mediterranean woodlands coetir Môr y Canoldir Megillah Megillah Melanesian Melanesaidd Melanesian art celfyddyd Felanesaidd Melanesian arts celfyddyd Felanesaidd Member of Parliament Aelod Seneddol (MP) Mendelian Mendelaidd Mendelian inheritance etifeddiad Mendelaidd Mendelian inheritances etifeddiad Mendelaidd Menshevik Mensiefig Menshevik Mensiefigaidd Mental Health Act Deddf Iechyd Meddwl Merchant Adventurers Mentrwyr Masnachol Merchant Shipping Act Deddf Llongau Masnach Merciless Parliament Senedd Ddidostur Mercury Mercher Merlin Myrddin Merovingian Merofingaidd Merseyside Glannau Merswy Merthyr rising terfysg Merthyr Merthyr risings terfysg Merthyr Messiah Meseia Metasoa Metasoa Methodism Methodistiaeth Methodist Methodist Methodist Methodistaidd Metropolitan Police Act Deddf Heddlu Metropolitan Microelectronic Education Programme Rhaglen Addysg Microelectroneg (MEP) Microtex llestri Microtex Middle Ages Oesoedd Canol Middle East Dwyrain Canol Midlands Canolbarth Lloegr Midrash Midrash Milk Marketing Board Bwrdd Marchnata Llaeth Milky Way Llwybr Llaethog Millenary Petition Deiseb y Fil Millon's Reagent Adweithydd Millon Mines Act Deddf Mwyngloddiau Minister for Education Gweinidog Addysg Minister of State Gweinidog Gwladol Minister of State for Wales Gweinidog Gwladol dros Gymru Ministry of Defence range maes tanio'r Weinyddiaeth Amddiffyn Minoan Minoaidd Minoan art celfyddyd Finoaidd Minoan arts celfyddyd Finoaidd Mishnah Mishnah Misuse of Drugs Act Deddf Camddefnydd Cyffuriau Mithraism Mithraeth Monel Monel Monetary Policy Committee Pwyllgor Polisi Ariannol Monroe Doctrine Athrawiaeth Monroe Montessori school ysgol Montessori Montessori schools ysgol Montessori Mool / Mul Mantar Mool / Mul Mantar Moor Mŵr Moorish Mwraidd Mormon Mormon Mormon Mormonaidd Moroccan crisis argyfwng Moroco Morse drill dril Morse Morse drills dril Morse Morse taper tapr Morse Morse tapers tapr Morse Mother of God Mam Duw Mu'tazilite views syniadau'r Mu'tazilitiaid Muhammad Muhammad Municipal Corporations Act Deddf Corfforaethau Trefol Munro's foramen fforamen Munro Munro's foramens fforamen Munro Muntz metal metel Muntz Muntz metals metel Muntz Muscovite Moscofaidd Muscovite Moscofwr Muslim Mwslim Muslim Mwslimaidd Muslim theology diwinyddiaeth Fwslimaidd Muster Roll Rhôl Fwstro Mutiny Act Deddf Miwtini Mu’tazili Mu’tazilitiad Mu’tazilis Mu’tazilitiad Müllerian duct dwythell Müller Müllerian ducts dwythell Müller N-stage N-cam N-stages N-cam N-terminal analysis dadansoddiad N-terfynol NAB National Advisory Body for Higher Education in the Public Sector CYC Corff Ymgynghorol Cenedlaethol ar gyfer Addysg Uwch yn y Sector Cyhoeddus NAND NIAC NAND gate adwy NIAC NAND gates adwy NIAC NLQ ansawdd llythyr (near letter quality) NROVA National Record of Vocational Achievement Cofnod Cenedlaethol Cyrhaeddiad Galwedigaethol NVQ National Vocational Qualification CGC Cymhwyster Galwedigaethol Cenedlaethol NVQ framework fframwaith CGC NVQ frameworks fframwaith CGC Nam Simaran Nam Simaran Naples yellow melyn Napoli Naples yellows melyn Napoli Napoleonic Code Cod Napoleon Nashim Nashim National Assembly Cynulliad Cenedlaethol National Assistance Cymorth Gwladol National Curriculum Council Cyngor y Cwricwlwm Cenedlaethol (NCC) National Foundation for Education Research Sefydliad Cenedlaethol ar gyfer Ymchwil mewn Addysg (NFER) National Government Llywodraeth Genedlaethol National Guard Gwarchodlu Cenedlaethol (US) National Health Insurance Act Deddf Yswiriant Iechyd Gwladol National Health Service Gwasanaeth Iechyd Gwladol (NHS) National Insurance Yswiriant Gwladol National Insurance Act Deddf Yswiriant Gwladol National Political Union Undeb Gwleidyddol Cenedlaethol National Savings Cynilion Gwladol National School Ysgol Genedlaethol National Trust Ymddiriedolaeth Genedlaethol National Unemployment Insurance Act Deddf Yswiriant y Di-waith National Union of Students Undeb Cenedlaethol y Myfyrwyr Nationalist Party Plaid Genedlaethol Natural Theology Diwinyddiaeth Natur Nature Conservancy Council Cyngor Gwarchod Natur Navigation Act Deddf Mordwyo Nazi Natsi Nazi Natsïaidd Nazi Germany Almaen Natsïaidd Nazi Party Plaid Natsïaidd Nazi political system cyfundrefn wleidyddol y Natsïaid Nazi political systems cyfundrefn wleidyddol y Natsïaid Nazify Natsïeiddio Near East Dwyrain Agos Neptune Neifion New Deal Bargen Newydd New Deal Policy Polisi'r Fargen Newydd New Economic Policy Polisi Economaidd Newydd New Learning Dysg Newydd New Model Army Byddin Model Newydd New Stone Age Oes Neolithig New Testament Testament Newydd New World Byd Newydd New Year Blwyddyn Newydd Newall limits terfannau Newall Newton's laws of motion deddfau mudiant Newton Newton-Raphson formula fformiwla Newton-Raphson Newton-Raphson formulas fformiwla Newton-Raphson Nezikin Nezikin Nichiren Buddhism Bwdhaeth Nichiren Ninety Five Theses Naw Deg a Phum Pwnc (of Luther) Nissl granules gronynnau Nissl Nordic Llychlynnaidd Norfolk Crop Rotation Cylchdro Cnydau Norfolk Norman Norman (of person) Norman Normanaidd Norman castle castell Normanaidd Norman castles castell Normanaidd Norman conquest concwest Normanaidd Norman conquests concwest Normanaidd Norman-French Ffrangeg Normanaidd (language) Norman-French Ffrengig Normanaidd Normanisation Normaneiddio Norse Llychlynnaidd Norse Norseg (language) Norseman Llychlynnwr North Atlantic Drift Drifft Gogledd Iwerydd North Atlantic Treaty Organization Cyfundrefn Cytundeb Gogledd Iwerydd (NATO) North German Confederation Cydffederasiwn Gogledd yr Almaen North-East Passage Tramwyfa'r Gogledd-Ddwyrain North-West Passage Tramwyfa'r Gogledd-Orllewin Norway spruce pyrwydden Norwy Norway spruces pyrwydden Norwy Nuclear Test Ban Treaty Cytundeb Atal Profion Niwclear OMR form ffurflen DMG OMR forms ffurflen DMG OMR optical mark reader DMG darllenydd marciau gweladwy OMR optical mark readers DMG darllenydd marciau gweladwy OOPS OOPS (Object Orientated Programming System) Obligations Court Cwrt Ymrwymiadau Observant Cadwrydd Occasional Conformity Act Deddf Cydymffurfio Achlysurol Of Noble Race was Shenkin O Uchel Dras oedd Siencyn Ofcom Ofcom (Office of Communications) Offa's Dyke Clawdd Offa Offences Against the Person Act Deddf Troseddau yn Erbyn Person Office for Standards in Education Swyddfa Safonau mewn Addysg (OFSTED) Office of Fair Trading Swyddfa Masnachu Teg Office of Her Majesty's Chief Inspector Swyddfa Prif Arolygydd ei Mawrhydi (OHMCI) Officer of the Royal Court Swyddog Llys y Brenin Official Secrets Act Deddf Cyfrinachau Swyddogol Ohm's law deddf Ohm Ohm's laws deddf Ohm Old Age Pensions Act Deddf Pensiwn yr Henoed Old Norse Hen Norseg Old Stone Age Hen Oes y Cerrig Old Testament Hen Destament Old Testament prophetic literature llenyddiaeth broffwydol yr Hen Destament Old Testament prophetic literatures llenyddiaeth broffwydol yr Hen Destament Old World Yr Hen Fyd Olympic Games Gemau Olympaidd Open College Coleg Agored Open University Prifysgol Agored Option Mortgage Scheme Cynllun Morgais Dewisol Orange Order Urdd Oren Orangeman Orenwr Oratory of Divine Love Oratori'r Cariad Dwyfol Order of the Day Trefn y Dydd Order of the Garter Urdd y Gardys Orders in Council Gorchmynion y Cyfrin Gyngor Ordnance Bench Mark Meincnod Ordnans (OBM) Ordnance Survey Arolwg Ordnans Ordnance Survey map map Ordnans Ordnance Survey maps map Ordnans Ordovician Ordoficaidd Organization of Africa Unity Cyfundrefn Undod Affrica Organization of American States Cyfundrefn Gwledydd America Orthodox Jew Iddew Uniongred Ostwald theory theori Ostwald Oswestry Croesoswallt Oswestry Wake Dawns Croesoswallt Ottoman Otoman Ottoman Otomanaidd Ottoman Empire Ymerodraeth Otomanaidd Ottoman Turk Twrciad Otomanaidd Owenism Oweniaeth Owenite Owenaidd Owenite Owenydd P.B. silimanite silimanit P.B. P.B. silimanites silimanit P.B. P.C.R. radiws pitsh cylch (pitch circle radius) P.C.R.s radiws pitsh cylch (pitch circle radius) PAYE Talu wrth Ennill PP number publications cyhoeddiadau rhif PP PVA PVA PVC PVC (polyvinyl chloride) Pacinian corpuscle corffilyn Pacini Pacinian corpuscles corffilyn Pacini Pact of Steel Cytundeb Dur Palatine Earl Iarll Palatin Palatine of the Rhine Etholaeth Balatin y Rhein Pale Rhanbarth Seisnig (Ireland) Paleocene cyfnod Paleosen Palestine Liberation Organization Mudiad Rhyddid Palesteina Pali Canon Canon Pali Palm Sunday Sul y Blodau Panj Kakka Panj Kakka Panth Panth Papal Schism Sgism y Babaeth Papal States Tiroedd y Babaeth Pareto efficiency effeithlonrwydd Pareto Paris Peace Conference Cynhadledd Heddwch Paris Paris binding rhwymyn Paris Paris bindings rhwymyn Paris Parliament Act Deddf y Senedd Parliamentary Reform Act Deddf Diwygio'r Senedd Parvati Parvati Passion Dioddefaint (of Christ) Passion music cerddoriaeth y Dioddefaint Passion musics cerddoriaeth y Dioddefaint Passover Pasg Iddewig Pasteur effect effaith Pasteur Pasteur effects effaith Pasteur Patent Roll Rhôl Patent Patient's Charter Siarter y Claf Patimokkha Patimokkha Patriarchal Narratives Hanesion Patriarchaidd Pauli exclusion principle egwyddor wahardd Pauli Pauli exclusion principles egwyddor wahardd Pauli Paulinus Pawl Hen Pay As You Earn Talu Wrth Ennill Payne's blue glas Payne Payne's blues glas Payne Payne's grey llwyd Payne Peasants' Revolt Gwrthryfel y Werin Peasants' War Rhyfel y Werin Pekingese stitch pwyth Pekin Pekingese stitches pwyth Pekin Penal Code Cod Penyd Penny Black stamp du ceiniog Penrhyn lockouts argyfyngau cau allan y Penrhyn Pentecost Pentecost Pentecostal Pentecostal Pentecostal Pentecostalaidd People's Charter Siarter y Bobl Permian Permaidd Peruvian coast arfordir Periw Peruvian coasts arfordir Periw Peter Pan collar coler Peter Pan Peter Pan collars coler Peter Pan Peter Scot Ceiniogau'r Pab Peter the Great Pedr Fawr Peter the Hermit Pedr Feudwy Peter's Pence Ceiniogau Pedr Petition of Right Deiseb Iawnderau Petri dish dysgl Petri Petri dishs dysgl Petri Petty Constable Is-Gwnstabl Philip Augustus Philip Awgwstws Philip the Fair Philip Deg Philip the Handsome Philip Olygus Phillips curve cromlin Phillips Phillips curves cromlin Phillips Phillips screwdriver tyrnsgriw Phillips Phillips screwdrivers tyrnsgriw Phillips Phoney War Rhyfel Ffug Phrygian Phrygiaidd Piepowder Court Cwrt Marchnad Pilgrim Fathers Tadau Pererin Pilgrim Festivals Gwyliau'r Pererinion Pipe Roll Rhôl Siecr Plaid Cymru Plaid Cymru Pleistocene Pleistosen Pluto Plwton PoS programme of study RhA rhaglen astudio Poet Laureate Bardd y Brenin Poisson distribution dosraniad Poisson Poisson distributions dosraniad Poisson Police and Criminal Evidence Act Deddf Heddlu a Thystiolaeth Droseddol Polish Corridor Coridor Pwylaidd Poor Law Amendment Act Deddf Newydd y Tlodion Popish Plot Cynllwyn Pabaidd Portland cement sment Portland Portland cements sment Portland Portuguese Portiwgaleg (language) Portuguese Portiwgalydd (person) Post Graduate Certificate of Education Tystysgrif Addysg i Raddedigion (PGCE) Post Office box blwch Swyddfa'r Post Post Office boxes blwch Swyddfa'r Post Pozidrive screw sgriw Pozidrive Pozidrive screwdriver tyrnsgriw Pozidrive Pozidrive screwdrivers tyrnsgriw Pozidrive Pozidrive screws sgriw Pozidrive Pragmatic Sanction Datganiad Pragmatig Pre-Raphaelite Cyn-Raffaelaidd Pre-Raphaelite Cyn-Raffaeliad Pre-Raphaelite Brotherhood Brawdoliaeth y Cyn-Raffaeliaid Premium Bond Bond Premiwm Premonstratensians Canoniaid Premonstratensiaidd Prerogative Court Llys Uchelfraint Presbyterian Presbyteraidd Presbyterian Presbyteriad Press Complaints Commission Comisiwn Cwynion y Wasg Prices Act Deddf Prisiau Primitive Methodism Methodistiaeth Gyntefig Prince Consort Tywysog Cydweddog Prince Elector Etholydd Tywysogol Prince Regent Rhaglyw Dywysog Princess Elizabeth's Fancy Ffansi Lisa Principal Component Analysis Dadansoddiad Prif Gydrannau Privy Chamber Siambr Gyfrin Privy Council Cyfrin Gyngor Privy Purse Pwrs Cyfrin Privy Seal Sêl Gyfrin Probate Court Llys Profiant Process Theology Diwinyddiaeth Proses Programme Evaluation and Review Technique Techneg Gwerthuso ac Adolygu Rhaglen (PERT) Propagation of the Gospel Taenu'r Efengyl Protection of Sea Life Act Deddf Gwarchod Bywyd y Môr Protestant Protestannaidd Protestant Protestant Protestant Ascendancy Goruchafiaeth Brotestannaidd Protestant Reformation Diwygiad Protestannaidd Protestant Succession Olyniaeth Brotestannaidd Protestant denomination enwad Protestannaidd Protestant denominations enwad Protestannaidd Protestant establishment sefydliad Protestannaidd Protestant establishments sefydliad Protestannaidd Protestant settlement ardrefniant Protestannaidd Protestant settlements ardrefniant Protestannaidd Protestantism Protestaniaeth Provençal Profensaidd Provençal Profensaleg (language) Provençal Profenswr (person) Provençals Profensaleg (language) Provençals Profenswr (person) Provisions of Clarendon Gosodiadau Clarendon Provisions of Oxford Gosodiadau Rhydychen Provisions of Westminster Gosodiadau San Steffan Provisors Act Deddf Atal Enwebu Prussian Prwsiad Prussian Prwsiaidd Prussian blue glas Prwsia Prussian blues glas Prwsia Public Health Act Deddf Iechyd Cyhoeddus Public Record Office Archifdy Gwladol Pure Land Tir Pur Puritan Choir Carfan Biwritanaidd Puritan Revolution Chwyldro Piwritanaidd Pyrex ware llestri Pyrex Pyroceram llestri Pyroceram Pyrocil llestri Pyrocil Pythagoras Pythagoras Pythagoras theorem theorem Pythagoras Pythagoras theorems theorem Pythagoras QWERTY keyboard bysellfwrdd QWERTY QWERTY keyboards bysellfwrdd QWERTY Quaker Crynwr Quakerism Crynwriaeth Quarter Sessions Llys Chwarter Queen Consort Brenhines Gydweddog Queen's Bench Division Adran Mainc y Frenhines Qur'an Qur'an Qur'ans Qur'an R.P.M. cylchdroeon y funud (revolutions per minute) Rabbinical Judaism Iddewiaeth Rabbinaidd Race Relations Act Deddf Cysylltiadau Hiliol Radha Radha Rama Rama Ramadan Ramadan Ramayana Ramayana Rastafarian Rastaffariad Rastafarianism Rastaffariaeth Rational Dissenter anghydffurfiwr rhesymol Rebecca riots terfysgoedd Beca Receiver General Rhysyfwr Cyffredinol Reciprocity of Duties Act Deddf Cydbwyso Tollau Reform Act Deddf Ddiwygio Reform Bill Mesur Diwygio Reform Bill Crisis Argyfwng y Mesur Diwygio Reform Jew Iddew Diwygiedig Reformation Diwygiad Protestannaidd Registry Office Swyddfa Gofrestru Reich Concordat Concordat y Reich Reichstag Fire Tân y Reichstag Reinsurance Treaty Cytundeb Ailyswirio Remembrance Day Dydd y Cofio Renaissance Dadeni Rent Act Deddf Rhenti Representation of the People Act Deddf Cynrychiolaeth y Bobl Republican Party Plaid Weriniaethol Resistance Byddin Gêl (in France, World War II) Reverse Polish Notation Nodiant Cil-Bwyl Revolt of the Camisards Gwrthryfel y Camisardiaid Richard the Lionheart Rhisiart Lewgalon Right Ascension Esgyniad Cywir (RA) Ringers solution hydoddiant Ringer Ringers solutions hydoddiant Ringer Riot Act Deddf Terfysg Roman Rhufeinig Roman Rhufeinwr Roman Catholic Church Eglwys Babyddol Roman Church Eglwys Rufain Roman Empire Ymerodraeth Rufeinig Roman Inquisition Chwilys Rhufain Roman Law Cyfraith Rufain Roman alphabet gwyddor Rufeinig Roman alphabets gwyddor Rufeinig Roman town house tŷ tref Rhufeinig Roman town houses tŷ tref Rhufeinig Romanism Pabyddiaeth Romanization Rhufeinio Romanize Rhufeinio Romantic period cyfnod Rhamantaidd Romantic periods cyfnod Rhamantaidd Rome Scot Ceiniogau'r Pab Root & Branch Petition Deiseb Wreiddyn a Changen Roundhead Pengrynwr Royal Academy of Arts,The Academi Frenhinol y Celfyddydau Royal Cambrian Academy of Arts Academi Gelf Frenhinol Cymru Royal Society of Mines Cymdeithas Frenhinol y Mwyngloddiau Rump Parliament Senedd y Gweddill Russification Rwsianeiddio SACRE Standing Advisory Council for Religious Education CYSAG Cyngor Ymgynghorol Sefydlog Addysg Grefyddol SCAA School Curriculum and Assessment Authority ACAY Awdurdod Cwricwlwm ac Asesu Ysgolion SDP-Liberal Alliance Cynghrair y Rhyddfrydwyr a'r Democratiaid Cymdeithasol SEAC School Examinations and Assessment Council CAAY Cyngor Arholiadau ac Asesu Ysgolion SI unit uned SI SI units uned SI Sabath Shabbat (in technical Jewish usage) Sabbatarianism Sabathyddiaeth Sabbath Sabath (Jewish) Sack of Rome Anrhaith Rhufain Saint Augustine Awstin Sant Saint David's Day Dydd Gŵyl Dewi Saint George's Channel Sianel San Siôr Saint James Sant Iago Saint John Sant Ioan Saint Patrick Sant Padrig Salab Salab Sale of Goods Act Deddf Gwerthu Nwyddau Salic Law Cyfraith Salig Salvation Army Byddin yr Iachawdwriaeth Salvationist aelod o Fyddin yr Iachawdwriaeth Sangha Sangha Saracen Sarasen Sat Nam Sat Nam Saturn Sadwrn Sawm Sawm Saxon Sacson Saxon Sacsonaidd Saxon place name enw lle Sacsonaidd Saxon place names enw lle Sacsonaidd Scandinavian Union Undeb Llychlyn Schism Act Deddf Sgism Schlieffen Plan Cynllun Schlieffen Schmalkaldic League Cynghrair Schmalkalden Schmitt Trigger Triger Schmitt Schmitt inverter gwrthdröydd Schmitt Schmitt inverters gwrthdröydd Schmitt Schumpeter's theory of creative destruction damcaniaeth distryw creadigol Schumpeter Schwann cell cell Schwann Schwann cells cell Schwann Scientific Revolution Chwyldro Gwyddonol Scotch Baptist Bedyddiwr Albanaidd Scotch Cattle Teirw Scotch Scotch glue glud Scotch Scotch glues glud Scotch Scotch snap clec Sgotaidd Scotch snaps clec Sgotaidd Scramble for Africa Ymgiprys am Affrica Sea Beggars Cardotwyr y Môr Second Socialist International Working-Men's Association Ail Gymdeithas Sosialaidd Ryngwladol y Gweithwyr Second World War Ail Ryfel Byd Secret Ballot Act Deddf y Bleidlais Gudd Secretary of State for Education Ysgrifennydd Gwladol dros Addysg Secretary of State for Wales Ysgrifennydd Gwladol Cymru Security Council Cyngor Diogelwch Seditious Meetings Act Deddf Cyfarfodydd Terfysglyd Seditious Publications Act Deddf Cyhoeddiadau Terfysglyd Seger cone côn Seger Seger cones côn Seger Selective Employment Tax Treth Gyflogi Dethol (SET) Self-Denying Ordinance Deddf Hunanymwadiad Semitism Semitiaeth Septennial Act Deddf Seithmlwydd Severn bore eger Hafren Severn bores eger Hafren Sex Discrimination Act Deddf Gwahaniaethu ar Sail Rhyw Sex Disqualification Removal Act 1919 Deddf Dileu Anghymwysterau Rhyw 1919 Sex Disqualification Removal Act 1919s Deddf Dileu Anghymwysterau Rhyw 1919 Shahadah Shahadah Shaivism / Śaivism Shaiviaeth / Śaiviaeth Shaivism / Śaivisms Shaiviaeth / Śaiviaeth Shaker Siglwr Shari'ah Shari'ah Shari'ahs Shari'ah Shavuot Shavuot Sheffield plate arian Sheffield Sheriff's Tourn Llys y Siryf Shi'ah Shi'ah Shi'ahs Shi'ah Shimbel Index Indecs Shimbel Ship Money Treth Longau Shiva / Śiva Shiva / Śiva Shiva / Śivas Shiva / Śiva Shiva Nataraja Shiva Nataraja Shudra / Śudra Shudra / Śudra Shudra / Śudras Shudra / Śudra Sicilian circle cylch Sisili Sicilian circles cylch Sisili Sikh Sikh Sikh sikhaidd Sikh identity hunaniaeth y Sikhiaid Sikhism Sikhiaeth Silurian Silwraidd Simmonds nut nyten Simmonds Simmonds nuts nyten Simmonds Simpson's rule dull Simpson Simpson's rules dull Simpson Single Award Dyfarniad Sengl Singspiel Singspiel Sir Syr (title of nobleman) Sistine Chapel Capel Sistin Sita Sita Sitka spruce pyrwydden Sitca Sitka spruces pyrwydden Sitca Social Democrat Sosialydd Democrataidd Social Democratic Party Plaid y Democratiaid Cymdeithasol (SDP) Socialist Party Plaid Sosialaidd Society of Christ Cymdeithas yr Iesu Society of Friends Cymdeithas y Cyfeillion Solemn League & Covenant Cynghrair Sanctaidd a Chyfamod Solicitor General Cyfreithiwr Cyffredinol Solicitors Act 1971 Deddf y Twrneiod 1971 Solicitors Act 1971s Deddf y Twrneiod 1971 Solidarity Mudiad Solidarność (movement) South Sea Bubble Swigen Môr y De South Wales Miner's Federation Ffederasiwn Glowyr De Cymru Spanish Fury Cynddaredd y Sbaenwyr Spanish Inquisition Chwilys Sbaen Spanish Main Môr Sbaenaidd Spanish ulcer aflwydd Sbaenaidd, yr Spanish ulcers aflwydd Sbaenaidd, yr Spartacist revolt gwrthryfel y Spartaciaid Spartacist revolts gwrthryfel y Spartaciaid Spearman rank correlation coefficient cyfernod cydberthyniad rhestrol Spearman Spearman rank correlation coefficients cyfernod cydberthyniad rhestrol Spearman Special Areas Act Deddf yr Ardaloedd Arbennig Sports Council Cyngor Chwaraeon Square Dance Dawns Sgwâr St John Ambulance Ambiwlans Sant Ioan St Louis Louis Sant Stalinist Stalinydd Stamp Act Deddf Stamp Standard Assessment Task Tasg Asesu Safonol (SAT) Standard Temperature and Pressure Tymheredd a Gwasgedd Safonol (STP) Standard Tests and Assessment Implementation Research Ymchwil Gweithredu Profion ac Asesu Safonol (STAIR) Star Chamber Siambr y Seren Star of David Seren Dafydd State Department Adran Wladol Stations of the Cross Ffordd y Groes (of service) Stations of the Cross Gorsafoedd y Groes (of places) Statute of Proclamations Statud Proclamasiwn Statute of Retainers Statud Gwŷr ar Gadw Statute of Rhuddlan Statud Rhuddlan Statute of Uses Statud Defnyddiau Statute of Wales Statud Cymru Statute of Westminster Statud Westminster Steiner philosophy athroniaeth Steiner Stevenson screen sgrin Stevenson Stevenson screens sgrin Stevenson Stone Age Oes y Cerrig Stonehenge Côr y Cewri Straits Convention Cytundeb y Culfor Strategic Intent for Health Services in Wales Bwriad Strategol Gwasanaethau Iechyd Cymru Strathspey step step Strathspey Strathspey steps step Strathspey Stuarts Stiwartiaid Submission of the Clergy Ymostyngiad y Glerigaeth Subsidy Roll Rhôl Cymorth Succession States Gwladwriaethau'r Olyniaeth Sufi Sufi Sukkot Sukkot Suleiman the Magnificent Swleiman Ysblennydd Sultan Swltan Sunday school ysgol Sul Sunday schools ysgol Sul Sunni Sunni Superwash wool gwlân 'Superwash' Superwash wools gwlân 'Superwash' Supplication against the Ordinaries Ymbil yn erbyn yr Ordinariaid Supply of Goods Act Deddf Cyflenwi Nwyddau Supreme Court Llys Goruchaf Supreme Court of Judicature Goruchaf Lys y Farnwriaeth Supreme Governor Uchaf-Lywodraethwr Supreme Head Goruchaf Ben Supreme Soviet Sofiet Goruchaf Surform blade llafn Surform Surform blades llafn Surform Swede Swediad Swedish Swedaidd Swedish Swedeg (language) Swedish iron haearn Sweden Swedish irons haearn Sweden Swiss darn craith Swisaidd Swiss darns craith Swisaidd T test prawf T T tests prawf T T-halving joint uniad haneru T T-halving joints uniad haneru T T-hinge colfach T T-hinges colfach T T-shaped stretcher estynnwr ffurf T T-shaped stretchers estynnwr ffurf T T-shirt crys T T-shirts crys T T-slot agen T T-slots agen T T.P.I. dannedd i'r fodfedd (teeth per inch) TEC Training and Enterprise Councils Cynghorau Hyfforddi a Menter TGAT Task Group on Assessment and Testing GAP Gweithgor ar Asesu a Phrofi TRIST TVEI Related In-Service Training HMS-ADAG Hyfforddiant Mewn Swydd yn gysylltiedig ag ADAG TV listings amserlenni teledu TVEI Technical Vocational Education Initiative ADAG Addysg Dechnegol a Galwedigaethol Taborites Taboriaid Taff Vale Case Achos Dyffryn Taf Talmud Talmud Taoist Taoaidd Taoist Taoydd Tartar Tartar Tartar Tartaraidd Temporary Bench Mark Meincnod Dros Dro (TBM) Tenakh Tenakh Tenth Penny Y Ddegfed Geiniog Terylene Terylene Test Act Deddf Brawf Test and Corporation Acts Deddfau Prawf a Chorfforaeth Theatine Theatiad Theravada Theravada Thevenin's theorem theorem Thevenin Thevenin's theorems theorem Thevenin Third Estate y Drydedd Stad Third Reich Trydedd Reich Third Republic Trydedd Weriniaeth Thirteen Articles Tair Erthygl ar Ddeg Thirty Nine Articles Deugain Erthygl Namyn Un Thirty Years War Rhyfel Deng Mlynedd ar Hugain Thomas the Tank Engine Tomos y Tanc Thomism Tomistiaeth Thomistic Tomistig Three Resolutions Tri Phenderfyniad (1629) Time of Troubles Cyfnod y Cynnwrf Tinbergen's rule rheol Tinbergen Tinbergen's rules rheol Tinbergen Tironian Tironiad Tithe Commutation Act Deddf Cyfnewid y Degwm Tithe War Rhyfel y Degwm Toleration Act Deddf Goddefiad Tolpuddle Martyrs Merthyron Tolpuddle Tonk strip stribed Tonk (shelf) Tonk strips stribed Tonk (shelf) Tonk's fitting ffitiad Tonk Tonk's fittings ffitiad Tonk Torah Torah Tory Party Plaid Dorïaidd Tory reform diwygiad y Torïaid Tory reforms diwygiad y Torïaid Total Station Gweithfan Gyfansawdd Town and Country Planning Act Deddf Cynllunio Gwlad a Thref Tractarianism Tractariaeth Trade Descriptions Act Deddf Disgrifiadau Masnach Trade Disputes Act Deddf Anghydfodau Undebol Trade Union Congress Cyngres yr Undebau Llafur Trades Union Amendment Act Deddf Newid yr Undebau Llafur Trading Standards Department Adran Safonau Masnachu Transistor-Transistor logic rhesymeg Transistor-Transistor Transistor-Transistor logics rhesymeg Transistor-Transistor Treachery of the Blue Books Brad y Llyfrau Gleision Treason of the Blue Books Brad y Llyfrau Gleision Treasury Bill Bil Trysorlys Triassic Triasig Tribunals and Inquiries Act Deddf Tribiwnlysoedd ac Ymchwiliadau Tridentine Tridentaidd Triennial Act Deddf Deirblwydd Trinity Trindod Tripartite Indenture Cytundeb Tridarn Triple Alliance Cynghrair Driphlyg Tripoli compound sebon Tripoli Tripoli compounds sebon Tripoli Tropic of Cancer Trofan Cancr Tropic of Capricorn Trofan Capricorn Trotskyism Trotscïaeth Trotskyist Trotscïad Trust Territory Tiriogaeth Ymddiriedig Trustee Savings Bank Banc Cynilo Ymddiriedol Tsar of all the Russians Tsar yr holl Rwsiaid Tsardom Tsaraeth Tudor dynasty llinach y Tuduriaid Tudor rebellions gwrthryfeloedd cyfnod y Tuduriaid Tudor settlement ardrefniant Tuduraidd Tudor settlements ardrefniant Tuduraidd Tudors Tuduriaid Turk Twrc Turkish Twrcaidd Turkish Empire Ymerodraeth Twrci Turkish stitch pwyth Twrcaidd Turkish stitches pwyth Twrcaidd Twelve Articles Deuddeg Erthygl U shaped valley dyffryn ffurf U U-bend pibell U U-bends pibell U U-boat llong danfor Almaenig U-boats llong danfor Almaenig U-section trychiad U U-sections trychiad U U-shaped ar ffurf U U-shaped kitchen cegin ar ffurf U U-shaped kitchens cegin ar ffurf U U-tool erfyn U U-tools erfyn U U.S.S.R. Undeb Sofietaidd, yr U.S.S.R.s Undeb Sofietaidd, yr UCCA Cyngor Canolog ar gyfer Mynediad i'r Prifysgolion UK energy policy polisi egni'r Deyrnas Unedig UN convention on the rights of the child confensiwn yr UN ar hawliau plant Ukrainian Wcrainaidd Ukrainian Wcrainiad Ulster Loyalist Teyrngarwr Ulster Ulster Unionist Unoliaethwr Ulster Ulster Volunteer Gwirfoddolwr Ulster Ulster plantations trefedigaethau Ulster Ultra-Royalist Uchel Frenhinwr Unfair Contract Terms Act Deddf Telerau Contract Annheg Uniate Church Eglwys Uniadol Unilateral Declaration of Independence Datganiad Annibyniaeth Unochrog Union Jack Jac yr Undeb Unionist Party Plaid yr Unoliaethwyr United Brotherhood Brawdoliaeth Unedig United Irishmen Cymdeithas y Gwyddelod Unedig United Kingdom Teyrnas Unedig, y Deyrnas Unedig (as defined in law) United Nations Cenhedloedd Unedig United Nations International Children's Fund Cronfa Ryngwladol Plant y Cenhedloedd Unedig (UNICEF) United Reformed Church Eglwys Ddiwygiedig Unedig University Tests Acts Deddfau Prawf y Prifysgolion Unlawful Oaths Act Deddf Llwon Anghyfreithlon Unsolicited Goods & Services Act Deddf Nwyddau a Gwasanaethau nas Archebwyd Uranus Wranws Utopia Iwtopia Utraquism Wtraciaeth Utraquist Wtracwr (of person) V base gwaelod V V bases gwaelod V V blocks and clamps blociau V a chlampiau V pulley pwli V V-cut toriad V V-cuts toriad V V-joint uniad V V-joints uniad V V-section toriad V V-sections toriad V V-shape ffurf V V-shaped ar ffurf V V-shapes ffurf V V-tool erfyn V V-tools erfyn V V-weapons arfau V Vaishnavism / Vaisnavism Vaishnaviaeth / Vaisnaviaeth Vaishya / Vaisya Vaishya / Vaisya Vandyke brown brown Vandyke Vandyke browns brown Vandyke Vandyke crystals grisialau Vandyke Vandyke smocking smocwaith Vandyke Vandyke smockings smocwaith Vandyke Vaseline Vaseline Vassa Vassa Vatican Fatican Vauclusian spring tarddell Vaucluse Vauclusian springs tarddell Vaucluse Veblen goods nwyddau Veblen Venetian Fenisaidd Venetian red coch Fenis Venetian reds coch Fenis Venn diagram diagram Venn Venn diagrams diagram Venn Venturi meter mesurydd Venturi Venturi meters mesurydd Venturi Venus Gwener Versailles settlement ardrefniant Versailles Versailles settlements ardrefniant Versailles Vestiarian Controversy Ymryson yr Urddwisgoedd Victorian Fictoraidd Victorian middle-class family teulu dosbarth canol Fictoraidd Victorian terraced house tŷ teras Fictoraidd Victorian terraced houses tŷ teras Fictoraidd Vietnam Fietnam Viking Llychlynnaidd Viking Llychlynnwr Vinaya Vinaya Vishnu / Visnu Vishnu / Visnu Viyella Viyella Vulgate Fwlgat Vulgate Bible Beibl Fwlgat Vygotskian tutorial tiwtorial Vygotskian Vygotskian tutorials tiwtorial Vygotskian WISE Women in Science and Engineering Merched mewn Gwyddoniaeth a Pheirianneg WJEC Welsh Joint Education Committee CBAC Cyd-bwyllgor Addysg Cymru WOED Welsh Office Department of Education Adran Addysg y Swyddfa Gymreig Waheguru / Vahiguru Waheguru / Vahiguru Wailing Wall Mur Wylofain Waldenses Waldensiaid Waldensian Waldensaidd Wales Herald of Arms Extraordinary Herodr Arbenigol Cymru Wales regions rhanbarthau Cymru Wallace's Line Llinell Wallace Wallerian degeneration ymddatod Walleraidd War of Austrian Succession Rhyfel Olyniaeth Awstria War of League of Augsburg Rhyfel Cynghrair Augsburg War of Polish Succession Rhyfel Olyniaeth Pwyl War of Spanish Succession Rhyfel Olyniaeth Sbaen Warrington pattern hammer morthwyl patrwm Warrington Warrington pattern hammers morthwyl patrwm Warrington Wars of the Roses Rhyfeloedd y Rhosynnod Washita oilstone carreg hogi Washita Washita oilstones carreg hogi Washita Water of Ayr stone carreg Ayr Weights & Measures Act Deddf Pwysau a Mesurau Welch Whim Chwiw Gymreig Welsh Bible Beibl Cymraeg Welsh Church Temporalities Act Deddf Eiddo Bydol Eglwys Cymru Welsh Folk Dance Society Cymdeithas Ddawns Werin Cymru Welsh League of Youth Urdd Gobaith Cymru Welsh National Board Bwrdd Cenedlaethol Cymru (WNB) Welsh Nationalist Party Plaid Genedlaethol Cymru Welsh Office Swyddfa Gymreig Welsh Trust Ymddiriedolaeth Gymreig Welsh folk dancing dawnsio gwerin Cymreig Welsh gentry bonedd Cymreig Welsh harp telyn Gymreig Welsh harps telyn Gymreig Welsh language policy polisi Cymraeg Welsh law Cyfraith Hywel Welsh laws Cyfraith Hywel Welsh quilting cwiltio Cymreig Welsh wool gwlân Cymru Welsh wools gwlân Cymru Welsh-medium cyfrwng Cymraeg Welsh-medium education addysg cyfrwng Cymraeg Welsh-medium educations addysg cyfrwng Cymraeg Welshness Cymreictod Wendicote loom gwŷdd Wendicote Wendicote looms gwŷdd Wendicote Wendy loom gwŷdd Wendy Wendy looms gwŷdd Wendy Wesleyan Weslead Wesleyan Methodism Methodistiaeth Wesleaidd Wesleyanism Wesleaeth West Bank Glan Orllewinol Western religions crefyddau’r Gorllewin Western roll rhôl y Gorllewin (in gymnastics) Western rolls rhôl y Gorllewin (in gymnastics) Western values gwerthoedd y Gorllewin Wharton's jelly jeli Wharton Wheatstone's bridge circuit cylched pont Wheatstone Wheatstone's bridge circuits cylched pont Wheatstone Whig Chwig Whig Chwigaidd Whig Party Plaid y Chwigiaid White House Tŷ Gwyn Whitsun Sulgwyn Whitworth thread edau Whitworth Whitworth threads edau Whitworth Wild West Gorllewin Gwyllt William of Orange Gwilym o Orange William the Conqueror Gwilym Goncwerwr William the Silent Gwilym Dawedog Winchester disk disg Winchester Winchester disks disg Winchester Winifred Gwenffrewi Witton high frequency furnace ffwrnais amledd uchel Witton Witton high frequency furnaces ffwrnais amledd uchel Witton Women's Institute Sefydliad y Merched Women's Social and Political Union Undeb Cymdeithasol a Gwleidyddol y Merched Woodruff key allwedd Woodruff Woolmark Nod Gwlân Workers' Education Association Cymdeithas Addysg y Gweithwyr (WEA) Working Families' Tax Credit Credyd Treth Teuluoedd sy'n Gweithio World Cup Cwpan y Byd World Health Organization Mudiad Iechyd y Byd (WHO) World Trade Organisation WTO Cyfundrefn Masnach y Byd WTO World Wide Web We Fyd-eang, y X-efficiency effeithlonrwydd-X Yahweh Yahweh Yarrel blenny llyfrothen Yarrel Young Italy Eidal Ifanc (movement) Zakat Zakat Zener diode deuod Zener Zener diodes deuod Zener Zone of Proximal Development Parth Datblygu Procsimol a cappella a cappella a posteriori a posteriori a priori a priori a.c. generator generadur cerrynt eiledol a.c. generators generadur cerrynt eiledol abacus abacws abandon gadael abandoned meander ystumllyn abandoned meanders ystumllyn abasement darostyngiad abasements darostyngiad abaxial allechelinol abbacy abadaeth abbess abades abbey abaty abbot abad abbots abad abbreviate talfyrru abbreviation byrfodd (in typography) abbreviation talfyriad (=abbreviated form) abbreviations byrfodd (in typography) abbreviations talfyriad (=abbreviated form) abc behaviour ymddygiad abc abc behaviours ymddygiad abc abc procedure dull gweithredu abc abc procedures dull gweithredu abc abdicate ildio'r goron (the crown) abdication ymddiorseddiad abdication crisis argyfwng yr ymddiorseddiad abdications ymddiorseddiad abdomen abdomen abdomens abdomen abdominal abdomenol abdominal cavity ceudod abdomenol abdominal exercise ymarfer abdomen abdominal exercises ymarfer abdomen abducent nerve nerf abdwcent abducent nerves nerf abdwcent aberrant gwyrol aberrant species rhywogaeth wyrol aberration egwyriant aberrations egwyriant abhorrer ffieiddiwr abhorrers ffieiddiwr ability gallu ability group grŵp gallu ability grouping grwpio yn ôl gallu ability groups grŵp gallu ability range ystod gallu ability ranges ystod gallu ability test prawf gallu ability tests prawf gallu abiotic anfiotig abjuration ymwadiad ar lw abjurations ymwadiad ar lw abjure ymwadu ar lw ablate abladu ablation abladiad ablation till til abladu ablation tills til abladu ablations abladiad able galluog ablution golchiad ablutions golchiad abnormal annormal abnormal data data annormal abnormality annormaledd abolish dileu abolition dilead abolition of slavery dileu caethwasiaeth abolitions dilead abomasum abomaswm abomasums abomaswm aboriginal cynfrodorol aboriginal art celfyddyd gynfrodorol aboriginal arts celfyddyd gynfrodorol aborigine cynfrodor aborigines cynfrodor abort erthylu (a fetus) abortifacient cyffur erthylu abortifacients cyffur erthylu abortion erthyliad abortions erthyliad abozzo abozzo (sketch) abrade sgrafellu abraded sgrafellog abrasion crafiad (on skin) abrasion sgrafelliad (on land) abrasion sgraffiniad (on metal etc) abrasions crafiad (on skin) abrasions sgrafelliad (on land) abrasions sgraffiniad (on metal etc) abrasive sgraffiniol abrasive sgraffinydd abrasive action arwaith sgraffinio abrasive actions arwaith sgraffinio abrasive faults beiau sgraffinio abrasive grades graddau sgraffinio abrasive paper papur sgraffinio abrasive papers papur sgraffinio abrasive sheet dalen sgraffinio abrasive sheets dalen sgraffinio abrasives sgraffinydd abrogate diddymu abrupt cadence diweddeb swta abrupt cadences diweddeb swta abscess crawniad abscisic acid asid absgisig abscisic acids asid absgisig abscissa absgisa abscissas absgisa abscission absgisedd abscission layer haenen absgisaidd abscission layers haenen absgisaidd abscissions absgisedd abseil abseil abseil abseilio abseils abseil absence absenoldeb absence of light diffyg golau absences absenoldeb absent absennol absentee absenolwr absenteeism absenoliaeth absenteeisms absenoliaeth absentees absenolwr absolute absoliwt absolute Oneness of God Undod absoliwt Duw absolute address cyfeiriad absoliwt absolute advantage mantais lwyr absolute advantages mantais lwyr absolute alcohol alcohol pur absolute alcohols alcohol pur absolute humidity lleithder absoliwt absolute monarchy brenhiniaeth absoliwt absolute music cerddoriaeth absoliwt absolute musics cerddoriaeth absoliwt absolute pitch traw cynhenid absolute pitches traw cynhenid absolute ruler rheolwr absoliwt absolute rulers rheolwr absoliwt absolute scale of temperature graddfa tymheredd absoliwt absolute spectrum sbectrwm absoliwt absolute spectrums sbectrwm absoliwt absolute value gwerth absoliwt absolute values gwerth absoliwt absolute zero sero absoliwt absolution maddeuant absolutions maddeuant absolutism absoliwtiaeth absolutisms absoliwtiaeth absolved soul enaid rhydd absolved souls enaid rhydd absorb amsugno absorbance amsugnedd absorbances amsugnedd absorbed stain staen wedi'i amsugno absorbed stains staen wedi'i amsugno absorbency amsugnedd absorbent amsugnol absorbent amsugnydd absorbent fabric ffabrig amsugnol absorbent fabrics ffabrig amsugnol absorbent material defnydd amsugnol absorbent materials defnydd amsugnol absorbent pad pad amsugnol absorbent pads pad amsugnol absorbent paper papur amsugnol absorbent papers papur amsugnol absorbents amsugnydd absorber amsugnydd absorbers amsugnydd absorption amsugniad absorption band band amsugno absorption bands band amsugno absorption coefficient cyfernod amsugno absorption coefficients cyfernod amsugno absorption costing costio amsugno absorption spectrum sbectrwm amsugno absorption spectrums sbectrwm amsugno absorptions amsugniad absorptive cell cell amsugno absorptive cells cell amsugno abstinence ymataliad abstinences ymataliad abstract alldynnu (=take from) abstract crynhoi (=summarize) abstract crynodeb (=summary) abstract haniaeth (=intangible thing) abstract haniaethol abstract haniaethu (=consider abstractly) abstract art celfyddyd haniaethol abstract arts celfyddyd haniaethol abstract concept cysyniad haniaethol abstract concepts cysyniad haniaethol abstract design cynllun haniaethol (of plan) abstract design dyluniad haniaethol (of drawing) abstract designs cynllun haniaethol (of plan) abstract designs dyluniad haniaethol (of drawing) abstract expressionism mynegiadaeth haniaethol abstract expressionisms mynegiadaeth haniaethol abstract music cerddoriaeth haniaethol abstract musics cerddoriaeth haniaethol abstract painting paentiad haniaethol (of picture) abstract painting peintio haniaethol (of process or art) abstract paintings paentiad haniaethol (of picture) abstract pattern patrwm haniaethol abstract patterns patrwm haniaethol abstraction haniaeth abstractions haniaeth abstracts crynodeb (=summary) abstracts haniaeth (=intangible thing) absurd afresymol abundance cyflenwad (percentage or fraction) abundance digonedd (=plenty) abundances cyflenwad (percentage or fraction) abundances digonedd (=plenty) abuse cam-drin (=ill-treat) abuse camddefnydd (=misuse) abuse camddefnyddio (=misuse) abuse camdriniaeth (=ill-treatment) abuses camddefnydd (=misuse) abuses camdriniaeth (=ill-treatment) abut ffinio â (of lands, premises) abut ymylu ar (in general) abutment ateg (in general) abutment ategwaith (architectural) abutments ateg (in general) abutments ategwaith (architectural) abysmal affwysol abyss affwys abyssal deposits dyddodion affwys (of the ocean) academic academaidd academic counselling cynghori academaidd academic dress gwisg academaidd academic historian hanesydd academaidd academic historians hanesydd academaidd academic infrastructure isadeiledd academaidd academic infrastructures isadeiledd academaidd academic registrar cofrestrydd academaidd academic registrars cofrestrydd academaidd academic standard safon academaidd academic standards safon academaidd academic success llwyddiant academaidd academic year blwyddyn academaidd academic years blwyddyn academaidd academician academydd academicians academydd academicism academiaeth academicisms academiaeth academy academi academy board bwrdd academi academy boards bwrdd academi academy figure ffigur academi academy figures ffigur academi acanthus carving cerfiad acanthws acanthus carvings cerfiad acanthws accelerate cyflymu accelerated cyflymedig accelerated course cwrs carlam accelerated courses cwrs carlam accelerated freeze dried sychrewedig cyflym accelerated freeze drying sychrewi cyflym accelerated programme rhaglen garlam accelerated programmes rhaglen garlam accelerating cavity ceudod cyflymu accelerating field maes cyflymu accelerating fields maes cyflymu accelerating potential difference gwahaniaeth potensial cyflymu accelerating potential differences gwahaniaeth potensial cyflymu acceleration cyflymiad acceleration / time diagram diagram cyflymiad / amser acceleration / time diagrams diagram cyflymiad / amser acceleration due to gravity cyflymiad disgyrchiant acceleration graph graff cyflymiad acceleration graphs graff cyflymiad accelerations cyflymiad accelerator cyflymydd accelerator nerve nerf cyflymu accelerator nerves nerf cyflymu accelerator theory damcaniaeth cyflymu accelerators cyflymydd accent acen accent acennu accented acennog accented passing note nodyn camu acennog accented passing notes nodyn camu acennog accents acen accept derbyn acceptance derbyniad acceptance testing profi derbyniad acceptances derbyniad acceptor derbynnydd acceptor atom atom derbyn acceptor atoms atom derbyn acceptor circuit cylched dderbyn acceptor circuits cylched dderbyn acceptors derbynnydd access cael at (=get to) access cyrchiad (=the action of gaining access to a file, data etc) access cyrchu (a file, data etc) access hawl gweld (=the right to reach or see) access mynediad (=a way of approaching) access course cwrs mynediad access courses cwrs mynediad access information cyrchu'r wybodaeth access privilege cyrchfraint access privileges cyrchfraint access road ffordd fynediad access roads ffordd fynediad access staircase grisiau mynediad access time amser cyrchu (in computing) access times amser cyrchu (in computing) accessibility hygyrchedd accessibility index mynegai hygyrchedd accessibility indexes mynegai hygyrchedd accessibility of task hygyrchedd tasg accessible hygyrch accessory ategol accessory ategolyn (of tools etc) accessory cyfwisg (of dress) accessory bone asgwrn atodol accessory bones asgwrn atodol accessory bud blaguryn atodol accessory buds blaguryn atodol accessory course cwrs atodol accessory courses cwrs atodol accessory nerve nerf atodol accessory nerves nerf atodol acciaccatura acciaccatura acciaccaturas acciaccatura accident damwain accident and emergency damwain ac argyfwng accident and emergency department adran ddamweiniau ac achosion brys accident and emergency departments adran ddamweiniau ac achosion brys accidental hapnod (=musical sign) accidentals hapnod (=musical sign) accidents anhanfodion (in theology) accidents damwain acclimatization ymaddasiad acclimatizations ymaddasiad acclimatize ymaddasu accommodate cymhwyso (=adapt) accommodate lletya (=provide lodging for) accommodate ymgymhwyso (=adapt) accommodation cymhwysiad (=adaptation) accommodation llety (=place to live) accommodation ymgymhwysiad (of lens, of oneself) accommodations cymhwysiad (=adaptation) accommodations llety (=place to live) accommodations ymgymhwysiad (of lens, of oneself) accompanied canon canon â chyfeiliant accompanied canons canon â chyfeiliant accompanied fugue ffiwg â chyfeiliant accompanied fugues ffiwg â chyfeiliant accompaniment cyfeiliant (with music) accompaniment cyfwyd (to food) accompaniments cyfeiliant (with music) accompaniments cyfwyd (to food) accompanist cyfeilydd (with music) accompanists cyfeilydd (with music) accompany cyfeilio (with music) accompany mynd gyda (=go with) accomplishment cyflawniad (=fulfilment of task) accomplishment llwyddiant (=thing done) accomplishments cyflawniad (=fulfilment of task) accomplishments llwyddiant (=thing done) accordance of summit levels cyfuchedd copaon accordant cyfuwch according to yn unol â (=in a manner corresponding to) according to yn ôl (=as stated by) according to weighting yn ôl y pwysoli accordingly felly (=therefore) accordingly yn unol â hynny (=as required) accordion acordion accordion pleating pletio acordion accordions acordion account adroddiad (=report) account cyfrif (in bank etc) account disgrifiad (=description) account for rhoi cyfrif am account name enw'r cyfrif account names enw'r cyfrif accountability atebolrwydd accountable atebol (to) accountancy cyfrifeg accountant cyfrifydd accountants cyfrifydd accounting cost cost gyfrifyddol accounting costs cost gyfrifyddol accounting system system gyfrifydda accounting systems system gyfrifydda accounts adroddiad (=report) accounts cyfrif (in bank etc) accounts disgrifiad (=description) accounts clerk clerc cyfrifon accounts clerks clerc cyfrifon accredit achredu accreditation achrediad accreditation of prior learning achredu dysgu blaenorol accreditation procedure trefn achredu accreditation procedures trefn achredu accreditations achrediad accretion croniant accretions croniant accrued interest llog cronedig accrued interests llog cronedig acculturation goddiwylliannu accumulate cronni accumulated temperature tymheredd cronedig accumulated temperatures tymheredd cronedig accumulation croniad accumulations croniad accumulative cronnol accumulator croniadur accumulators croniadur accuracy cywirdeb (=correctness) accuracy manwl gywirdeb (=exact precision) accuracy of the performance cywirdeb y perfformiad accurate cywir (=correct) accurate manwl gywir (=exactly precise) accurate record cofnod cywir accurate records cofnod cywir accurate shape siâp cywir accurate shapes siâp cywir accurate size maint cywir accurate sizes maint cywir acellular anghellog acetabular asetabwlaidd acetabulum asetabwlwm acetabulums asetabwlwm acetal asetal acetal resin resin asetal acetal resins resin asetal acetals asetal acetate asetad acetate cellulose cellwlos asetad acetate celluloses cellwlos asetad acetate sheet asetyn acetate sheets asetyn acetates asetad acetic asetig acetic acid asid asetig acetic acids asid asetig acetone aseton acetones aseton acetyl asetyl acetyl CoA asetyl CoA acetylation asetyleiddio acetylcholine asetylcolin acetylcholines asetylcolin acetylcholinesterase asetylcolinesteras acetylcholinesterases asetylcolinesteras acetylene asetylen acetylene welding weldio asetylen acetylenes asetylen acetyls asetyl achene achen achenes achen achieve cyflawni (=accomplish or carry out) achieve ennill (=reach or attain by effort) achieve llwyddo (=be successful) achieve an objective cyflawni amcan achievement camp (=exploit) achievement cyflawniad (in National Curriculum) achievement age oed cyrhaeddiad achievement ages oed cyrhaeddiad achievement test prawf cyrhaeddiad achievement tests prawf cyrhaeddiad achievements camp (=exploit) achievements cyflawniad (in National Curriculum) achiral anghirol achromatic acromatig achromatic vision golwg acromatig achromatic visions golwg acromatig acid asid acid Bessemer process proses asid Bessemer acid base balance cydbwysedd asid bas acid base balances cydbwysedd asid bas acid bath baddon asid acid baths baddon asid acid dissociation constant cysonyn daduniad asid acid dissociation constants cysonyn daduniad asid acid dye llifyn asid acid dyes llifyn asid acid mordant mordant asid (etching) acid mordants mordant asid (etching) acid open hearth process proses asid tân agored acid pickle picl asid acid pickles picl asid acid rain glaw asid acid rains glaw asid acid resisting gwrthasid acid resisting varnish farnais gwrthasid acid resisting varnishs farnais gwrthasid acid strength cryfder asid acid strengths cryfder asid acid test prawf asid acid test ratio cymhareb prawf asid acid tests prawf asid acid-base asid-bas acid-base titration titradu asid-bas acidic asidig acidified asidiedig acidify asidio acidity asidedd acidosis asidosis acids asid acidulated asidiedig acknowledge cydnabod acme acme acme thread edau acme acme threads edau acme acmes acme acolyte acolit acolytes acolit acoustic acwstig acoustic bass bas acwstig acoustic board bwrdd acwstig acoustic boards bwrdd acwstig acoustic coupler cyplydd acwstig acoustic couplers cyplydd acwstig acoustic guitar gitâr acwstig acoustic guitars gitâr acwstig acoustic plaster plastr acwstig acoustic plasters plastr acwstig acoustics acwsteg acquire caffael acquired caffaeledig acquired dyslexia dyslecsia caffaeledig acquired dyslexias dyslecsia caffaeledig acquired feature nodwedd gaffaeledig acquired features nodwedd gaffaeledig acquired immunity imiwnedd caffaeledig acquired language iaith gaffaeledig acquired languages iaith gaffaeledig acquired word blindness dallineb geiriau caffaeledig acquiring authority awdurdod caffaelol acquisition caffaeliad (of language, skills) acquisition number rhif derbyn acquisition numbers rhif derbyn acquisitions caffaeliad (of language, skills) acquisitive society cymdeithas feddiangar acquittal rhyddfarn acquittals rhyddfarn acre erw acres erw acrobat acrobat acrobats acrobat acrocentric acrosentrig acronym acronym acronyms acronym acrosome acrosom acrosomes acrosom across the grain ar draws y graen acrostic acrostig acrylic acrylig acrylic canvas cynfas acrylig acrylic colour lliw acrylig acrylic colours lliw acrylig acrylic medium cyfrwng acrylig acrylic mediums cyfrwng acrylig acrylic paint paent acrylig acrylic paints paent acrylig acrylic resin resin acrylig acrylic resins resin acrylig acrylics acrylig acryloid acryloid acryloids acryloid act deddf (=law) act gweithred (=deed, action) act gweithredu act of God gweithred Duw act of parliament deddf seneddol act tune entr'acte act tunes entr'acte act utilitarianism iwtilitariaeth gweithredoedd act utilitarianisms iwtilitariaeth gweithredoedd actinium actiniwm (Ac) actiniums actiniwm (Ac) actinomorphic actinomorffig action arwaith (=exertion of energy or influence) action drama (in opera) action effaith (=effect) action gweithred (=thing done) action symudiad (in dance) action and reaction arwaith ac adwaith action of acid on copper effaith asid ar gopr action painting paentiad gweithredol (of painted picture) action painting peintio gweithredol (of process or art) action paintings paentiad gweithredol (of painted picture) action plan cynllun gweithredu action plans cynllun gweithredu action point pwynt gweithredu action points pwynt gweithredu action potential potensial gweithredu action potentials potensial gweithredu action research ymchwil gweithredol action researches ymchwil gweithredol action song cân actol action songs cân actol action spectrum sbectrwm gweithredu action spectrums sbectrwm gweithredu action-space gofod gweithredu action-spaces gofod gweithredu actionable per se cyfreithadwy per se actions arwaith (=exertion of energy or influence) actions drama (in opera) actions effaith (=effect) actions gweithred (=thing done) actions symudiad (in dance) actions on the floor gweithrediadau ar y llawr activate actifadu (in chemistry) activate ysgogi (in general) activated actifedig (in chemistry) activation actifiant activation energy egni actifadu activations actifiant activator actifadydd activators actifadydd active actif (in science) active bywiog (=lively) active effro (of mind) active gweithgar (of person, life) active gweithredol (=operative) active audience cynulleidfa weithredol active audiences cynulleidfa weithredol active centre canolfan actif active centres canolfan actif active flux fflwcs gweithredol active fluxes fflwcs gweithredol active immunity imiwnedd gweithredol active lifestyle dull o fyw bywiog active lifestyles dull o fyw bywiog active listening gwrando gweithredol active planning cynllunio gweithredol active population poblogaeth o oed gwaith active populations poblogaeth o oed gwaith active reading darllen gweithredol active transport cludiant actif (in biology) active transports cludiant actif (in biology) activity actifedd (of chemical function) activity gweithgaredd (in general sense) activity coefficient cyfernod actifedd activity coefficients cyfernod actifedd activity flow llif gweithgaredd activity flows llif gweithgaredd activity learning dysgu drwy weithgaredd activity method dull dysgu drwy weithgaredd activity methods dull dysgu drwy weithgaredd activity specific gweithgaredd benodol activity teaching addysgu drwy weithgaredd actual cost cost wirioneddol actual costs cost wirioneddol actual instruction cyfarwyddyd gwirioneddol (that blows) actual instructions cyfarwyddyd gwirioneddol (that blows) actual investment buddsoddiad cyflawnedig (cord, rope etc) actual investments buddsoddiad cyflawnedig (cord, rope etc) actual parameter paramedr gwirioneddol actual parameters paramedr gwirioneddol actual sin pechod gweithredol actual sins pechod gweithredol actual size maint iawn actual sizes maint iawn actuality digwyddiadau ar y pryd actuate ysgogi actuating plate plât ysgogi actuating plates plât ysgogi acuity craffter acupuncture aciwbigo acute llem (with feminine nouns) acute llym (with masculine and plural nouns) acute angle ongl lem acute angled triangle triongl ongl lem acute angled triangles triongl ongl lem acute angles ongl lem acute confusional state cyflwr dryslyd llym acute confusional states cyflwr dryslyd llym acute illness afiechyd llym acute pain poen llym acute pains poen llym acyl asyl acyl halide asyl halid acyl halides asyl halid acylate asyleiddio acylation asyleiddiad acylations asyleiddiad ad lib ad lib ad lib ad libio ad libs ad lib ad valorem subsidy cymhorthdal ad valorem ad valorem tax treth ad valorem ad valorem taxes treth ad valorem adapt addasu adapt ymaddasu adapt to a specialized environment ymaddasu i amgylchfyd arbennig adaptability hyblygrwydd adaptable addasadwy (in general) adaptable hyblyg (of person) adaptation addasiad (in general) adaptation ymaddasiad (of self) adaptation of pattern addasiad patrwm adaptations addasiad (in general) adaptations ymaddasiad (of self) adaptive addasol (in general) adaptive ymaddasol (of self) adaptive behaviour ymddygiad ymaddasol adaptive behaviours ymddygiad ymaddasol adaptive development datblygiad ymaddasol adaptive developments datblygiad ymaddasol adaptive education addysg ymaddasol adaptive educations addysg ymaddasol adaptive programme rhaglen ymaddasol adaptive programmes rhaglen ymaddasol adaptive response ymateb ymaddasol adaptive responses ymateb ymaddasol adaptor addasydd adaptors addasydd adaxial adechelinol add adio (numbers) add-on ychwanegyn add-ons ychwanegyn added atodol (in music) added note nodyn atodol added notes nodyn atodol added sixth chweched atodol added sixth chord cord y chweched atodol added sixth chords cord y chweched atodol added sixths chweched atodol added value hyd atodol (of musical note) added value note nodyn hyd atodol added value notes nodyn hyd atodol added values hyd atodol (of musical note) addend adend addends adend addendum adendwm addendums adendwm adder adydd (related to addition) adders adydd (related to addition) addict adict addicted caeth (to drugs etc) addiction caethiwed addictions caethiwed addictive caethiwus addicts adict adding machine peiriant adio adding machines peiriant adio addition adiad (in counting numbers) addition ychwanegiad (=thing added) addition law deddf adio addition laws deddf adio addition polymerization polymeriad adio addition polymerizations polymeriad adio addition reaction adwaith adio addition reactions adwaith adio additional ychwanegol additional accompaniment cyfeiliant ychwanegol additional accompaniments cyfeiliant ychwanegol additional capital cyfalaf ychwanegol additional capitals cyfalaf ychwanegol additional component cydran ychwanegol additional components cydran ychwanegol additional force grym ychwanegol additional forces grym ychwanegol additional guidance canllaw pellach additional guidances canllaw pellach additional income incwm ychwanegol additional incomes incwm ychwanegol additional piece darn ychwanegol additional pieces darn ychwanegol additions adiad (in counting numbers) additions ychwanegiad (=thing added) additive adiol additive adiolyn (of numbers) additive ychwanegyn (of substance) additive bilingualism dwyieithrwydd cynyddol additive bilingualisms dwyieithrwydd cynyddol additive printing argraffu ychwanegol additives adiolyn (of numbers) additives ychwanegyn (of substance) address anerchiad (=speech) address annerch (a meeting) address cyfarch (a ball in sport) address cyfeiriad (on a letter etc) address cyfeirio (a letter) address mynd i'r afael (an issue) address a memory cyfeirio cof address generation cynhyrchu cyfeiriad address modification addasu cyfeiriad address register cofrestr cyfeiriadau address registers cofrestr cyfeiriadau addressing mode modd cyfeirio addressing modes modd cyfeirio adenosine diphosphate adenosin deuffosffad (ADP) adenosine diphosphates adenosin deuffosffad (ADP) adenosine monophosphate adenosin monoffosffad (AMP) adenosine monophosphates adenosin monoffosffad (AMP) adenosine triphosphate adenosin triffosffad (ATP) adenosine triphosphates adenosin triffosffad (ATP) adenyl cyclase adenyl cyclas adenyl cyclases adenyl cyclas adequate digonol adequate control rheolaeth ddigonol adequate controls rheolaeth ddigonol adequate movement symudiad digonol adequate movements symudiad digonol adequate size maint digonol adequate sizes maint digonol adhere adlynu (of substance) adhere cadw at (= keep to rules etc) adhere glynu (in general) adhere ymlynu (of person) adherence adlyniad (of substance) adherence ymlyniad (of person) adherences adlyniad (of substance) adherences ymlyniad (of person) adherent ymlynwr adherents ymlynwr adhesion adlyniad (of substance) adhesion ymlyniad (of person) adhesions adlyniad (of substance) adhesions ymlyniad (of person) adhesive adlyn (in technical usage) adhesive adlynol adhesive gludydd (=glue) adhesive cell cell adlynol adhesive cells cell adlynol adhesive dressing gorchudd adlynol adhesive dressings gorchudd adlynol adhesive power nerth adlynol adhesive powers nerth adlynol adhesive putty pwti adlynol adhesive strapping stribedyn adlynol adhesive strappings stribedyn adlynol adhesive tape tâp adlynol adhesive tapes tâp adlynol adhesives adlyn (in technical usage) adhesives gludydd (=glue) adiabatic adiabatig adipose blonegog adipose tissue meinwe bloneg adipose tissues meinwe bloneg adiposity blonegrwydd adjacent cyfagos adjacent angle ongl gyfagos adjacent angles ongl gyfagos adjacent face wyneb cyfagos adjacent faces wyneb cyfagos adjacent part darn cyfagos adjacent parts darn cyfagos adjacent side ochr gyfagos adjacent sides ochr gyfagos adjoined cydiedig adjoint atgyd adjoints atgyd adjourn gohirio adjournment gohiriad adjournments gohiriad adjudication beirniadaeth adjudications beirniadaeth adjudicator beirniad adjudicators beirniad adjugate atgydiol adjust addasu (=make suitable) adjust cymhwyso (=regulate) adjust intensity addasu dwysedd adjust the budget addasu'r gyllideb adjust the spectrometer cymhwyso'r sbectromedr adjustable cymwysadwy adjustable arm braich gymwysadwy adjustable arms braich gymwysadwy adjustable attachment atodyn cymwysadwy adjustable attachments atodyn cymwysadwy adjustable bevel befel cymwysadwy adjustable bevels befel cymwysadwy adjustable fence ffens gymwysadwy adjustable fences ffens gymwysadwy adjustable frame ffrâm gymwysadwy adjustable frames ffrâm gymwysadwy adjustable reamer agorell gymwysadwy adjustable reamers agorell gymwysadwy adjustable shelf silff gymwysadwy adjustable shelf support cynheiliad silffoedd cymwysadwy adjustable shelf supports cynheiliad silffoedd cymwysadwy adjustable shelfs silff gymwysadwy adjustable spanner sbaner cymwysadwy adjustable spanners sbaner cymwysadwy adjustable table bwrdd cymwysadwy adjustable tables bwrdd cymwysadwy adjustable wrench tyndro cymwysadwy adjustable wrenches tyndro cymwysadwy adjusted wedi'i chymhwyso (with feminine nouns) adjusted wedi'i gymhwyso (with masculine nouns) adjuster cymhwysydd adjusters cymhwysydd adjusting device dyfais gymhwyso adjusting devices dyfais gymhwyso adjusting mechanism peirianwaith cymhwyso adjusting mechanisms peirianwaith cymhwyso adjusting nut nyten gymhwyso adjusting nuts nyten gymhwyso adjusting rod rhoden gymhwyso adjusting rods rhoden gymhwyso adjusting screw sgriw gymhwyso adjusting screws sgriw gymhwyso adjusting strap strap gymhwyso adjusting straps strap gymhwyso adjustment cymhwysiad adjustments cymhwysiad administer gweini (=provide a remedy) administer gweinyddu (=manage) administrating system system weinyddu administrating systems system weinyddu administration gweiniad (=application of remedies) administration gweinyddiad (act of) administration gweinyddiaeth (=body or management) administration department adran weinyddu administration departments adran weinyddu administration system system weinyddu (in IT) administration systems system weinyddu (in IT) administrations gweiniad (=application of remedies) administrations gweinyddiad (act of) administrations gweinyddiaeth (=body or management) administrative gweinyddol administrative authority awdurdod gweinyddol administrative headquarters pencadlys gweinyddol administrative history hanes gweinyddol administrative procedure trefn weinyddol administrative procedures trefn weinyddol administrative region rhanbarth gweinyddol administrative regions rhanbarth gweinyddol administrative tribunal tribiwnlys gweinyddol administrative tribunals tribiwnlys gweinyddol administrative unit uned weinyddol administrative units uned weinyddol administrator gweinyddwr administrators gweinyddwr admiral llyngesydd admirals llyngesydd admiralty court llys morlys admiralty courts llys morlys admiration edmygedd admirations edmygedd admire edmygu admissible derbyniadwy admission cyfaddefiad (=acknowledgement) admission derbyniad (=person admitted) admissions cyfaddefiad (=acknowledgement) admissions derbyniad (=person admitted) admissions criteria meini prawf derbyn admissions policy polisi derbyn admissions procedure trefn dderbyn admissions procedures trefn dderbyn admittance mynediad (=process or right of entering) admittances mynediad (=process or right of entering) admixture cymysgiad admixtures cymysgiad admonish siarsio (clergy) admonition siars (to clergy) admonitions siars (to clergy) adolescence llencyndod adolescences llencyndod adolescent llencynnaidd adolescent person ifanc adolescents person ifanc adopt derbyn (a measure) adopt mabwysiadu (in general) adopted mabwysiedig adoption mabwysiad adoption agency asiantaeth fabwysiadu adoptionism mabwysiadaeth adoptionisms mabwysiadaeth adoptions mabwysiad adoptive parent rhiant mabwysiadol adoptive parents rhiant mabwysiadol adoration addoliad (in technical usage) adorations addoliad (in technical usage) adorn addurno adornment addurn adornments addurn adrenal cortex cortecs y chwarren adrenal adrenal cortex stimulating hormone HSCA hormon symbylu’r cortecs adrenal HSCA adrenal cortexes cortecs y chwarren adrenal adrenal gland chwarren adrenal adrenal glands chwarren adrenal adrenal medulla medwla y chwarren adrenal adrenal medullas medwla y chwarren adrenal adrenalin adrenalin adrenalins adrenalin adret llygad haul (=sonnenseite) adrets llygad haul (=sonnenseite) adsorb arsugno adsorbate arsugnyn adsorbates arsugnyn adsorbency arsugnedd adsorbent arsugnydd adsorbents arsugnydd adsorption arsugniad adsorptions arsugniad aduki beans ffa adwci adult oedolyn adult education addysg oedolion adult educations addysg oedolion adult expectations disgwyliadau oedolion adult form of the parasite oedolyn y parasit adult life bywyd oedolyn adult lifes bywyd oedolyn adult literacy and basic skills unit uned llythrennedd a sgiliau sylfaenol i oedolion adult literacy and basic skills units uned llythrennedd a sgiliau sylfaenol i oedolion adult stage ffurf oedolyn adult stages ffurf oedolyn adult training centre canolfan hyfforddi oedolion adult training centres canolfan hyfforddi oedolion adulterate difwyno adulteration difwyniad adulterations difwyniad adultery godineb adults oedolyn advance blaenswm (of money) advance blaenu (in fencing) advance cynnydd (in general) advance estyn (of ice-sheet etc) advance estyniad (of ice-sheet etc) advance symud ymlaen (=move forward) advance and retreat estyn ac encilio (of ice-sheet etc) advance factory ffatri barod advanced blaengar (of ideas, opinions) advanced datblygedig (=developed) advanced uwch (=higher) advanced disk filing system system ddisg-ffeilio uwch (ADFS) advanced disk filing systems system ddisg-ffeilio uwch (ADFS) advanced engineering peirianneg uwch advanced engineerings peirianneg uwch advanced further education addysg bellach uwch advanced further educations addysg bellach uwch advanced gas-cooler reactor adweithydd nwy-oeredig uwch advanced gas-cooler reactors adweithydd nwy-oeredig uwch advanced learner dysgwr uwch advanced learners dysgwr uwch advancement symudiad ymlaen (=movement forward) advancements symudiad ymlaen (=movement forward) advances blaenswm (of money) advances cynnydd (in general) advances estyniad (of ice-sheet etc) advantage mantais advantage law rheol fantais advantage laws rheol fantais advantageous promise addewid manteisiol advantageous promises addewid manteisiol advantages mantais advection llorfudiant advection fog niwl llorfudol advection fogs niwl llorfudol advections llorfudiant advenae estroniaid adventitious root adwreiddyn adventitious roots adwreiddyn adventive cone côn parasitig adventive cones côn parasitig adventure activity gweithgaredd antur adventure learning dysgu antur adventure play chwarae antur adventure playground maes chwarae antur adventure playgrounds maes chwarae antur adventure training hyfforddiant antur adventure trainings hyfforddiant antur adventurous activity gweithgaredd antur adversarial system system wrthwynebol adversarial systems system wrthwynebol adversely er gwaeth advertise hysbysebu advertisement hysbyseb advertisements hysbyseb advertising agency asiantaeth hysbysebu advertising agent asiant hysbysebu advertising agents asiant hysbysebu advertising campaign ymgyrch hysbysebu advertising campaigns ymgyrch hysbysebu advertising media cyfryngau hysbysebu advertising slogan slogan hysbysebu advertising slogans slogan hysbysebu advice cyngor advice and information service gwasanaeth cyngor a gwybodaeth advice and information services gwasanaeth cyngor a gwybodaeth advice slip slip hysbysu advice slips slip hysbysu advices cyngor adviser ymgynghorydd advisers ymgynghorydd advisory ymgynghorol advisory and peripatetic teacher athrawes ymgynghorol a chylchynol (female) advisory and peripatetic teacher athro ymgynghorol a chylchynol (male) advisory and peripatetic teachers athrawes ymgynghorol a chylchynol (female) advisory and peripatetic teachers athro ymgynghorol a chylchynol (male) advisory committee pwyllgor ymgynghorol advisory committee on education pwyllgor addysg ymgynghorol advisory committee on legal education and conduct pwyllgor ymgynghorol ar addysg ac ymddygiad cyfreithiol advisory committees pwyllgor ymgynghorol advisory council cyngor ymgynghorol advisory councils cyngor ymgynghorol advisory function swyddogaeth ymgynghorol advisory functions swyddogaeth ymgynghorol advisory officer swyddog cynghori advisory officers swyddog cynghori advisory service gwasanaeth cynghori advisory services gwasanaeth cynghori advocacy eiriolaeth advocate adfocad (=barrister in Scotland) advocate eiriolwr (=person who pleads for another) advocates adfocad (=barrister in Scotland) advocates eiriolwr (=person who pleads for another) advowry adfowri advowson adfowswn advowsons adfowswn adze neddyf adzes neddyf aeolian aeolaidd aeolian harp telyn awelon aeolian harps telyn awelon aeon aeon aeons aeon aerate awyru aerated awyrog aeration awyriad aeration stream llif awyru aeration streams llif awyru aerations awyriad aerator pump pwmp awyru aerator pumps pwmp awyru aerial awyrol aerial erial aerial photograph awyrlun aerial photographs awyrlun aerial ropeway rhaffordd awyr aerials erial aerobic aerobig aerobic respiration resbiradaeth aerobig aerobic respirations resbiradaeth aerobig aerobic running rhedeg aerobig aerobics aerobeg aerodynamics aerodynameg aerography aerograffiaeth aerology aeroleg aeronautics awyrennaeth aeronautics industry diwydiant awyrennau aerosol aerosol aerosol fixative sefydlyn aerosol aerosol fixatives sefydlyn aerosol aerosol inhaler anadlydd aerosol aerosol inhalers anadlydd aerosol aerosol spray chwistrell aerosol aerosols aerosol aerospace awyrofod aerospace industry diwydiant awyrofod aerospaces awyrofod aesthetic esthetig aesthetic quality priodoledd esthetig aestheticism esthetigaeth aestheticisms esthetigaeth aesthetics estheteg aetiological achosegol aetiological legend chwedl achosegol aetiological legends chwedl achosegol aetiology achoseg affair achos (=noteworthy thing) affair helynt (=notorious happening) affair mater (=public matter) affairs achos (=noteworthy thing) affairs helynt (=notorious happening) affairs mater (=public matter) affect affaith affect affeithio affection anwyldeb (=tenderness) affection serch (=fondness) affections anwyldeb (=tenderness) affections serch (=fondness) affective affeithiol affective disorder anhwylder affeithiol affective disorders anhwylder affeithiol affective domain maes affeithiol affective domains maes affeithiol affectivity affeithiolrwydd affects affaith afferent afferol afferent neuron niwron afferol afferent neurons niwron afferol affiliate cysylltu affiliated cyswllt affiliated member aelod cyswllt affiliated members aelod cyswllt affine affin affines affin affinity affinedd (in biochemistry) affirmation cadarnhad affirmations cadarnhad affix sicrhau afflation anadliad afflations anadliad affluent llednant (=tributary stream) affluent society cymdeithas gefnog affluents llednant (=tributary stream) afforestation coedwigo after-care ôl-ofal after-cares ôl-ofal after-effect ôl-effaith after-effects ôl-effaith after-image ôl-ddelwedd after-images ôl-ddelwedd after-sales service gwasanaeth ôl-werthu after-sales services gwasanaeth ôl-werthu after-school club clwb ar ôl ysgol after-school clubs clwb ar ôl ysgol after-school lesson gwers ar ôl ysgol after-school lessons gwers ar ôl ysgol afterbirth brych afterbirths brych afterglow ôl-dywyn afterglows ôl-dywyn aftermath canlyniad aftermaths canlyniad aftershock ôl-gryniad aftershocks ôl-gryniad against the grain yn erbyn y graen agape agape (=Christian fellowship) agapes agape (=Christian fellowship) agate agat agate ware crochenwaith agat agate wares crochenwaith agat agates agat age oed (of person) age oes (=period) age equivalent cyfatebiaeth oed age equivalents cyfatebiaeth oed age group grŵp oedran age groups grŵp oedran age hardening oed galedu age norm norm oed age norms norm oed age phase lefel age phase thesaurus thesawrws lefel age phases lefel age range ystod oedran age ranges ystod oedran age regression adlithro oed age structure adeiledd oedran age structures adeiledd oedran aged oedrannus (of person) ageing heneiddio ageing population poblogaeth sy'n heneiddio ageing populations poblogaeth sy'n heneiddio agency asiantaeth agenda agenda agendas agenda agent asiant (of person) agent cyfrwng (of force or effect) agents asiant (of person) agents cyfrwng (of force or effect) agglomerate athyrru (in geology) agglomerate llosg-garnedd (in geology) agglomerates llosg-garnedd (in geology) agglutinate cyfludo agglutinated cyfludedig agglutination cyfludiad agglutinations cyfludiad aggradation adraddiant aggradations adraddiant aggrade adraddu aggregate agreg (of stone) aggregate agregu (=combine into mass) aggregate cydgasglu (=collect together) aggregate cyfanred (in mathematics) aggregate cyfanredol (in mathematics) aggregate analysis dadansoddiad cyfanredol aggregate demand galw cyfanredol aggregate demands galw cyfanredol aggregate results canlyniadau cyfanredol aggregate schools budget cyllideb gyfanredol ysgolion aggregate schools budgets cyllideb gyfanredol ysgolion aggregate supply cyflenwad cyfanredol aggregates agreg (of stone) aggregates cyfanred (in mathematics) aggression ymddygiad ymosodol (of behaviour) aggression ymosodedd (in psychology) aggression ymosodiad (=attack) aggressions ymddygiad ymosodol (of behaviour) aggressions ymosodedd (in psychology) aggressions ymosodiad (=attack) aggressive ymosodol aggressor ymosodwr aggressors ymosodwr agile ystwyth agility ystwythder agitate cynhyrfu agitation cynnwrf agitations cynnwrf agitator cynhyrfwr agitators cynhyrfwr agnate agnawd agnostic agnostig agnosticism agnosticiaeth agnosticisms agnosticiaeth agony ing agranulocyte agranwlocyt agranulocytes agranwlocyt agrarian amaethyddol agrarian history hanes amaethyddiaeth agrarian reform diwygio amaethyddol agreed cytûn agreed policy polisi cytûn agreed syllabus maes llafur cytûn agreement cytundeb agreement trial treial cytuno agreement trials treial cytuno agreements cytundeb agricultural area ardal amaethyddol agricultural areas ardal amaethyddol agricultural deficiency area ardal o dangynhyrchu amaethyddol agricultural deficiency areas ardal o dangynhyrchu amaethyddol agricultural surplus area ardal o orgynhyrchu amaethyddol agricultural surplus areas ardal o orgynhyrchu amaethyddol agriculture amaethyddiaeth agricultures amaethyddiaeth agrostis maeswellt ague clefyd crynu agues clefyd crynu aid cymhorthdreth (tax) aid cymorth (in general) aid cynorthwyo aid and trade cymorth a masnach aide cymhorthiad (e.g. teacher's aide) aides cymhorthiad (e.g. teacher's aide) aiguille nodwydd aiguilles nodwydd ailment anhwylder ailments anhwylder aim aneliad (in sport) aim anelu (towards a target) aim nod (in education) aim a stroke anelu ergyd aim for the hurdle anelu at y glwyd aim the ball anelu'r bêl aim the volley anelu'r foli aiming error gwall anelu aiming errors gwall anelu aims and objectives nodau ac amcanion air aer (as a substance) air awyr (as a place) air cainc (in penillion singing) air crasu (clothes) air bladder chwysigen aer air bladders chwysigen aer air brush brwsh aer air brushs brwsh aer air column colofn aer air columns colofn aer air cool awyr-oeri air cored solenoid solenoid craidd aer air cored solenoids solenoid craidd aer air corridor coridor awyr air corridors coridor awyr air current cerrynt aer air currents cerrynt aer air extraction duct dwythell echdynnu aer air extraction ducts dwythell echdynnu aer air filter hidlydd aer air filters hidlydd aer air force llu awyr air forces llu awyr air grinder llifanydd aer air grinders llifanydd aer air hardening aergaledu air lock aerglo air locks aerglo air passage pibell aer air passages pibell aer air piracy awyr-ladrad air power grym awyrennol air powers grym awyrennol air pressure gwasgedd aer air pressures gwasgedd aer air raid cyrch awyr air raids cyrch awyr air resistance gwrthiant aer air resistances gwrthiant aer air route llwybr awyr air routes llwybr awyr air sac coden aer air sacs coden aer air survey arolwg awyr air with variations alaw ag amrywiadau air-borne troops awyrfilwyr air-condition aerdymheru air-conditioned aerdymherus air-conditioner aerdymherydd air-conditioners aerdymherydd air-cored coil coil craidd aer air-cored coils coil craidd aer air-cushion clustog aer air-cushions clustog aer air-mass aergorff air-raid shelter lloches cyrch awyr air-raid shelters lloches cyrch awyr air-track trac aer air-tracks trac aer aircraft carrier llong awyrennau aircraft carriers llong awyrennau aircraft industry diwydiant awyrennau airfield maes glanio airfields maes glanio airing cupboard cwpwrdd crasu dillad airing cupboards cwpwrdd crasu dillad airing rack rhesel grasu dillad airing racks rhesel grasu dillad airlift awyrgludiad airlifts awyrgludiad airline cwmni hedfan airlines cwmni hedfan airport maes awyr airports maes awyr airscrew aersgriw airscrews aersgriw airtight aerglos airway llwybr anadlu aisle eil aisled eiliog aisles eil akirah akirah al-Qad'r al-Qad'r al-Qad'rs al-Qad'r alabaster alabastr alabasters alabastr alalia alalia alalias alalia alanine alanin alanines alanin alarm larwm alarms larwm alb alb albatross albatros albedo albedo albinism albinedd albinisms albinedd albino albinaidd albino albino alborada alborada alboradas alborada album albwm albumen albwmen albumens albwmen albums albwm alchemist alcemydd alchemists alcemydd alchemy alcemeg alclad alclad alclads alclad alcohol alcohol alcoholic alcoholig alcoholic drink diod feddwol alcoholic drinks diod feddwol alcoholics alcoholig alcoholism alcoholiaeth alcoholisms alcoholiaeth alcohols alcohol alcove alcof alcoves alcof alder gwernen alderman henadur aldermans henadur alders gwernen aleatory aleatoraidd alellopathy alelopathi aleurone alewron aleurone layer haenen alewron aleurone layers haenen alewron aleurones alewron alfalfa maglys alfalfas maglys alga alga algas alga algebra algebra algebraic expression mynegiad algebraidd algebraic expressions mynegiad algebraidd algebraic number rhif algebraidd algebraic numbers rhif algebraidd algebraic skill sgìl algebraidd algebraic skills sgìl algebraidd algebras algebra algorithm algorithm algorithmic algorithmig algorithms algorithm alidade alidad alidades alidad alien estron alien priory allbriordy alienate arallu (property) alienate gelyniaethu (a person) alienation aralliad (of property etc) alienation gelyniaethiad (=cause to become hostile) alienation office swyddfa arallu alienation offices swyddfa arallu alienations aralliad (of property etc) alienations gelyniaethiad (=cause to become hostile) aliens estron align alinio align left alinio i'r chwith align right alinio i'r dde aligned aliniedig alignment aliniad alignments aliniad alimentary canal llwybr ymborth alimentary canals llwybr ymborth alimentation croniad eira (of snow) alimentations croniad eira (of snow) aliquot alicwot (in chemistry) aliquot cydrifol aliquot cyfnifer (in mathematics) aliquots alicwot (in chemistry) aliquots cyfnifer (in mathematics) alizarin brown brown alisarin alizarin browns brown alisarin alizarin crimson rhuddgoch alisarin alizarin crimsons rhuddgoch alisarin alizarin dye llifyn alisarin alizarin dyes llifyn alisarin alizarin green gwyrdd alisarin alizarin greens gwyrdd alisarin alizarin purple lake llif porffor alisarin alizarin purple lakes llif porffor alisarin alizarin violet fioled alisarin alizarin violets fioled alisarin alizarin yellow melyn alisarin alizarin yellows melyn alisarin alkali alcali alkali metal metel alcalïaidd alkali metals metel alcalïaidd alkaline alcalïaidd alkaline earth metal metel mwynol alcalïaidd alkaline earth metals metel mwynol alcalïaidd alkaline glaze gwydredd alcalïaidd alkaline glazes gwydredd alcalïaidd alkaline hydrolysis hydrolysis alcalïaidd alkalinity alcalinedd alkalis alcali alkane alcan alkanes alcan alkaptonuria alcaptonwria alkaptonurias alcaptonwria alkene alcen alkenes alcen alkybenzene alcybensen alkybenzenes alcybensen alkylate alcyleiddio alkylation alcyleiddiad alkylations alcyleiddiad alkyne alcyn alkynes alcyn all important hollbwysig all square sgwâr all squared i gyd wedi'u sgwario all squares sgwâr all-hard blade llafn cwbl-galed all-hard blades llafn cwbl-galed all-hard hacksaw blade llafn haclif cwbl-galed all-hard hacksaw blades llafn haclif cwbl-galed all-interval series cyfres pob cyfwng all-over pattern patrwm trosodd all-over patterns patrwm trosodd all-rounder chwaraewr amryddawn all-rounders chwaraewr amryddawn alla cappella alla cappella allantois alantois allegation honiad allegations honiad allege honni allegiance teyrngarwch allegiance homage gwrogaeth teyrngarwch allegiance homages gwrogaeth teyrngarwch allegiances teyrngarwch allegorical alegorïaidd allegory alegori allele alel allele frequency amlder alel alleles alel allelomorph alelomorff allelomorphs alelomorff allemande allemande allemandes allemande allergic alergaidd allergic reaction adwaith alergaidd allergic reactions adwaith alergaidd allergy alergedd alliance cynghrair alliances cynghrair allied cynghreiriol (in war) allied perthynol (=related) allied landing glaniad y cynghreiriaid allied landings glaniad y cynghreiriaid alligator jaw safn aligator alligator jaws safn aligator alliteration cyflythreniad allocate dosbarthu (students) allocate dyrannu (resources etc) allocation dosbarthiad (of students) allocation dyraniad (of resources etc) allocations dosbarthiad (of students) allocations dyraniad (of resources etc) allocative efficiency effeithlonrwydd dyrannol allogenic alogenig allometric growth twf alometrig allometric growths twf alometrig allopolyploid alopolyploid allopolyploidy alopolyploidi allot pennu allotetraploid alotetraploid allotment rhandir allotments rhandir allotrope alotrop allotropes alotrop allotropic alotropig allotropy alotropaeth allow caniatáu allowance lwfans allowances lwfans alloy aloi alloy steel dur aloi alloy steels dur aloi alloying elements elfennau aloi allspice pupur Jamaica allspices pupur Jamaica alluvial llifwaddodol alluvial deposit llifwaddod alluvial deposits llifwaddod alluvial fan bwa llifwaddod alluvial fans bwa llifwaddod alluvial plain gwastatir llifwaddod alluvial plains gwastatir llifwaddod alluvium llifwaddod alluviums llifwaddod ally cynghreiriad allylics alylicion almighty hollalluog almond cneuen almon almond essence rhinflas almon almond essences rhinflas almon almonds cneuen almon almoner elusennwr almoners elusennwr almonry elusenfa alms elusen almshouse elusendy almshouses elusendy alocryl alocryl alocryl medium cyfrwng alocryl alocryl mediums cyfrwng alocryl alocryls alocryl along the grain ar hyd y graen alp alp alpenhorn alpgorn alpenhorns alpgorn alpha particle gronyn alffa alpha particles gronyn alffa alphabet gwyddor alphabet agencies adrannau'r wyddor alphabetic method dull a, b, c alphabetic methods dull a, b, c alphabetical order trefn y wyddor alphabetical orders trefn y wyddor alphabets gwyddor alphameric alffamerig alphanumeric alffaniwmerig alpine alpaidd alpine butterfly cwlwm canolwr altar allor altar piece allorlun altar pieces allorlun altarage allordal altarages allordal altars allor altars once so privileged allorau mawr eu braint alter sensitivity newid sensitifrwydd alteration newid alteration line llinell newid alteration lines llinell newid alterations newid alternate aryneilio alternate bob yn ail (in general) alternate eiledol (in technical usage) alternate angle ongl eiledol alternate angles ongl eiledol alternate bud blaguryn eiledol alternate buds blaguryn eiledol alternate grasp gafael bob yn ail alternate layers haenau eiledol alternating eiledol alternating current cerrynt eiledol (A.C.) alternating currents cerrynt eiledol (A.C.) alternation of generations eilededd cenedlaethau alternative amgen (=preferable) alternative arall (=other) alternative dewis alternative forms of care mathau eraill o ofal alternative hypothesis rhagdybiaeth arall alternative medicine meddygaeth amgen alternative medicines meddygaeth amgen alternative narrative naratif arall alternative narratives naratif arall alternative society cymdeithas amgen alternative technology technoleg amgen alternative worship addoliad amgen alternative worships addoliad amgen alternatives dewis alternativo alternativo alternator eiliadur alternators eiliadur altimeter altimedr altimeters altimedr altiplanation uwchwastadiant altiplanations uwchwastadiant altitude uchder altitudes uchder altmode eilfodd altmodes eilfodd alto alto alto clarinet clarinét alto alto clarinets clarinét alto alto flute ffliwt alto alto flutes ffliwt alto alto-relievo cerfwedd uchel altocumulus altocumulus altostratus altostratus alum alwm alumina alwmina aluminas alwmina aluminium alwminiwm (Al) aluminium alloy aloi alwminiwm aluminium bronze efydd alwminiwm aluminium bronzes efydd alwminiwm aluminium chloride alwminiwm clorid aluminium chlorides alwminiwm clorid aluminium foil ffoil alwminiwm aluminium foils ffoil alwminiwm aluminium oxide alwminiwm ocsid aluminium oxide paper papur alwminiwm ocsid aluminium oxide papers papur alwminiwm ocsid aluminium oxides alwminiwm ocsid aluminium screw sgriw alwminiwm aluminium screws sgriw alwminiwm aluminium track trac alwminiwm aluminium tracks trac alwminiwm aluminiums alwminiwm (Al) alums alwm alveolar alfeolaidd (of lungs) alveolar gorfannol (of gums) alveolar bone asgwrn y gorfant alveolar bones asgwrn y gorfant alveolus alfeolws amalgam amalgam amalgamate cyfuno amalgamation cyfuniad amalgamations cyfuniad amalgams amalgam amanuensis ysgrifennydd amateur amatur amateurism amaturiaeth amateurisms amaturiaeth amateurs amatur ambassador llysgennad ambassadors llysgennad amber ambr (=fossilized resin) amber melyngoch (enamelling colour) amber brown melynfrown (enamelling colour) amber browns melynfrown (enamelling colour) ambers ambr (=fossilized resin) ambers melyngoch (enamelling colour) ambiguous amwys ambulance ambiwlans ambulance driver gyrrwr ambiwlans ambulance drivers gyrrwr ambiwlans ambulances ambiwlans ambulant yn gallu cerdded ambulatory cerddedfa ambush rhagod ambushs rhagod amen amen amen cadence diweddeb amen amen cadences diweddeb amen amend diwygio amendment gwelliant (to a resolution) amendment newid (to a text) amendments gwelliant (to a resolution) amendments newid (to a text) amenity mwynder amens amen amerce amersu amercement amersiad amercements amersiad americium americiwm (Am) americiums americiwm (Am) amicable grant grant gwirfoddol amicable grants grant gwirfoddol amicable loan benthyciad cyfeillgar amicable loans benthyciad cyfeillgar amice amis amices amis amide amid amides amid amination amineiddiad aminations amineiddiad amine amin amines amin amino acid asid amino amino acids asid amino amino plastics aminoblastigion amino resins resinau amino amitosis amitosis ammeter amedr ammeters amedr ammonia amonia ammoniac amoniac ammonias amonia ammonification amoneiddio ammonium chloride amoniwm clorid ammonium chlorides amoniwm clorid ammonium dichromate amoniwm deucromad ammonium dichromates amoniwm deucromad ammonium sulphide amoniwm sylffid ammonium sulphides amoniwm sylffid ammonolysis amonolysis amnesia amnesia amnesias amnesia amnesty amnest amnion amnion amnions amnion amniotic fluid hylif amniotig amniotic fluids hylif amniotig amniotic sac cwd amniotig amniotic sacs cwd amniotig amoeboid amoebaidd amorphous amorffaidd amorphous peat mawn amorffaidd amorphous peats mawn amorffaidd amount cyfanswm (=total) amount swm (=quantity) amount of substance swm y sylwedd (in chemistry) amount owing swm sy'n ddyledus amount owings swm sy'n ddyledus amounts cyfanswm (=total) amounts swm (=quantity) ampere amper amperes amper ampersand ampersand (&) ampersands ampersand (&) amphibian amffibiad amphibians amffibiad amphibious amffibiaidd amphibrach corfan amgyrch amphibraches corfan amgyrch amphictyony amffictyoni amphipathic amffipathig amphiprostyle amffiprostyl amphiprostyles amffiprostyl amphitheatre amffitheatr amphitheatres amffitheatr amphoteric amffoterig amphoteric character nodwedd amffoterig amphoteric characters nodwedd amffoterig amplification mwyhad amplifications mwyhad amplifier mwyhadur amplifiers mwyhadur amplify mwyhau amplitude arg (in mathematics) amplitude osgled (in physics) amplitude envelope chwydd-amlen amplitude envelopes chwydd-amlen amplitude modulated carrier wave ton gario wedi'i modylu'n osgledol amplitude modulated carrier waves ton gario wedi'i modylu'n osgledol amplitude modulation modyliad osgled amplitude modulations modyliad osgled amplitude swing osgiliad (electronics) amplitude swings osgiliad (electronics) amplitudes arg (in mathematics) amplitudes osgled (in physics) ampoule ampwl ampoules ampwl amputate trychu amputation trychiad amputations trychiad amyl acetate amyl asetad amyl acetates amyl asetad amylase amylas amylases amylas amyloplast amyloplast amyloplasts amyloplast anabatic anabatig anabolic anabolig anabolism anabolaeth anabolisms anabolaeth anacrusis anacrwsis anacrustic anacrwstig anaemia anaemia anaemias anaemia anaerobic anaerobig anaerobic respiration resbiradaeth anaerobig anaerobic respirations resbiradaeth anaerobig anaerobic running rhedeg anaerobig anaesthetic anaesthetig anaesthetics anaestheteg anaesthetics anaesthetig anaesthetist anaesthetegydd anaesthetists anaesthetegydd anal rhefrol analgesic poenleddfol analgesic poenleddfwr analgesics poenleddfwr analogical cydweddiadol analogous analogaidd (of computer or electronic process) analogous cydweddol (=partially similar) analogue analog analogue computer cyfrifiadur analog (ADC) analogue computers cyfrifiadur analog (ADC) analogue signal signal analog analogue signals signal analog analogues analog analogy cydweddiad analyse dadansoddi analyser dadansoddydd analysers dadansoddydd analysis dadansoddiad analysis of variance dadansoddiad amrywiant analyst dadansoddwr analysts dadansoddwr analytical dadansoddol analytical chemistry cemeg ddadansoddol analytical continuation parhad dadansoddol analytical continuations parhad dadansoddol analytical notes nodiadau dadansoddol analytical orientation gogwydd dadansoddol analytical orientations gogwydd dadansoddol analytical study astudiaeth ddadansoddol anapaest corfan cyrch dyrchafedig anapaests corfan cyrch dyrchafedig anaphase anaffas anaphases anaffas anaphylactic shock sioc anaffylactig anaphylactic shocks sioc anaffylactig anarchism anarchiaeth anarchisms anarchiaeth anarchist anarchaidd anarchist anarchydd anarchists anarchydd anarchy anarchiaeth anastomosis anastomosis anatomical anatomegol anatomical direction cyfeiriad anatomegol anatomical directions cyfeiriad anatomegol anatomy anatomeg (as science) anatomy anatomi (=body) anatta anatta (Pali = anatman Sanskrit) anattas anatta (Pali = anatman Sanskrit) ancestor hynafiad ancestor worship addoli cyndadau ancestors hynafiad ancestral hynafiadol ancestral traits nodweddion hynafiadol ancestry llinach anchor angor anchor bracket braced angor anchor brackets braced angor anchorage angorfa anchorages angorfa anchorite ancr anchorites ancr anchors angor anchovy brwyniad anchovy essence rhinflas brwyniaid anchovy essences rhinflas brwyniaid ancient hynafol ancient history hanes yr hen fyd ancient monument heneb ancient monuments heneb ancillary ategol ancillary industry diwydiant ategol ancillary staff staff ategol ancillary support cefnogaeth ategol ancillary supports cefnogaeth ategol androecium androeciwm androeciums androeciwm anecdotal art celfyddyd storïol anecdotal arts celfyddyd storïol anemometer anemomedr anemometers anemomedr anemophily anemoffiledd aneroid aneroid aneroid barometer baromedr aneroid aneroid barometers baromedr aneroid aneroids aneroid aneuploid anewploid aneuploids anewploid aneurine anewrin aneurines anewrin angel angel angelica angelica angelicas angelica angels angel anger management rheolaeth dicter anger managements rheolaeth dicter angiosperm angiosberm angiosperms angiosberm angle ongl angle ongli angle bead glain ongl angle beads glain ongl angle bracket braced ongl angle brackets braced ongl angle bridle bagl ongl angle bridles bagl ongl angle dovetail joint uniad cynffonnog onglog angle dovetail joints uniad cynffonnog onglog angle halving haneru ongl angle halving joint uniad haneru ongl angle halving joints uniad haneru ongl angle headstand pensafiad plyg angle headstands pensafiad plyg angle iron haearn ongl angle irons haearn ongl angle of contact ongl gyswllt angle of cutting tool ongl erfyn torri angle of depression ongl ostwng angle of deviation ongl wyriad angle of elevation ongl godiad angle of friction ongl ffrithiant angle of grazing incidence ongl prin drawiad angle of incidence ongl drawiad angle of inclination ongl oledd angle of intersection ongl groestoriad angle of obliquity ongl letrawsedd angle of projection ongl dafluniad angle of reflection ongl adlewyrchiad angle of refraction ongl blygiant angle of rotation ongl gylchdro angle of turning tool ongl erfyn turnio angle plate plât ongl angle plates plât ongl angle projection tafluniad ongl angle projections tafluniad ongl angle shot ergyd onglog angle shots ergyd onglog angled return dychweliad lletraws angled returns dychweliad lletraws angler fish cythraul môr angler fishs cythraul môr angles ongl angora angora angoras angora angular onglaidd (of velocity etc) angular onglog (having angles) angular deformation anffurfiad onglog angular deformations anffurfiad onglog angular face wyneb onglog angular faces wyneb onglog angular frequency amledd cylchdro angular magnification chwyddhad onglog angular magnifications chwyddhad onglog angular momentum momentwm onglaidd angular momentums momentwm onglaidd angular period cyfnod cylchdro angular periods cyfnod cylchdro angular perspective persbectif onglog angular perspectives persbectif onglog angular spread ymlediad onglog angular spreads ymlediad onglog angular thread edau onglog angular threads edau onglog angular velocity cyflymder onglaidd angularity onglogrwydd anharmonic anharmonig anharmonics anharmonig anhydrate anhydrad anhydrates anhydrad anhydride anhydrid anhydrides anhydrid anhydrous anhydrus anicca anicca (Pali = anitya Sanskrit) aniccas anicca (Pali = anitya Sanskrit) aniline anilin aniline colours lliwiau anilin aniline dyes llifion anilin anilines anilin animal anifail animal anifeilaidd animal fat braster anifail animal fats braster anifail animal fibre ffibr anifail animal fibres ffibr anifail animal form ffurf anifeiliaid animal forms ffurf anifeiliaid animal glue glud anifail animal glues glud anifail animal marionette marionét anifail animal marionettes marionét anifail animal suffering dioddefaint anifeiliaid animal sufferings dioddefaint anifeiliaid animals anifail animate animeiddio animation animeiddiad animations animeiddiad animator animeiddydd animators animeiddydd animism animistiaeth animisms animistiaeth animist animistiad animistic animistaidd animists animistiad anion anion anionic anionig anions anion ankle ffêr ankles ffêr anklewarmers socasau annal blwyddnod annals blwyddnod annates anodau (=first fruits) anneal anelio annelid anelid annelids anelid annex cyfeddiannu annexation cyfeddiant annexations cyfeddiant annexe atodiad (to document) annexe rhandy (to building) annexes atodiad (to document) annexes rhandy (to building) annihilate chwalu'n llwyr (in metaphorical sense) annihilate difodi (in literal sense) anniversary pen-blwydd annotate anodi annotated drawing lluniad anodedig annotated drawings lluniad anodedig annotated map map anodedig annotated maps map anodedig annotated sketch braslun anodedig annotated sketch map llinfap wedi’i labelu â nodiadau annotated sketch maps llinfap wedi’i labelu â nodiadau annotated sketches braslun anodedig annotated visual records cofnodion gweledol gyda nodiadau annotation anodiad annotations anodiad annual blodyn unflwydd (flower) annual blynyddol (=occurring every year) annual unflwydd (=lasting for one year) annual premium premiwm blynyddol annual premiums premiwm blynyddol annual rainfall glawiad blynyddol annual rainfalls glawiad blynyddol annual ring cylch blynyddol annual rings cylch blynyddol annual thickening tewychu unflwydd annual wage cyflog blynyddol annual wages cyflog blynyddol annuals blodyn unflwydd (flower) annuity blwydd-dal annul dirymu annular anwlar (in physics) annular modrwyol (=ring-shaped) annular lignification ligneiddiad modrwyol annular lignifications ligneiddiad modrwyol annulate modrwywedd annulment dirymiad annulments dirymiad annulus anwlws (in physics) annulus modrwy (in biology) annunciation cyfarchiad annunciations cyfarchiad anode anod anodes anod anodic anodig anodic oxidation ocsidiad anodig anodic oxidations ocsidiad anodig anodize anodeiddio anoint eneinio anointed eneiniog anointing eneiniad anointings eneiniad anomalous afreolaidd (in general) anomalous anomalus (in astronomy) anomalous anrheolaidd (in biology etc) anomaly achos anrheolaidd (in biology etc) anomaly anghysondeb (in general) anomaly anomaledd (in astronomy) anonymity anhysbysrwydd anorexia nervosa anorecsia nerfosa anorexia nervosas anorecsia nerfosa anorexic anorecsig anoxia anocsia anoxias anocsia answer ateb answers ateb antacid gwrthasid antacids gwrthasid antagonistic gwrthweithiol (of muscles) antagonistic muscle pairs parau gwrthweithiol o gyhyrau antecedent rhagalaw (in canon) antecedent rhagflaenydd (in general) antecedent rhagosod (e.g. drainage) antecedents rhagalaw (in canon) antecedents rhagflaenydd (in general) antechamber rhagsiambr antechambers rhagsiambr antenatal cyn-geni antenatal care gofal cyn-geni antenatal cares gofal cyn-geni antenatal clinic clinig cyn-geni antenatal clinics clinig cyn-geni antenatal parents rhieni sy'n disgwyl antenna antena (=aerial) antenna teimlydd (of anthropod) antennas antena (=aerial) antennas teimlydd (of anthropod) antennule antennyn antennules antennyn anterior pen blaen anterior root nerfwreiddyn blaen (of nerve) anterior roots nerfwreiddyn blaen (of nerve) anteriors pen blaen anthem anthem anthems anthem anther anther anthers anther anthocyanin anthocyanin anthocyanins anthocyanin anthoxanthin anthocsanthin anthoxanthins anthocsanthin anthracite glo carreg anthracites glo carreg anthranilic acid asid anthranilig anthranilic acids asid anthranilig anthropic principle egwyddor anthropig anthropic principles egwyddor anthropig anthropogenic anthropogenig anthropoid anthropoid anthropoids anthropoid anthropology anthropoleg anthropometric anthropometrig anthropometrics anthropometreg anthropomorphic anthropomorffaidd anthropomorphism anthropomorffaeth anthropomorphisms anthropomorffaeth anti bonding gwrthfondio (of orbitals) anti-Comintern pact pact gwrth-Gomintern anti-Comintern pacts pact gwrth-Gomintern anti-European gwrth-Ewropeaidd anti-Semitism gwrth-Semitiaeth anti-bacterial gwrthfacteria (of finish) anti-caking agent cyfrwng gwrthdalpio anti-caking agents cyfrwng gwrthdalpio anti-capillary groove rhigol wrthgapilari anti-capillary grooves rhigol wrthgapilari anti-catholic gwrth-Babyddol anti-clericalism gwrthglerigaeth anti-clericalisms gwrthglerigaeth anti-coagulant cyffur gwrthgeulo anti-coagulants cyffur gwrthgeulo anti-colonialist gwrthdrefedigaethol anti-corrosion agent cyfrwng gwrthgyrydu anti-corrosion agents cyfrwng gwrthgyrydu anti-discrimination gwrthwahaniaethol anti-dust chalk sialc di-lwch anti-dust chalks sialc di-lwch anti-fascist gwrth-ffasgaidd anti-flame gwrth-fflam anti-friction gwrth-ffrithiant anti-friction grease saim gwrth-ffrithiant anti-friction greases saim gwrth-ffrithiant anti-friction metal metel gwrth-ffrithiant anti-friction metals metel gwrth-ffrithiant anti-inflammatory gwrthlidiol (of drug) anti-inflationary gwrthchwyddiannol anti-moth gwrthwyfyn anti-racism gwrth-hiliaeth anti-racisms gwrth-hiliaeth anti-racist education addysg wrth-hiliol anti-racist educations addysg wrth-hiliol anti-slavery movement mudiad gwrthgaethwasiaeth anti-slavery movements mudiad gwrthgaethwasiaeth anti-slip gwrth-lithr anti-snake bar braich sadio anti-snake bars braich sadio anti-terrorism gwrthderfysgaeth anti-terrorisms gwrthderfysgaeth anti-terrorist gwrthderfysgwr anti-terrorist device dyfais wrthderfysgol anti-terrorist devices dyfais wrthderfysgol anti-terrorists gwrthderfysgwr anti-trades gwrthwyntoedd cyson antibiotic gwrthfiotig antibiotics gwrthfiotig antibody gwrthgorff anticipate rhagdaro (in music) anticipate rhagweld (in general) anticipate response rhagweld ymateb anticipation rhagdrawiad (of musical note) anticipations rhagdrawiad (of musical note) anticlerical gwrthglerigol anticlinal anticlinol anticline anticlin anticlines anticlin anticlinorium anticlinoriwm anticlinoriums anticlinoriwm anticlockwise gwrthglocwedd anticlockwise direction cyfeiriad gwrthglocwedd anticlockwise directions cyfeiriad gwrthglocwedd anticodon gwrthgodon anticodons gwrthgodon anticyclone antiseiclon anticyclones antiseiclon anticyclonic antiseiclonig antidepressant gwrthiselydd (drug) antidepressants gwrthiselydd (drug) antidiuretic gwrthddiwretig antidiuretic hormone hormon gwrthddiwretig antidiuretic hormones hormon gwrthddiwretig antidote gwrthwenwyn antidotes gwrthwenwyn antiemetic gwrthgyfogydd (drug) antiemetics gwrthgyfogydd (drug) antiepileptic cyffur atal epilepsi (drug) antiepileptics cyffur atal epilepsi (drug) antigen antigen antigens antigen antihypertensive gwrthorbwysol (of drug) antihypotensive gwrthisbwysol (of drug) antilogarithm gwrthlogarithm antilogarithms gwrthlogarithm antimony antimoni (Sb) antinodal antinodol antinode antinod antinodes antinod antinomian antinomaidd antinomian antinomiad antinomianism antinomiaeth antinomianisms antinomiaeth antinomians antinomiad antioxidant gwrthocsidydd antioxidants gwrthocsidydd antipapal gwrth-Babaidd antiparallel gwrthbaralel antiphase gwrthwedd (out of phase) antiphon antiffon antiphons antiffon antipope gwrthbab antipopes gwrthbab antiproton antiproton antiprotons antiproton antiquarian hynafiaethol antiquary hynafiaethydd antique hynafol antique hynafolyn antique cymbals symbalau Groeg antique paper papur bras antique papers papur bras antique shop siop hen bethau antique shops siop hen bethau antiques hynafolyn antiquity hen fyd (=ancient times) antiquity hynafiaeth (of objects or customs) antiseptic antiseptig antiseptics antiseptig antisocial behaviour ymddygiad gwrthgymdeithasol antisocial behaviours ymddygiad gwrthgymdeithasol antistatic gwrthstatig antisymmetric gwrthgymesur antisymmetry gwrthgymesuredd antithesis antithesis antivivisection gwrthfywddyraniad antivivisections gwrthfywddyraniad anuria anwria anurias anwria anus anws anvil eingion anvil horn scrolls heyrn sgrôl anvils eingion anxiety pryder (non-technical usage) aorta aorta aortas aorta aortic arch bwa aortig aortic arches bwa aortig aortic body corffyn aortig apart ar wahân apartheid apartheid apartheids apartheid apartment fflat apartments fflat apathy apathi aperient carthydd aperients carthydd aperiodic digyfnod aperture agorfa apertures agorfa apetalous dibetal apex apig apexes apig apgar score chart siart sgôr apgar apgar score charts siart sgôr apgar aphasia affasia aphasias affasia aphelion affelion aphelions affelion aphid pryf glas aphids pryf glas apical apigol apical bud blaguryn apigol apical buds blaguryn apigol apical dominance trechedd apigol apical dominances trechedd apigol apical meristem meristem apigol apical meristems meristem apigol apnoea apnoea apnoeas apnoea apocalypse datguddiad apocalypses datguddiad apocalyptic apocalyptaidd apocalyptic apocalypteg apocalyptic literature llenyddiaeth apocalyptaidd apocalyptic literatures llenyddiaeth apocalyptaidd apocalyptics apocalypteg apocarpous apocarpog apocrypha apocryffa apocryphal new testament testament newydd apocryffaidd apocryphal new testaments testament newydd apocryffaidd apocryphas apocryffa apogean tide llanw apogeaidd apogean tides llanw apogeaidd apogee apoge apogees apoge apologetic diffyniadol (of reasoned defence) apologetics diffyniadaeth apologetist diffynnydd apologetists diffynnydd apology diffyniad (=defence) apology of the Commons cyfiawnhad y Senedd apophthegm doethair apophthegms doethair apoplast apoplast apoplasts apoplast aposematic rhybuddiol apostasy gwrthgiliad apostate gwrthgiliol apostate gwrthgiliwr apostates gwrthgiliwr apostle apostol apostles apostol apostleship apostoliaeth apostleships apostoliaeth apostolic apostolaidd apostolicity apostoligrwydd apostrophe collnod apostrophes collnod apoyando apoyando apparatus cyfarpar apparent amlwg (=obvious) apparent ymddangosiadol (=seeming) apparent ymddangosol (in physics) apparent motion of the moon mudiant ymddangosol y lleuad apparent movement symudiad ymddangosol apparent movements symudiad ymddangosol apparent time amser haul apparent times amser haul appeal apelio appeal apêl appeal court llys apêl appeal courts llys apêl appeals apêl appear ymddangos appearance ymddangosiad appearances ymddangosiad appease dyhuddo appeasement dyhuddiad appeasement policy polisi dyhuddo appeasements dyhuddiad appellant apelydd appellants apelydd appendicitis llid y pendics appendicular skeleton sgerbwd atodol appendicular skeletons sgerbwd atodol appendix atodiad (to a document) appendixes atodiad (to a document) appetite archwaeth appetite centre canolfannyn ymborthi appetite centres canolfannyn ymborthi appetites archwaeth appetizer blasyn appetizers blasyn appetizing blasus apple Charlotte Charlotte afal apple core craidd afal apple corer digreiddiwr afal apple corers digreiddiwr afal apple cores craidd afal apple dumpling twmplen afal apple dumplings twmplen afal apple sauce saws afal apple sauces saws afal appliance offeryn appliances offeryn applicability cymhwysedd applicable cymwys application cais (=formal request) application cymhwysiad (=the use to which something can be put) application dyfalbarhad (=diligence) application form ffurflen gais application forms ffurflen gais application of science cymhwysiad o wyddoniaeth applications cais (=formal request) applications cymhwysiad (=the use to which something can be put) applications dyfalbarhad (=diligence) applications software meddalwedd rhaglenni applications softwares meddalwedd rhaglenni applied cymhwysol (as a subject of study) applied gosod (=put on) applied art celfyddyd gymhwysol applied arts celfyddyd gymhwysol applied braid brêd gosod applied braids brêd gosod applied ethics moeseg gymhwysol applied facing wynebyn gosod applied facings wynebyn gosod applied flounce fflowns osod applied flounces fflowns osod applied force grym gosod applied forces grym gosod applied forms ffurfiau gosod applied geography daearyddiaeth gymhwysol applied lipping ymyl osod applied lippings ymyl osod applied mathematics mathemateg gymhwysol applied moulding mowldin gosod applied mouldings mowldin gosod applied ornament addurn gosod applied ornaments addurn gosod applied resist gwrthydd gosod applied resists gwrthydd gosod appliqué appliqué appliqués appliqué apply cymhwyso at (=make use of as relevant or suitable) apply gwneud cais (=make a formal request) apply rhoi (=set, put) apply ymroi (=devote oneself) apply paint peintio apply polish llathru appoggiatura appoggiatura appoggiaturas appoggiatura appointment apwyntiad (to see someone) appointment penodiad (to a post) appointments apwyntiad (to see someone) appointments penodiad (to a post) appraisal gwerthusiad appraisal procedures trefn werthuso appraisal scheme cynllun gwerthuso appraisal schemes cynllun gwerthuso appraisal system system werthuso appraisal systems system werthuso appraisals gwerthusiad appraise gwerthuso appreciate gwerthfawrogi appreciation arbrisiant (in value) appreciation gwerthfawrogiad (=favourable recognition) appreciations arbrisiant (in value) appreciations gwerthfawrogiad (=favourable recognition) apprehend dirnad (=understand) apprehend restio (=arrest) apprehension dirnadaeth (=understanding) apprehensions dirnadaeth (=understanding) apprentice prentis apprentices prentis apprenticeship prentisiaeth apprenticeships prentisiaeth appresorium apresoriwm appresoriums apresoriwm approach agosáu (=come near) approach dull (=way of dealing with person or thing) approach dyfodfa (to a house etc) approach mynd at (a person) approach ymdrin â (a matter) approach run atredeg approach run atrediad approach runs atrediad approach to history ymagwedd at hanes approaches dull (=way of dealing with person or thing) approaches dyfodfa (to a house etc) appropriate adfeddu (money, property etc) appropriate priodol (in performance criteria) appropriate accuracy manwl gywirdeb priodol appropriate activity gweithgaredd priodol appropriate behaviour ymddygiad addas appropriate behaviours ymddygiad addas appropriate decision penderfyniad priodol appropriate decisions penderfyniad priodol appropriate direction cyfeiriad priodol appropriate directions cyfeiriad priodol appropriate dress gwisg briodol appropriate evidence tystiolaeth briodol appropriate evidences tystiolaeth briodol appropriate illustration darluniad pwrpasol (=drawing) appropriate illustration eglureb bwrpasol (=explanation) appropriate illustrations darluniad pwrpasol (=drawing) appropriate illustrations eglureb bwrpasol (=explanation) appropriate method dull priodol appropriate methods dull priodol appropriate position safle priodol appropriate positions safle priodol appropriate response ymateb priodol appropriate responses ymateb priodol appropriate setting cyd-destun priodol appropriate settings cyd-destun priodol appropriate source ffynhonnell briodol appropriate sources ffynhonnell briodol appropriate use of the body defnyddio'r corff yn briodol appropriate vocabulary geirfa briodol appropriated tithe degwm adfedd appropriated tithes degwm adfedd appropriately pitched priodol o ran anhawster appropriation adfeddiad appropriations adfeddiad approval label label cymeradwyaeth approval labels label cymeradwyaeth approver trwyddedwr approvers trwyddedwr approximate bras approximate brasamcanu approximate answer ateb bras (=rough answer) approximate answers ateb bras (=rough answer) approximately tua approximation brasamcan approximations brasamcan apricot bricyllen apricots bricyllen apron ffedog apron stage llwyfan ffedog apron stages llwyfan ffedog aprons ffedog apse cromfan apses cromfan apsidal cromfannol apsidal tower tŵr cromfannol apsidal towers tŵr cromfannol aptitude tueddfryd aptitude test prawf tueddfryd aptitude tests prawf tueddfryd aptitudes tueddfryd aquarium acwariwm aquariums acwariwm aquatic dyfrol aquatic feeders bwytawyr dyfrol aquatint acwatint aquatints acwatint aqueduct traphont ddŵr aqueducts traphont ddŵr aqueous dyfrllyd aqueous humour hylif dyfrllyd aqueous humours hylif dyfrllyd aqueous silver nitrate arian nitrad dyfrllyd aqueous silver nitrates arian nitrad dyfrllyd aqueous sodium hydroxide sodiwm hydrocsid dyfrllyd aqueous sodium hydroxides sodiwm hydrocsid dyfrllyd aqueous solution hydoddiant dyfrllyd aqueous solutions hydoddiant dyfrllyd aquifer dyfrhaen aquifers dyfrhaen arab spring sbring arab arab springs sbring arab arabesque arabésg arabesques arabésg arable âr arable land tir âr arable lands tir âr arbitrariness mympwy arbitrary mympwyol arbitrary constant cysonyn mympwyol arbitrary constants cysonyn mympwyol arbitrary unit uned fympwyol arbitrary units uned fympwyol arbitrate cyflafareddu arbitration cyflafareddiad arbitrations cyflafareddiad arbitrator cyflafareddwr arbitrators cyflafareddwr arbor arbor arbor chuck crafanc arbor arbor chucks crafanc arbor arbor hole twll arbor arbor holes twll arbor arboriculture coedyddiaeth arboricultures coedyddiaeth arbors arbor arbuscule arbwsciwl arbuscules arbwsciwl arc arc arc cutting torri arc arc of contact arc gyffwrdd arc welding arc-weldio arcade arcêd arcades arcêd arch bwa (in general) arch pont (in dancing) arch pontio arch form ffurf bwa arch forms ffurf bwa arch in situ bwa rhededog archaeology archaeoleg archaic hynafol archaism hynafiaeth (in general) archaism hynafoliad (in religion) archaisms hynafiaeth (in general) archaisms hynafoliad (in religion) archangel archangel archangels archangel archbishop archesgob archbishops archesgob archduchess archdduges archduchy archddugiaeth archegonium archegoniwm archegoniums archegoniwm archer saethwr archers saethwr archery saethyddiaeth arches bwa (in general) arches pont (in dancing) archetype archdeip archetypes archdeip architect pensaer architects pensaer architectural pensaernïol architectural art celfyddyd bensaernïol architectural arts celfyddyd bensaernïol architectural style arddull pensaernïol architectural styles arddull pensaernïol architecture pensaernïaeth architectures pensaernïaeth architrave architraf architrave moulding mowldin architraf architrave mouldings mowldin architraf architraves architraf archive archif archive archifo archive record cofnod archifol archive records cofnod archifol archive tape tâp archifol archive tapes tâp archifol archives archif archiving system system archifo archiving systems system archifo archivist archifydd archivists archifydd archivolt moltas archivolts moltas arctangent gwrthdangiad arctangents gwrthdangiad arctic air aer arctig arctic airs aer arctig arctic alpine arctig alpinaidd arctic alpines arctig alpinaidd arcuate bwaog are âr (unit of area) area adran (=section or part) area ardal (=district in general) area arwynebedd (=extent or measure of a surface) area maes (=scope or range of activity) area rhanbarth (=region or tract) area network rhwydwaith ardal area networks rhwydwaith ardal area of great environmental value ardal o werth amgylcheddol mawr area of scenic attraction ardal hynod o hardd area of scenic beauty ardal â golygfeydd prydferth area of the sector arwynebedd y sector area of triangle arwynebedd triongl area sample samplu ardal area school ysgol ardal area schools ysgol ardal areal differentiation gwahaniaethiad arwynebedd areal differentiations gwahaniaethiad arwynebedd areas adran (=section or part) areas ardal (=district in general) areas arwynebedd (=extent or measure of a surface) areas maes (=scope or range of activity) areas rhanbarth (=region or tract) arena arena arenaceous tywodlyd arenas arena arene aren arenes aren areolar tissue meinwe areolaidd areolar tissues meinwe areolaidd argenine argenin argenines argenin argillaceous cleiog arginine arginin arginine side-chain ochr-gadwyn arginin arginine side-chains ochr-gadwyn arginin arginines arginin argon argon (Ar) argons argon (Ar) argument arg (=amplitude) argument ymresymiad (=reasoning) arguments arg (=amplitude) arguments ymresymiad (=reasoning) arhat arhat arhythmic arhythmig aria aria arias aria arid cras arioso arioso aristocracy pendefigaeth aristocrat pendefig aristocrats pendefig arithmetic rhifyddeg arithmetic base rhifyddeg bôn arithmetic bases rhifyddeg bôn arithmetic mean cymedr rhifyddol arithmetic means cymedr rhifyddol arithmetic overflow gorlif rhifyddol arithmetic overflows gorlif rhifyddol arithmetic shift syfliad rhifyddol arithmetic shifts syfliad rhifyddol arithmetic-logic unit uned rifyddeg-resymeg (ALU) arithmetic-logic units uned rifyddeg-resymeg (ALU) arithmetical rhifyddol arithmetical progression dilyniant rhifyddol arithmetical progressions dilyniant rhifyddol arithmetician rhifyddwr arithmeticians rhifyddwr arithmetics rhifyddeg arithmogon rhifogon arithmogons rhifogon arm arfogi (with weapons) arm braich arm breichio (in dancing) arm jump naid braich arm jumping braich-neidio arm jumps naid braich arm ladder ysgol fraich arm ladders ysgol fraich arm palette palet braich arm palettes palet braich arm walking braich-gerdded armada armada armadas armada armament industry diwydiant arfau armaments arfau armature armatwr armatures armatwr armchair cadair freichiau armchairs cadair freichiau armed neutrality niwtraliaeth arfog armhole twll llawes armhole facing wynebyn twll llawes armhole facings wynebyn twll llawes armholes twll llawes armistice cadoediad armistices cadoediad armonica armonica armonicas armonica armour arfogaeth armour bright arfloyw armoured division adran arfog armoured divisions adran arfog armoured hose arfbib armoured hoses arfbib armoured ply pren haengaled armours arfogaeth armoury ystordy arfau armpit cesail armpits cesail arms bend breichiau'n blyg arms race ras arfau arms races ras arfau arms sideways breichiau ar led arms swinging swingio'r breichiau arms upwards breichiau i fyny army byddin army division adran o'r fyddin army divisions adran o'r fyddin army officer swyddog o'r fyddin army officers swyddog o'r fyddin aroma arogl aromas arogl aromatic aromatig (in chemistry) aromatic persawrus (in general) around o amgylch arpeggio arpeggio arpeggio 6/4 chord cord 6/4 arpeggio arpeggio 6/4 chords cord 6/4 arpeggio arraign cyhuddo arrange trefnu arrangement trefniad (=preparation) arrangement trefniant (in music, building etc) arrangements trefniad (=preparation) arrangements trefniant (in music, building etc) arranger trefnydd arrangers trefnydd arras brithlen array arae arrearage ôl-ddylediaeth arrearages ôl-ddylediaeth arrears ôl-ddyled arrears of rent ôl-ddyledion rhent arrest arestiad arrest arestio arrests arestiad arris ymyl fain arrival dyfodiad (of person) arrival and departure cyrraedd a gadael arrivals dyfodiad (of person) arrive cyrraedd arrow saeth arrow diagram diagram saeth arrow diagrams diagram saeth arrowhead pen saeth arrowhead tack tac pen saeth arrowhead tacks tac pen saeth arrowheads pen saeth arrowloop agen saethu arrowloops agen saethu arrowroot arorwt arrowroots arorwt arrows saeth arsenal arfdy (=weapons store) arsenal arsenal (in geography) arsenals arfdy (=weapons store) arsenals arsenal (in geography) arsenic arsenig (As) arsenics arsenig (As) arson llosgi bwriadol art celf (short form) art celfyddyd (in full) art board bwrdd arlunio art boards bwrdd arlunio art form ffurf gelf art forms ffurf gelf art materials defnyddiau celf art package pecyn arlunio art packages pecyn arlunio art therapist therapydd celf art therapists therapydd celf art vocabulary geirfa gelf artefact arteffact artefacts arteffact arterial rhydwelïol arterial line llinell rhydweli arterial lines llinell rhydweli arterial road ffordd brifwythiennol arterial roads ffordd brifwythiennol arteriole rhydwelïyn arterioles rhydwelïyn arteriosclerosis arteriosglerosis artery prif wythïen (of communication) artery rhydweli (in anatomy) artesian well ffynnon artesaidd artesian wells ffynnon artesaidd arthropod arthropod arthropods arthropod artic skua sgiwen y gogledd artic skuas sgiwen y gogledd artichoke artisiog artichokes artisiog article erthygl articles erthygl articles of association erthyglau cymdeithasiad articles of the treaty of Rome erthyglau cytundeb Rhufain articulate canu'n lân (of instrument) articulate croyw (of speech) articulate cymalog (=jointed) articulate ymgymalu (of bones) articulate ynganu (of voice) articulate performer perfformiwr cymalog (of gymnast) articulate performers perfformiwr cymalog (of gymnast) articulated cymalog (of skeleton, vehicle) articulation canu glân (of instrument) articulation ynganiad (of voice) articulations ynganiad (of voice) artificial artiffisial (=imitating the natural) artificial gosod (of teeth, limbs) artificial gwneud (of fabricated objects) artificial harmonics cyseiniau gwneud artificial insemination semenu artiffisial artificial intelligence deallusrwydd artiffisial artificial intelligences deallusrwydd artiffisial artificial kidney aren artiffisial artificial light golau artiffisial artificial lights golau artiffisial artificial limb aelod artiffisial artificial limbs aelod artiffisial artificial manure gwrtaith artiffisial artificial manures gwrtaith artiffisial artificial marble marmor artiffisial artificial marbles marmor artiffisial artificial respiration resbiradaeth artiffisial artificial respirations resbiradaeth artiffisial artificial seasoning sychu mewn odyn artificial silk sidan gwneud artificial silks sidan gwneud artificial stone carreg ffug artificial stones carreg ffug artificial stonework gwaith cerrig ffug artificial stoneworks gwaith cerrig ffug artificial ventilation awyru artiffisial artificial whetstone carreg hogi wneud artificial whetstones carreg hogi wneud artillery magnelaeth artillery range maes tanio (=firing range) artillery ranges maes tanio (=firing range) artilleryman magnelwr artillerymans magnelwr artisan crefftwr artisan painter arlunydd gwlad artisan painters arlunydd gwlad artisans crefftwr artist arlunydd (=painter) artist artist (=practitioner of any art) artist's canvas cynfas arlunio artist's materials defnyddiau arlunio artist's reconstruction adluniad arlunydd artist's reconstructions adluniad arlunydd artistic celfydd (of natural skill) artistic intention bwriad artistig artistic intentions bwriad artistig artists arlunydd (=painter) artists artist (=practitioner of any art) arts and entertainment celfyddydau ac adloniant arête crib arêtes crib as and when necessary yn ôl yr angen as described yn ôl y disgrifiad as high as cyfuwch â as indicated by fel y dangosir gan asbestos asbestos asbestos glove maneg asbestos asbestos gloves maneg asbestos asbestos mat mat asbestos asbestos mats mat asbestos asbestos pad pad asbestos asbestos pads pad asbestos ascend esgyn ascendancy goruchafiaeth ascender esgynnwr (in general) ascender esgynnydd (in typography) ascenders esgynnwr (in general) ascenders esgynnydd (in typography) ascending esgynnol ascending colon colon esgynnol ascending colons colon esgynnol ascending order trefn esgynnol ascending orders trefn esgynnol ascending powers pwerau esgynnol ascending scale graddfa esgyn ascending scales graddfa esgyn ascension esgyniad ascensions esgyniad ascent esgyniad ascents esgyniad ascetic asgetig asceticism asgetigiaeth asceticisms asgetigiaeth ascites asgites ascorbic acid asid asgorbig ascorbic acids asid asgorbig ascribe glory to God gogoneddu Duw ascription gogoneddiad (of glory) ascriptions gogoneddiad (of glory) ascus asgws asepsis asepsis aseptic aseptig aseptic technique techneg aseptig aseptic techniques techneg aseptig asexual anrhywiol asexual reproduction atgynhyrchu anrhywiol ash lludw ash llwyrlosgi ash content cynnwys lludw ash contents cynnwys lludw ash tray blwch llwch ash tree onnen ash trees onnen ashlar carreg nadd (of stone) ashlar gwaith cerrig nadd (of masonry work) ashlar finish gorffeniad cerrig nadd ashlar finishs gorffeniad cerrig nadd ashlaring estyll croglofft (of boarding) ashlars carreg nadd (of stone) ashlars gwaith cerrig nadd (of masonry work) ashrama / aśrama ashrama / aśrama asiento asiento askew ar letraws (in carpentry) asparagine asparagin asparagines asparagin asparagus asbaragws aspartase asbartas aspartases asbartas aspartic acid asid asbartig aspartic acids asid asbartig aspect agwedd aspects agwedd aspects of dance agweddau ar ddawnsiau aspersion taenelliad (liturgical) aspersions taenelliad (liturgical) asphalt asffalt asphalts asffalt asphyxia myctod asphyxias myctod asphyxiate mygu aspic asbig aspics asbig aspirate sugno aspiration dyhead (=desire) aspiration sugniad (=drawing of breath) aspirations dyhead (=desire) aspirations sugniad (=drawing of breath) assart asart assarts asart assassin asasin assassination llofruddiaeth assassinations llofruddiaeth assassins asasin assault ymosod assault ymosodiad assault and battery ymosod a churo assaults ymosodiad assay mark nod prawf assay marks nod prawf assayable solder sodr prawf arian assayable solders sodr prawf arian assemblage casgliad assemblages casgliad assemble cydosod (=fit together) assembler cydosodydd assemblers cydosodydd assembly cydosodiad (of parts) assembly cymanfa (religious) assembly cynulliad (political) assembly gwasanaeth (in school) assembly drawing lluniad cydosod (of object) assembly drawing lluniadu cydosod (of act) assembly drawings lluniad cydosod (of object) assembly language iaith gydosod assembly languages iaith gydosod assembly line llinell gydosod assembly lines llinell gydosod assembly of notables cymanfa'r hynodion assembly plant gwaith cydosod assembly plants gwaith cydosod assembly-line production cynhyrchu llinell gydosod assertive pendant assertiveness pendantrwydd assess asesu assessment asesiad assessment arrangements trefniadau asesu assessment centre canolfan asesu assessment centres canolfan asesu assessment criterion maen prawf asesu assessment criterions maen prawf asesu assessment grid grid asesu assessment grids grid asesu assessment guide canllaw asesu assessment guides canllaw asesu assessment mode modd asesu assessment modes modd asesu assessment objective amcan asesu assessment objectives amcan asesu assessment of mobility asesu symudedd assessment plan cynllun asesu assessment plans cynllun asesu assessment tool dull asesu assessment tools dull asesu assessments asesiad assessor aseswr assessors aseswr asset ased asset turnover trosiant asedau asset turnovers trosiant asedau assets ased assign neilltuo assign particle to cell neilltuo gronyn i gell assignment aseiniad (=task allotted to a person) assignment neilltuad (=statement that allocates a value to a variable) assignments aseiniad (=task allotted to a person) assignments neilltuad (=statement that allocates a value to a variable) assimilate cymathu assimilative cymathol assimilative hyphae hyffae cymathol assimilator cymathyn assimilators cymathyn assist cynorthwyo assistance cymorth assistance exercise ymarfer cynorthwyo assistance exercises ymarfer cynorthwyo assistances cymorth assistant cynorthwyydd assistants cynorthwyydd assistantship swydd cynorthwyydd assistantships swydd cynorthwyydd assisted area ardal gynorthwyedig assisted areas ardal gynorthwyedig assisted transport cludiant cynorthwyedig assisted transports cludiant cynorthwyedig assize brawdlys assize of arms aséis arfau assizes brawdlys associate member aelod cysylltiol associate members aelod cysylltiol associate nurse nyrs gysylltiol associate nurses nyrs gysylltiol associated cysylltiol associated norm norm cysylltiol associated norms norm cysylltiol association cydgymuned (ecological) association cymdeithas (=society) association centre canolfan gydgysylltiol association centres canolfan gydgysylltiol association of ideas cymdeithasiad syniadau associations cydgymuned (ecological) associations cymdeithas (=society) associative cysylltiadol associative law deddf gysylltiadol associative laws deddf gysylltiadol associative memory cof cysylltiadol associative play chwarae cysylltiadol associative store stôr gysylltiadol associative stores stôr gysylltiadol associator niwron cysylltiol (=connector neurone) associators niwron cysylltiol (=connector neurone) assort dosrannu assorted amrywiol assorted colours lliwiau amrywiol assortment amrywiaeth assortment of materials amrywiaeth defnyddiau assortments amrywiaeth assume tybio assume flesh ymgnawdoli assumption tybiaeth assumption of flesh ymgnawdoliad assumptions tybiaeth assurance sicrwydd (=certainty) assurance yswiriant (=insurance) assurances sicrwydd (=certainty) assurances yswiriant (=insurance) astable multivibrator amlddirgrynydd gwrthsefydlog astable multivibrators amlddirgrynydd gwrthsefydlog astatine astatin (At) astatines astatin (At) asterisk seren asterisks seren asteroid asteroid asteroids asteroid asthma asthma asthmas asthma astigmatism astigmatedd astigmatisms astigmatedd astragal astragal astragal moulding mowldin astragal astragal mouldings mowldin astragal astragals astragal astral serol astride traed ar led (position) astride jump naid ar led astride jumps naid ar led astride vault llofnaid ar led astride vaults llofnaid ar led astro-mythology sêr-fytholeg astrolabe astrolab astrolabes astrolab astrolatry sêr-addoliaeth astrological sêr-ddewiniol astrology sêr-ddewiniaeth astronomy seryddiaeth astrophysics astroffiseg asymmetric anghymesur asymmetric fold plyg anghymesur asymmetric folds plyg anghymesur asymmetrical anghymesurol asymmetry anghymesuredd asymptote asymptot asymptotes asymptot asymptotic asymptotig asynchronous anghydamseredig asystole ataliad y galon asystoles ataliad y galon at a discount ar ddisgownt at a premium ar bremiwm at an angle ar ongl at an angle of 35° ar ongl 35° at home gartref at par ar lawn werth at random ar hap at risk mewn perygl at the rate of yn ôl y gyfradd o at-symbol symbol am (@) at-symbols symbol am (@) atactic atactig ataxia atacsia ataxias atacsia atheism anffyddiaeth atheisms anffyddiaeth atheist anffyddiwr atheists anffyddiwr athematic athematig atherosclerosis atherosglerosis athlete athletwr athlete in training athletwr sy'n ymarfer athletes athletwr athletic athletaidd athletic activity gweithgaredd athletaidd athletic performance perfformiad athletaidd athletic performances perfformiad athletaidd athletics athletau athletics club clwb athletau athletics clubs clwb athletau atlas atlas atman atman (Sanskrit) atmans atman (Sanskrit) atmosphere atmosffer (of gases, pressure) atmosphere awyrgylch (=mood) atmospheres atmosffer (of gases, pressure) atmospheres awyrgylch (=mood) atmospheric atmosfferig atmospheric circulation cylchrediad atmosfferig atmospheric circulations cylchrediad atmosfferig atmospheric conditions amodau atmosfferig atmospheric pollution llygredd atmosfferig atmospheric pollutions llygredd atmosfferig atmospheric pressure gwasgedd atmosfferig atmospheric pressures gwasgedd atmosfferig atmospheric process proses atmosfferig atoll atol atolls atol atom atom atomic atomig atomic mass màs atomig atomic mass number rhif màs atomig atomic mass numbers rhif màs atomig atomic number rhif atomig atomic numbers rhif atomig atomic spacing gwahaniad atomig atomic spacings gwahaniad atomig atomic structure adeiledd yr atom atomic structures adeiledd yr atom atomicity atomedd atomization atomeiddiad atomizations atomeiddiad atomize atomeiddio atomizer atomadur atomizers atomadur atoms atom atonal digywair atonalist digyweirydd atonalists digyweirydd atonality digyweiredd atone gwneud iawn atonement iawn atonements iawn atrial atrïaidd atrio-ventricular node nod atrio-fentriglaidd (AVN) atrio-ventricular nodes nod atrio-fentriglaidd (AVN) atrium atriwm atriums atriwm atrocity erchyllter atrophy crebachiad atrophy crebachu attach arestio (=arrest) attach cydio (=fasten) attached ynghlwm attached dune twyn cysylltiedig attached dunes twyn cysylltiedig attachment atodyn (=accessory) attachment cydfan (=link) attachment site cyfanbwynt attachment sites cyfanbwynt attachments atodyn (=accessory) attachments cydfan (=link) attack ymosod attack ymosodiad attack on the blade ymosod ar y llafn attack with edge ymosod â'r min attacker ymosodwr attackers ymosodwr attacking position safle ymosodol attacking positions safle ymosodol attacking stroke ergyd ymosodol attacking strokes ergyd ymosodol attacks ymosodiad attain its bounds cyrraedd ei arffiniau attainder adendriad attainders adendriad attainment cyrhaeddiad attainment keys allweddi cyrhaeddiad attainment level lefel cyrhaeddiad attainment levels lefel cyrhaeddiad attainment of objectives cyflawni amcanion attainment target targed cyrhaeddiad attainment targets targed cyrhaeddiad attainment test prawf cyrhaeddiad attainment tests prawf cyrhaeddiad attainments cyrhaeddiad attaint adendro attend mynychu (school) attend rhoi sylw (=pay attention) attendance presenoldeb attendance allowance lwfans gweini attendance allowances lwfans gweini attendance centre canolfan fynychu attendance centres canolfan fynychu attendance record cofnod mynychu attendance records cofnod mynychu attendances presenoldeb attendant keys cyweiriau perthynol attention sylw attention span cyfnod canolbwyntio attention spans cyfnod canolbwyntio attentions sylw attentiveness gallu i dalu sylw attenuate gwanhau attenuation gwanhad attenuations gwanhad attenuator gwanhadur attenuators gwanhadur attitude agwedd (of mind) attitude osgo (of aeroplane, rocks) attitudes agwedd (of mind) attitudes osgo (of aeroplane, rocks) attojoule atojoule attojoules atojoule attorney twrnai attract atynnu attraction atyniad attractions atyniad attractive atyniadol attractive atynnol (of force) attractive deniadol (=charming) attractive force grym atynnol attractive forces grym atynnol attribute priodoledd attributes priodoledd attributes and variates priodoleddau ac amryweddau attribution priodoliad attributions priodoliad attrition athreuliad attritions athreuliad au gratin au gratin aubade aubade aubades aubade aubergine planhigyn wy aubergines planhigyn wy auction sale arwerthiant auction sales arwerthiant auctioneer arwerthwr auctioneers arwerthwr audibility clywadwyedd audible clywadwy audible range amrediad clywadwy audible ranges amrediad clywadwy audience cynulleidfa audience engagement ymrwymiad cynulleidfa audience engagements ymrwymiad cynulleidfa audience expectations disgwyliadau cynulleidfa audience reception derbyniad cynulleidfa audience receptions derbyniad cynulleidfa audience survey arolwg cynulleidfa audiences cynulleidfa audio clywedol audio book llyfr llafar audio books llyfr llafar audio frequency amledd awdio audio visual aids adnoddau clyweled audiogram awdiogram audiograms awdiogram audiolingual clywieithol audiology clinic clinig clyw audiology clinics clinig clyw audiometer awdiomedr audiometers awdiomedr audiometry awdiometreg audiotyping clywdeipio audit archwiliad audit archwilio audit agency asiantaeth archwilio audit moderator cymedrolwr archwilio audit moderators cymedrolwr archwilio audit trail trywydd archwilio audit trails trywydd archwilio auditor archwiliwr auditor of accounts archwiliwr cyfrifon auditors archwiliwr auditory clybodol auditory canal tiwb y glust auditory canals tiwb y glust auditory capsule cwpan y glust auditory capsules cwpan y glust auditory discrimination gwahaniaethu sŵn auditory meatus cyntedd y glust auditory memory cof clywedol auditory nerve nerf y clyw auditory nerves nerf y clyw auditory perception canfod sŵn auditory training hyfforddiant gwrando auditory trainings hyfforddiant gwrando audits archwiliad augend awgend augends awgend auger taradr auger bit ebill taradr auger bits ebill taradr augers taradr augment estyn (in music) augment ychwanegu (=add to) augmentation estyniad (in music) augmentation ychwanegiad (=addition) augmentations estyniad (in music) augmentations ychwanegiad (=addition) augmented estynedig (in music) augmented chord cord estynedig augmented chords cord estynedig augmented interval cyfwng estynedig augmented intervals cyfwng estynedig augmented seventh chord cord y seithfed estynedig augmented seventh chords cord y seithfed estynedig augmented sixth chord cord y chweched estynedig augmented sixth chords cord y chweched estynedig augmenter ychwanegydd augmenters ychwanegydd augury darogan aulos awlos aura awra aural clywedol aural aids cymhorthion clywedol aural perception canfyddiad clywedol aural perceptions canfyddiad clywedol aural stimulation cyffroad clywedol aural stimulations cyffroad clywedol aural stimulus ysgogiad clywadwy aural work sain glust aural works sain glust auras awra aureole lleugylch aureoles lleugylch auricle awrigl auricles awrigl auricular confession cyffes gudd auricular confessions cyffes gudd aurora awrora auroral awroraidd auroras awrora austenite awstenit austenites awstenit austerity llymder autarchy awtarchiaeth autecology awtecoleg auteur auteur auteurs auteur authentic dilys authentic mode modd sylfaenol authentic modes modd sylfaenol authenticate dilysu authenticating body corff dilysu authentication dilysu authenticity dilysrwydd authigenic awthigenig author awdur authoring awduro authoring package pecyn awduro authoring packages pecyn awduro authoritarian awdurdodaidd authoritarianism awdurdodaeth authoritarianisms awdurdodaeth authoritative awdurdodol authority awdurdod authorization awdurdodiad authorizations awdurdodiad authorize awdurdodi authorized awdurdodedig authorized version fersiwn awdurdodedig authorized versions fersiwn awdurdodedig authors awdur autism awtistiaeth autisms awtistiaeth autistic awtistig autistic child plentyn awtistig autistic childs plentyn awtistig auto-analyser dadansoddydd awtomatig auto-analysers dadansoddydd awtomatig autocatalysis awtocatalysis autochthonous brodorol autoclave ffwrn aerglos autoclaves ffwrn aerglos autocorrelation hunangydberthynas autocorrelations hunangydberthynas autocracy unbennaeth autocrat unben autocratic unbenaethol autocratic empire ymerodraeth unbenaethol autocratic empires ymerodraeth unbenaethol autocratic leader arweinydd unbenaethol autocratic leaders arweinydd unbenaethol autocratic rule rheolaeth unbenaethol autocratic rules rheolaeth unbenaethol autocrats unben autogenic hunangenedledig autograph llofnod autographs llofnod autoharp telyn ddodi autoharps telyn ddodi autoimmunity awtoimiwnedd automate awtomeiddio automated system system wedi'i hawtomeiddio automated systems system wedi'i hawtomeiddio automatic awtomatig automatic centre punch pwnsh canoli awtomatig automatic centre punches pwnsh canoli awtomatig automatic cut-off torbwynt awtomatig automatic cut-offs torbwynt awtomatig automatic feed porthiant awtomatig automatic feeds porthiant awtomatig automatic gearbox gerbocs awtomatig automatic gearboxes gerbocs awtomatig automatic machine peiriant awtomatig automatic machines peiriant awtomatig automatic reciprocation cilyddu awtomatig automatic stabilizer sefydlogydd awtomatig automatic stabilizers sefydlogydd awtomatig automatic thoughts meddyliau awtomatig automatic wrap-around amlap awtomatig automatic wrap-arounds amlap awtomatig automation awtomatiaeth automation equipment offer awtomatiaeth automations awtomatiaeth automatism awtomatedd automatisms awtomatedd automobile modur automobile component cydran modur automobile components cydran modur automobiles modur automorphic awtomorffig autonomic awtonomig autonomous ymreolaethol autonomous reader darllenydd annibynnol autonomous readers darllenydd annibynnol autonomous user defnyddiwr annibynnol autonomous users defnyddiwr annibynnol autonomy ymreolaeth autopolyploid awtopolyploid autopolyploids awtopolyploid autopolyploidy awtopolyploidi autopsy awtopsi autoregression ymatchweliad autoregressions ymatchweliad autoregressive ymatchwelaidd autorepeat awtoailadrodd autosomal awtosomaidd autosome awtosom autosomes awtosom autotroph hunanborthwr autotrophs hunanborthwr autumn equinox cyhydnos yr hydref autumn equinoxes cyhydnos yr hydref auxiliary ategol (in general) auxiliary tonnog (of musical note, chord) auxiliary 6/4 chord cord 6/4 tonnog auxiliary 6/4 chords cord 6/4 tonnog auxiliary circle cylch ategol auxiliary circle method dull cylch ategol auxiliary circle methods dull cylch ategol auxiliary circles cylch ategol auxiliary elevation golwg ategol auxiliary elevations golwg ategol auxiliary equation hafaliad ategol auxiliary equations hafaliad ategol auxiliary front elevation blaenolwg ategol auxiliary front elevations blaenolwg ategol auxiliary industry diwydiant cynorthwyol auxiliary plan uwcholwg ategol (of view) auxiliary plans uwcholwg ategol (of view) auxiliary projection tafluniad ategol auxiliary projections tafluniad ategol auxiliary teacher athrawes gynorthwyol (female) auxiliary teacher athro cynorthwyol (male) auxiliary teachers athrawes gynorthwyol (female) auxiliary teachers athro cynorthwyol (male) auxiliary view golwg ategol auxiliary views golwg ategol auxin awcsin auxins awcsin availability argaeledd available ar gael available relief tirwedd leol available reliefs tirwedd leol avalanche eirlithrad avalanches eirlithrad avant-garde avant-garde avant-gardes avant-garde avarice cybydd-dod avarices cybydd-dod avaricious cybyddlyd avatar / avatara avatar / avatara avatar / avataras avatar / avatara aventurine afentwrin aventurines afentwrin avenue rhodfa avenues rhodfa average canolig (=ordinary standard) average cyfartaledd average cyfartalog (worked out mathematically) average ability gallu canolig average attainment cyrhaeddiad ar gyfartaledd average attainments cyrhaeddiad ar gyfartaledd average capital cyfalaf cyfartalog average capitals cyfalaf cyfartalog average child plentyn cyffredin average childs plentyn cyffredin average cost cost gyfartalog average costs cost gyfartalog average income incwm cyfartalog average incomes incwm cyfartalog average price pris cyfartalog average prices pris cyfartalog average product cynnyrch cyfartalog average products cynnyrch cyfartalog average propensity to consume tuedd gyfartalog i ddefnyddio average propensity to save tuedd gyfartalog i gynilo average rainfall glawiad cyfartalog average rainfalls glawiad cyfartalog average rate cyfradd gyfartalog average rate of return cyfradd adenillion gyfartalog average rates cyfradd gyfartalog average rep time amser cyfartalog ail-wneud average rep times amser cyfartalog ail-wneud average revenue refeniw cyfartalog average revenues refeniw cyfartalog average scale factor ffactor graddfa gyfartalog average scale factors ffactor graddfa gyfartalog average stock stoc gyfartalog average stocks stoc gyfartalog average temperature tymheredd cyfartalog average temperatures tymheredd cyfartalog averages cyfartaledd aviation hedfan aviation industry diwydiant awyrennau avocado pear afocado avocado pears afocado avoid osgoi avoidance behaviour ymddygiad osgoi avoidance behaviours ymddygiad osgoi avoided cadence diweddeb annisgwyl avoided cadences diweddeb annisgwyl award dyfarniad (=judgement) award dyfarnu (by referee's decision) award gwobr (=prize) award gwobrwyo (=give prize) award damages dyfarnu iawndal awarding body corff dyfarnu awards dyfarniad (=judgement) awards gwobr (=prize) awareness ymwybyddiaeth awareness of space ymwybyddiaeth o ofod awareness of the dangers ymwybyddiaeth o beryglon awayswinger gwyriad allan awayswingers gwyriad allan awkward lletchwith awl mynawyd awn col axe bwyell axe head pen bwyell axe heads pen bwyell axes of reference echelinau lleoli axial echelinol axial plane plân echelinol axial planes plân echelinol axial skeleton sgerbwd echelinol axial skeletons sgerbwd echelinol axial trajectory taflwybr echelinol axil cesail axillary ceseilaidd axillary bud blaguryn ceseilaidd axillary buds blaguryn ceseilaidd axils cesail axiom gwireb axiomatic gwirebol axioms gwireb axis acsis (of bone in psychology) axis echelin (of line) axis of fold echelin plyg axis of symmetry echelin cymesuredd axle echel axle pulley echel bwli axles echel axon acson axon hillock bryncyn acson axon hillocks bryncyn acson axons acson ayah ayah ayahs ayah ayre ayre ayres ayre azeotrope aseotrop azeotropes aseotrop azimuth asimwth azimuthal projection tafluniad asimwthol azimuthal projections tafluniad asimwthol azimuths asimwth azo dye llifyn aso azo dyes llifyn aso azomethane asomethan azomethanes asomethan azonal anaeddfed azygotic asygotig babbitt metal metel babbitt babbitt metals metel babbitt babbling clebran baban (in development of children's speech) baby buggy coets baban baby lotion trwyth baban baby lotions trwyth baban baby massage tylino baban baby signing arwyddo baban baby-walker cerddwr baby-walkers cerddwr babygro dilledyn babygro babyhood babandod babyhoods babandod babysit gwarchod babysitter gwarchodwr babysitters gwarchodwr baccalaureate bagloriaeth baccalaureates bagloriaeth back cefn (in general) back olwr (of person) back rhoi cefnyn (in needlework) back arrow saeth yn ôl back arrows saeth yn ôl back bench mainc gefn back benches mainc gefn back board cefnfwrdd back boards cefnfwrdd back bodice bodis cefn back bodices bodis cefn back drop cefnlen back drops cefnlen back electromotive force ôl-rym electromotif back electromotive forces ôl-rym electromotif back facing wynebyn cefn back facings wynebyn cefn back fill ôl-lenwi back iron haearn cefn back irons haearn cefn back mutation ôl-fwtaniad back mutations ôl-fwtaniad back opening agoriad cefn back openings agoriad cefn back pay ôl-dâl back roller rholer ôl back rollers rholer ôl back row rheng ôl back rows rheng ôl back screen sgrin gefn back screens sgrin gefn back sight ôl-olwg back sights ôl-olwg back spring sbring cefn back springs sbring cefn back stick ffon wasgu (spinning) back sticks cefn ffyn (in hockey) back sticks ffon wasgu (spinning) back stitch pwyth ôl back stitches pwyth ôl back stop stop cefn back stops stop cefn back to back cefn wrth gefn (do-si-do) back to back cefngefn (of houses) back to back houses tai cefngefn back vault llofnaid gefn back vaults llofnaid gefn back view cefnlun back views cefnlun back wall mur cefn back wall out of court line ffin gefn back walls mur cefn back-heel ôl-sodli back-payment ôl-daliad back-payments ôl-daliad back-up cefnogaeth (=support) back-up wrth gefn back-up copy copi wrth gefn back-up support ategiad back-up supports ategiad back-ups cefnogaeth (=support) backbearing ôl-gyfeiriad backbearings ôl-gyfeiriad backboard bwrdd cefn backboards bwrdd cefn backbone asgwrn cefn backbones asgwrn cefn backcloth cefnlen backcloths cefnlen backcrawl nofio ar y cefn backcross ôl-groesiad backend processor ôl-brosesydd backend processors ôl-brosesydd backfire tanio'n ôl backflap hinge colfach llydan backflap hinges colfach llydan backflow ôl-lifiad backflows ôl-lifiad background cefndir background count cyfrif cefndir background count rate cyfradd cyfrif cefndir background count rates cyfradd cyfrif cefndir background counts cyfrif cefndir background enamel enamel cefndir background enamels enamel cefndir background heat gwres cefndir background heats gwres cefndir background music cerddoriaeth gefndir background musics cerddoriaeth gefndir background process proses gefndir background processing prosesu cefndir background punch pwnsh cefndir background punches pwnsh cefndir background study astudiaeth gefndir backgrounds cefndir backhand gwrthlaw backhand side ochr wrthlaw backhand sides ochr wrthlaw backhand stroke ergyd wrthlaw backhand strokes ergyd wrthlaw backhands gwrthlaw backing cefnogaeth (=support) backing cefnyn (material) backing cyfeiliant (=musical accompaniment) backing cymorth cefn (tambour door) backing gwrthwyro (of wind) backing board bwrdd cefnu backing boards bwrdd cefnu backing hammer morthwyl cefnu backing hammers morthwyl cefnu backing off cefnu backing sheet dalen gefnu backing sheets dalen gefnu backing store storfa gynorthwyol backing stores storfa gynorthwyol backings cefnogaeth (=support) backings cefnyn (material) backings cyfeiliant (=musical accompaniment) backings cymorth cefn (tambour door) backland cefnwlad (=hinterland) backlands cefnwlad (=hinterland) backlash adlach backlashs adlach backplate cefnblat backplates cefnblat backrest cefnell backrests cefnell backs cefn (in general) backs olwr (of person) backsaw llif gefn backsaws llif gefn backshore cefndraeth backshores cefndraeth backslope cefnlethr backslopes cefnlethr backspace olio backspin troelli o dan y bêl backstitch ôl-bwyth backstitches ôl-bwyth backstroke nofio ar y cefn backwall cefnfur backwalls cefnfur backward annatblygedig (=primitive) backward araf (=slow) backward yn ôl (of movement) backward area ardal arafgynnydd backward areas ardal arafgynnydd backward chaining cadwyno'n ôl backward child plentyn araf backward childs plentyn araf backward hanging hongian ôl backward point ôl-bwynt backward points ôl-bwynt backward reaction ôl-adwaith backward reactions ôl-adwaith backward roll rhôl yn ôl backward rolls rhôl yn ôl backward spring naid yn ôl backward springs naid yn ôl backward tilt gogwyddo'n ôl backwardness arafwch backwards wysg y cefn (=with the back foremost) backwash tynddwr backwashs tynddwr backwasting ôl-ddarfodiant backwastings ôl-ddarfodiant backwater merddwr backwaters merddwr backwoods gwylltgoed bacon cig moch bacon rind crofen bacon rinds crofen baconer mochyn bacwn baconers mochyn bacwn bacons cig moch bacterial bacteriol bactericidal bacterioleiddiol bacteriologist bacteriolegydd bacteriologists bacteriolegydd bacteriology bacterioleg bacteriophage bacterioffag bacteriophages bacterioffag bacteriostat bacteriostat bacteriostatic bacteriostatig bacteriostatic gwrthfacteria (finish) bacteriostats bacteriostat bacterium bacteriwm bacteriums bacteriwm bad practice arfer gwael bad practices arfer gwael badge bathodyn badge reader darllenydd bathodynnau badge readers darllenydd bathodynnau badges bathodyn badland garwdirol badlands garwdiroedd badminton badminton badmintons badminton bag bag bagatelle bagatelle bagatelles bagatelle bagpipe bacbib bagpipes bacbib bail caten (of cricket stumps) bail mechnïaeth bailey beili bails caten (of cricket stumps) bails mechnïaeth bain-marie bain-marie bain-maries bain-marie baize beias baizes beias bake pobi bake blind pobi'n wag baked apple afal pob baked apples afal pob baked beans ffa pob baked enamel enamel cras baked enamels enamel cras baker pobydd bakers pobydd bakestone maen bakestones maen baking powder powdr codi baking powders powdr codi baking tin tun pobi baking tins tun pobi balalaika balalaica balalaikas balalaica balance cadw cydbwysedd (=keep equilibrium) balance clorian (for weighing) balance cloriannu (=measure mass) balance cydbwysedd (=equilibrium) balance cydbwyso (=create equilibrium) balance gweddill (of money) balance mantoli (financial transactions) balance an equation cydbwyso hafaliad balance due balans dyledus balance dues balans dyledus balance flue simnai gytbwys balance flues simnai gytbwys balance line llinell gydbwysedd balance lines llinell gydbwysedd balance marks marciau cydbwysedd balance of community cydbwysedd cymuned balance of nature cydbwysedd natur balance of payments mantol daliadau balance of power cydbwysedd grym balance of trade mantol fasnach balance point pwynt cydbwysedd balance points pwynt cydbwysedd balance sheet mantolen balance sheets mantolen balance support ymgynnal cytbwys (in athletics) balance the accounts mantoli'r cyfrifon balance wheel olwyn cydbwysedd (of machine part) balance wheels olwyn cydbwysedd (of machine part) balanced cytbwys balanced bilingual cytbwys ddwyieithog balanced budget cyllideb fantoledig balanced budgets cyllideb fantoledig balanced diet deiet cytbwys balanced diets deiet cytbwys balanced economy economi cytbwys balanced flue ffliw gytbwys balanced flues ffliw gytbwys balanced forces grymoedd cytbwys balanced intake derbyn nifer cytbwys balanced judgement barn gytbwys balanced judgements barn gytbwys balanced shape ffurf gytbwys balanced shapes ffurf gytbwys balanced step gris cytbwys balanced steps gris cytbwys balanced swell pedal chwyddbedal cytbwys balanced swell pedals chwyddbedal cytbwys balancer veneer argaen cydbwyso balancer veneers argaen cydbwyso balances clorian (for weighing) balances cydbwysedd (=equilibrium) balances gweddill (of money) balancing cydbwysol balancing mechanism mecanwaith cydbwysol balancing mechanisms mecanwaith cydbwysol balancing skill sgìl cydbwyso balancing skills sgìl cydbwyso balcony balconi bale bwrn bale loader codwr byrnau bale loaders codwr byrnau baler byrnwr balers byrnwr bales bwrn ball pelen (single delivery of) ball pellen (of wool etc) ball pêl (to play with) ball and claw foot troed pelen a chrafanc ball and claw foots troed pelen a chrafanc ball and socket joint cymal pelen a chrau ball and socket joints cymal pelen a chrau ball boy bachgen y bêl ball castor castor pêl ball castors castor pêl ball catch clicied bêl ball catches clicied bêl ball clay clai pêl ball foot troed bêl ball foots troed bêl ball girl merch y bêl ball girls merch y bêl ball mill melin bêl ball mills melin bêl ball of the foot pelen y droed ball peen wyneb crwn ball peen hammer morthwyl wyneb crwn ball peen hammers morthwyl wyneb crwn ball peens wyneb crwn ball pointed bodkin botgin pengrwn ball pointed bodkins botgin pengrwn ball valve pêl-falf ball valves pêl-falf ball-bearing pelferyn ball-bearing runner rhedwr pelferyn ball-bearing runners rhedwr pelferyn ball-bearings pelferyn ball-head stake bonyn pengrwn ball-head stakes bonyn pengrwn ball-point needle nodwydd belenbwynt ball-point needles nodwydd belenbwynt ball-winner enillydd y bêl ball-winners enillydd y bêl ballad baled ballad opera opera faled ballad operas opera faled ballade ballade ballades ballade ballads baled ballet bale ballet chorus dawnsgor bale ballet dancer dawnsiwr bale ballet dancers dawnsiwr bale ballet mistress meistres y bale ballet music cerddoriaeth fale ballet musics cerddoriaeth fale ballets bale ballett balet (song) balletts balet (song) ballistic balistig ballistic missile taflegryn balistig ballistic missiles taflegryn balistig ballistics balisteg balloon balŵn balloon framing ffrâm falŵn balloon framings ffrâm falŵn balloons balŵn ballroom dance dawns neuadd ballroom dances dawns neuadd balls pelen (single delivery of) balls pellen (of wool etc) balls pêl (to play with) balsa balsa balsa cement sment balsa balsa cements sment balsa balsa wood pren balsa balsa woods pren balsa balsas balsa baluster balwster balusters balwster balustrade balwstrad balustrades balwstrad bamboo bambŵ bamboo cane cansen fambŵ bamboo canes cansen fambŵ banana banana bananas banana band band band corlannu (in computing) band nipper niper bandio band nippers niper bandio band spectrum sbectrwm band band spectrums sbectrwm band band stitch pwyth band band stitches pwyth band bandage rhwymo bandage rhwymyn bandages rhwymyn banded bandog banding bandin banding menu dewislen gorlannu banding menus dewislen gorlannu banding wheel olwyn fandio banding wheels olwyn fandio bandings bandin bands band bandsaw cylchlif bandsaws cylchlif banister canllaw grisiau banister brush brwsh canllaw grisiau banister brushs brwsh canllaw grisiau banisters canllaw grisiau banjo banjo bank banc (for money) bank clawdd (of earth) bank glan (of river) bank account cyfrif banc bank accounts cyfrif banc bank balance balans yn y banc bank balances balans yn y banc bank branch cangen banc bank branches cangen banc bank charges treuliau banc bank loan benthyciad banc bank loans benthyciad banc bank manager rheolwr banc bank managers rheolwr banc bank of drawers banc o ddroriau bank rate cyfradd banc bank rates cyfradd banc bank reserve cronfa banc bank reserves cronfa banc bank statement cyfriflen bank statements cyfriflen banker's order archeb banc banker's orders archeb banc bankful cyforlan bankfuls cyforlan banking bancio banking centre canolfan fancio banking centres canolfan fancio banking industry diwydiant bancio banking system cyfundrefn fancio banking systems cyfundrefn fancio banking up anhuddo (fire) banknotes arian papur bankrupt methdalwr (person) bankruptcy methdaliad bankruptcy court llys methdaliad bankruptcy courts llys methdaliad bankrupts methdalwr (person) banks banc (for money) banks clawdd (of earth) banks glan (of river) banner pennawd bras (headline) banner advert hysbyseb fras banner adverts hysbyseb fras banners pennawd bras (headline) bantam weight pwysau bantam baptism bedydd baptismal font bedyddfaen baptismal fonts bedyddfaen baptisms bedydd baptistry bedyddfa bar bar bar chart siart bar bar charts siart bar bar feed porthiant bar (mechanism) bar feeds porthiant bar (mechanism) bar graph graff bar bar graphs graff bar bar height uchder y bar bar heights uchder y bar bar magnet barfagnet bar magnets barfagnet bar tack tac cynnal bar tacks tac cynnal bar vocational course cwrs galwedigaethol y bar bar vocational courses cwrs galwedigaethol y bar barathea barathea baratheas barathea barb adfach barbola barbola barbola paste past barbola barbola pastes past barbola barbola varnish farnais barbola barbola varnishs farnais barbola barbola work gwaith barbola barbola works gwaith barbola barbolas barbola barbs adfach barbule adfachyn barbules adfachyn barcarolle barcaról barcarolles barcaról barchan barchan barchans barchan bare noeth bare wire gwifren noeth bare wires gwifren noeth barefaced mortise and tenon mortais a thyno unysgwyddog barefaced tenon tyno unysgwyddog barefaced tenons tyno unysgwyddog barefoot troednoeth barette barette barettes barette bargain bargen bargains bargen barge hyrddiad (in sport) barge hyrddio (in sport) barge ysgraff (=type of boat) barge-board astell dywydd barge-boards astell dywydd barges hyrddiad (in sport) barges ysgraff (=type of boat) baritone bariton baritone-clef allwedd y bariton baritone-clefs allwedd y bariton baritones bariton barium bariwm (Ba) bariums bariwm (Ba) bark rhisgl (of tree) barks rhisgl (of tree) barley haidd barley bread bara haidd barley breads bara haidd barley seeds hadau haidd barley water dŵr haidd barley waters dŵr haidd barline llinell bar (in music) barlines llinell bar (in music) barnacle cragen long barnacle gŵydd fôr barnacles cragen long barnacles gŵydd fôr barogram barogram barograms barogram barograph barograff barographs barograff barometer baromedr barometers baromedr barometric barometrig barometric gradient graddiant barometrig barometric gradients graddiant barometrig barometric tendency tueddiad barometrig baron barwn baronetcy barwnigaeth baronial barwnol barons barwn barony barwni baroque baróc baroque art celfyddyd faróc baroque arts celfyddyd faróc barrack block rhes o farics barrack blocks rhes o farics barrack building adeilad barics barrack buildings adeilad barics barracks barics barrage bared barrages bared barre barre barred door drws barrog barred doors drws barrog barrel baril (=cylindrical tube) barrel casgen (=cask) barrel bolt barilfollt barrel bolts barilfollt barrel cam cam baril barrel cams cam baril barrel ceiling nenfwd baril barrel ceilings nenfwd baril barrel organ organ gelwrn barrel organs organ gelwrn barrel printer argraffydd celwrn barrel printers argraffydd celwrn barrel spring sbring baril barrel springs sbring baril barrel vault pont faril barrel vaults pont faril barrels baril (=cylindrical tube) barrels casgen (=cask) barren diffrwyth barres barre barricade baricêd barricades baricêd barrier rhwystr (=obstacle) barrier beach bardraeth barrier beaches bardraeth barrier cream eli rhwystrol barrier creams eli rhwystrol barrier lake barlyn barrier lakes barlyn barrier method dull rhwystrol barrier methods dull rhwystrol barrier nursing nyrsio rhwystrol barrier reef barriff barrier reefs barriff barrier to entry rhwystr mynediad barrier to participation rhwystr sy'n atal pobl rhag cymryd rhan barriers rhwystr (=obstacle) barriers to communication rhwystrau i gyfathrebu barrister bargyfreithiwr barristers bargyfreithiwr barrow berfa (=wheelbarrow) barrow crug (=burial mound) barrows berfa (=wheelbarrow) barrows crug (=burial mound) barter ffeirio barysphere barysffer baryspheres barysffer barytite x-ray plaster plastr gwrthymbelydrol barytite x-ray plasters plastr gwrthymbelydrol baryton baryton barytons baryton bas-relief cerfwedd isel bas-reliefs cerfwedd isel basal gwaelodol basal body corffyn gwaelodol basal metabolism metabolaeth waelodol basal metabolisms metabolaeth waelodol basal sapping gwaelod-danseilio basalt basalt basalt ware crochenwaith basalt basalt wares crochenwaith basalt basalts basalt base bas (in chemistry, also in baseball) base bôn (in arithmetic, also of hedge, tree) base canolfan (=headquarters) base gwaelod (=bottom) base sail (of triangle) base sylfaen (of pyramid) base angle ongl sail base angles ongl sail base coat haen sail base coats haen sail base current cerrynt y sail base currents cerrynt y sail base level gwaelodfa base levels gwaelodfa base map map sylfaen base maps map sylfaen base moulding addurn gwaelod base mouldings addurn gwaelod base of scrum bôn y sgrym base period cyfnod sail base periods cyfnod sail base sequence dilyniant bas base sequences dilyniant bas base strength cryfder bas base strengths cryfder bas base-acid bas-asid base-acids bas-asid based on seiliedig ar based on geometrical shapes seiliedig ar ffurfiau geometrig based on texture seiliedig ar wead baseline llinell gefn (in tennis) baseline man cychwyn (=starting point) baseline data data gwaelodlin baselines llinell gefn (in tennis) baselines man cychwyn (=starting point) baseman baswr basemans baswr basement islawr basement membrane pilen waelodol basement membranes pilen waelodol basements islawr bases bas (in chemistry, also in baseball) bases bôn (in arithmetic, also of hedge, tree) bases canolfan (=headquarters) bases gwaelod (=bottom) bases sail (of triangle) bases sylfaen (of pyramid) basic Bessemer process proses fasig Bessemer basic action gweithrediad sylfaenol basic actions gweithrediad sylfaenol basic calculator cyfrifiannell sylfaenol basic calculators cyfrifiannell sylfaenol basic colour lliw sylfaenol basic colours lliw sylfaenol basic competence cymhwysedd sylfaenol basic competences cymhwysedd sylfaenol basic constituent cyfansoddyn sylfaenol basic construction adeiladwaith sylfaenol basic constructions adeiladwaith sylfaenol basic curriculum cwricwlwm sylfaenol basic curriculums cwricwlwm sylfaenol basic difference gwahaniaeth sylfaenol basic differences gwahaniaeth sylfaenol basic family teulu sylfaenol basic feasible solution datrysiad dichonadwy sylfaenol (bfs) basic feasible solutions datrysiad dichonadwy sylfaenol (bfs) basic form ffurf sylfaenol basic forms ffurf sylfaenol basic ground plan cynllun llawr sylfaenol basic ground plans cynllun llawr sylfaenol basic human need angen dynol sylfaenol basic human needs angen dynol sylfaenol basic industry diwydiant sylfaen basic lower body exercise ymarfer sylfaenol i'r corff isaf basic lower body exercises ymarfer sylfaenol i'r corff isaf basic material defnydd sylfaenol basic materials defnydd sylfaenol basic movement symudiad sylfaenol basic movements symudiad sylfaenol basic on-line system system ar-lein sylfaenol basic on-line systems system ar-lein sylfaenol basic open hearth process proses fasig tân agored basic pattern patrwm sylfaenol basic patterns patrwm sylfaenol basic rate cyfradd sylfaenol basic rates cyfradd sylfaenol basic recipe rysáit sylfaenol basic recipes rysáit sylfaenol basic rock craig fasig basic rocks craig fasig basic salary cyflog sylfaenol basic sight vocabulary geirfa weledol sylfaenol basic size maint sylfaenol basic sizes maint sylfaenol basic skill sgìl sylfaenol basic skills sgìl sylfaenol basic slag slag basig basic slags slag basig basic subject pwnc sylfaen basic subjects pwnc sylfaen basic surveying calculations cyfrifiadau syrfeo sylfaenol basic unit of charge uned sylfaenol gwefr basic upper body exercise ymarfer sylfaenol i'r corff uchaf basic upper body exercises ymarfer sylfaenol i'r corff uchaf basic vocabulary geirfa sylfaenol basic wage cyflog sylfaenol basic wages cyflog sylfaenol basicity basigedd basidiomycete basidiomycet basidiomycetes basidiomycet basidiospore basidiosbor basidiospores basidiosbor basidium basidiwm basidiums basidiwm basil basil basilica basilica basilicas basilica basils basil basin basn basin and range country tir basn a chadwyn basin of reception basn derbyn basins basn basipetal basipetalaidd basis sail basket basged basket frame ffrâm fasged basket frames ffrâm fasged basket handle dolen fasged basket handles dolen fasged basket maker gwneuthurwr basgedi basket makers gwneuthurwr basgedi basket weave gwead basged basket weaves gwead basged basket work basgedwaith basket works basgedwaith basketball pêl-fasged basketballs pêl-fasged basketry gwaith basged baskets basged basophil basoffil basophilic basoffilig basophils basoffil bass bas (of voice, instrument) bass draenogiad y môr (sea perch) bass boost atgyfnerthiad bas bass boosts atgyfnerthiad bas bass clarinet clarinét bas bass clarinets clarinét bas bass clarinettist bas-glarinetydd bass clarinettists bas-glarinetydd bass clef cleff bas bass clefs cleff bas bass cut toriad bas bass cuts toriad bas bass drum drwm bas bass drums drwm bas bass flute ffliwt fas bass flutes ffliwt fas bass horn corn bas bass horn player canwr corn bas bass horn players canwr corn bas bass horns corn bas bass trombonist bas-drombonydd bass trombonists bas-drombonydd bass trumpet utgorn bas bass trumpets utgorn bas bass viol feiol fas bass viols feiol fas bass-bar basfar (=piece of wood inside belly of violin) bass-bars basfar (=piece of wood inside belly of violin) basset horn corn baset basset horn clarinet clarinét tenor basset horn clarinets clarinét tenor basset horn player canwr corn baset basset horn players canwr corn baset basset horns corn baset basso ostinato basso ostinato bassoon basŵn bassoonist baswnydd bassoonists baswnydd bassoons basŵn bast bast bastard cut toriad bastard bastard cut file ffeil fastard bastard cut files ffeil fastard bastard cuts toriad bastard bastard feudalism ffug ffiwdaliaeth bastard feudalisms ffug ffiwdaliaeth bastard file ffeil fastard bastard files ffeil fastard baste brasbwytho (in needlework) baste brasteru (in cooking) bastide bastid bastides bastid basting stitch brasbwyth basting stitches brasbwyth basts bast bat bat bat batio batch swp batch baking pobiad batch bakings pobiad batch culture swp-feithrin batch culture fermenter eplesydd swp-feithrin batch culture fermenters eplesydd swp-feithrin batch processing swp-brosesu batch production swp-gynhyrchu batch reactor swp-adweithydd batch reactors swp-adweithydd batches swp bath baddon bath bathio bath building baddondy bath buildings baddondy bathe golchi bathe ymolch bathing costume gwisg nofio bathing costumes gwisg nofio batholith batholith batholithic batholithig batholiths batholith bathroom ystafell ymolch bathroom cabinet cabinet ystafell ymolch bathroom cabinets cabinet ystafell ymolch bathroom suite unedau ystafell ymolch bathrooms ystafell ymolch baths baddon bathyal zone cylchfa fathyal bathyal zones cylchfa fathyal bathygraph bathygraff bathygraphs bathygraff bathymetric bathymetrig bathymetry bathymetreg bathysphere bathysffer bathyspheres bathysffer batik batic batik dyeing llifo batic batik wax cwyr batic batik waxes cwyr batic batiks batic baton batwn batons batwn batsman batiwr batsmans batiwr battalion bataliwn battalions bataliwn battels bateloedd batten astell batten estyllu batten board astell stribed batten boards astell stribed battens astell batter cytew (for coating food) batter ôl-ogwydd (of slope of wall, hedge) batter rails rheiliau goleddf battered baby baban wedi'i guro battered wife gwraig gleisiog battered wifes gwraig gleisiog batters cytew (for coating food) batters ôl-ogwydd (of slope of wall, hedge) battery batri battery egg wy batri battery eggs wy batri battery hen iâr fatri battery hens iâr fatri batting crease cris batio batting creases cris batio batting glove maneg fatio batting gloves maneg fatio batting technique techneg batio batting techniques techneg batio battle brwydr battle axe cadfwyell battle axes cadfwyell battle cry rhyfelgri battle of Lepanto brwydr Lepanto battle of the gauges brwydr lled y cledrau battle order trefn y gad battle orders trefn y gad battlefield maes brwydr battlefields maes brwydr battlements bylchfuriau (=parapet) battlements murfylchau (=crenellations) battles brwydr battleship llong ryfel battleships llong ryfel batwing sleeve llawes ystlum batwing sleeves llawes ystlum baud baud baud rate cyfradd baud baud rates cyfradd baud bauds baud baulk trawst bras baulks trawst bras bauxite bocsit bauxite brick bricsen focsit bauxite bricks bricsen focsit bauxites bocsit bay bae bay bar bar bae bay bars bar bae bay window ffenestr grom bay windows ffenestr grom bay-head beach cildraeth bay-head beaches cildraeth bayleaf deilen llawryf bayleafs deilen llawryf bayonet bidog bayonets bidog bazaar basar bazaars basar beach traeth beach material defnyddiau traeth beaches traeth beachhead blaenlaniad beachheads blaenlaniad beachwear dillad traeth beacon ban (=high place) beacon goleufa (=warning or guiding light) beacon tŵr (=tower) beacons ban (=high place) beacons goleufa (=warning or guiding light) beacons tŵr (=tower) bead glain bead gleinio bead and butt panel panel glain ac ymyl bead and butt panels panel glain ac ymyl bead and reel glain a rîl bead moulding mowldin glain bead mouldings mowldin glain bead trimming addurn glain bead trimmings addurn glain beaded esker esgair gnapiog beaded eskers esgair gnapiog beadhouse betws beadhouses betws beading gleinwaith beading needle nodwydd gleinwaith beading needles nodwydd gleinwaith beadings gleinwaith beadle bedel beadles bedel beads glain beadsman paderwr beadsmans paderwr beadwork gleinwaith beadworks gleinwaith beak pig beaker bicer beaker folk bicerwyr beakers bicer beaks pig beam paladr (of light) beam trawst (of wood, metal etc) beam balance clorian drawst beam balances clorian drawst beam engine peiriant trawst beam engines peiriant trawst beam in situ trawst sefydlog beam saddle cyfrwy trawst beam saddles cyfrwy trawst beams paladr (of light) beams trawst (of wood, metal etc) bean ffeuen bean bag bag ffa (for throwing) bean bag sach eistedd (for sitting on) bean bags bag ffa (for throwing) bean bags sach eistedd (for sitting on) bean sprouts egin ffa beans ffeuen beard barf beards barf bearer cynhalydd (drawer) bearer rail rheilen gynnal bearer rails rheilen gynnal bearers cynhalydd (drawer) bearing beryn (mechanical) bearing line cyfeirlin bearing lines cyfeirlin bearing rest gorffwysfan beryn bearing rests gorffwysfan beryn bearing shell cragen feryn bearing shells cragen feryn bearings beryn (mechanical) bearings cyfeiriad (=position, orientation) beast of burden anifail pwn beat curiad beat curo beat frequency amledd curiad beat frequency oscillator osgiliadur amledd curiad beat frequency oscillators osgiliadur amledd curiad beaten metalwork gwaith morthwyl beaten metalworks gwaith morthwyl beater curwr beaters curwr beating tacio (in sailing) beating time curo amser beats curiad beaumontage beaumontage beaumontages beaumontage beauty harddwch bechamel sauce saws bechamel bechamel sauces saws bechamel bed gwely (in general) bed gwelyo bed haen (=stratum) bed chamber siambr wely bed chambers siambr wely bed jacket siaced wely bed jackets siaced wely bed linen dillad gwely bed-wetting gwlychu gwely bedding dillad gwely (=bedclothes) bedding haenau (of strata) bedding haenol (of strata) bedding plane plân haenu bedding planes plân haenu bedpan padell wely bedpans padell wely bedrest gorffwys gwely bedrests gorffwys gwely bedridden gorweddog bedrock creigwely bedrocks creigwely bedroom ystafell wely bedrooms ystafell wely bedsitter fflat un ystafell bedsitters fflat un ystafell bedsock hosan wely bedsocks hosan wely bedsore briw gorwedd bedsores briw gorwedd bedspread cwrlid bedspreads cwrlid bedways cledrau (lathe) beech ffawydden beech mallet gordd ffawydd beech mallets gordd ffawydd beech tree ffawydden beech trees ffawydden beech wood pren ffawydd beech wood mallet gordd bren ffawydd beech wood mallets gordd bren ffawydd beech woods pren ffawydd beeches ffawydden beef cig eidion beef extract rhin cig eidion beef extracts rhin cig eidion beef olives olifau cig eidion beef tea te cig eidion beef teas te cig eidion beefburger eidionyn beefburgers eidionyn beefs cig eidion beer cwrw beers cwrw beeswax cwyr gwenyn beeswax polish llathrydd cwyr gwenyn beeswax polishs llathrydd cwyr gwenyn beeswaxes cwyr gwenyn beet sugar siwgr betys beet sugars siwgr betys beetle chwilen beetles chwilen beetroot betysen beetroots betysen before o flaen before tax cyn tynnu treth beggar cardotyn beggars cardotyn begin dechrau beginner dechreuwr beginners dechreuwr beginning dechrau beginnings dechrau behaviour ymddygiad behaviour difficulties anawsterau ymddygiad behaviour objectives amcanion ymddygiad behaviour policy polisi ymddygiad behaviour therapy therapi ymddygiad behavioural ymddygiadol behavioural evidence tystiolaeth ymddygiadol behavioural evidences tystiolaeth ymddygiadol behavioural problems problemau ymddygiad behavioural psychology seicoleg ymddygiad behavioural theory damcaniaeth ymddygiad behavioural unit uned ymddygiad behavioural units uned ymddygiad behaviourism ymddygiadaeth behaviourisms ymddygiadaeth behaviours ymddygiad beheaded stream ffrwd bengoll beheaded streams ffrwd bengoll being bod being cared for o dan ofal beings bod bel bel belay belai belfry clochdy belief credo belief system system cred belief systems system cred beliefs credo believe credu believer's baptism bedydd cred believer's baptisms bedydd cred bell cloch bell chuck crafanc gloch bell chucks crafanc gloch bell harp telyn glychsain bell harps telyn glychsain bell metal metel cloch bell metals metel cloch bell pit pwll cloch bell pits pwll cloch bell punch pwnsh cloch bell punches pwnsh cloch bell sleeve llawes gloch bell sleeves llawes gloch bell tower clochdy bell towers clochdy bell-jar clochen bell-jars clochen bellows megin bells cloch belly bol (of instrument) belly pork porc bol belly porks porc bol belly-dancer boladdawnswraig belly-dancers boladdawnswraig below the belt dan y belt belt ardal (=area) belt belt (on machine) belt gwregys (for wearing, also of encircling land) belt llain (=strip of land) belt rhanbarth (=region) belt carrier dolen belt belt carriers dolen belt belt coupling cyplydd belt belt couplings cyplydd belt belt dressing dresin belt belt dressings dresin belt belt pouch pwrs gwregys belt pouches pwrs gwregys belt pulley pwli belt belt rivet rhybed belt belt rivets rhybed belt belt sander sandiwr belt belt sanders sandiwr belt belt screw sgriw belt belt screws sgriw belt belt shifter symudydd belt belt shifters symudydd belt belt stretcher estynnwr belt belt stretchers estynnwr belt belt tightener tynhawr belt belt tighteners tynhawr belt belts ardal (=area) belts belt (on machine) belts gwregys (for wearing, also of encircling land) belts llain (=strip of land) belts rhanbarth (=region) bench mainc bench drill dril mainc bench drilling machine peiriant drilio mainc bench drilling machines peiriant drilio mainc bench drills dril mainc bench end ystlys mainc bench end vice feis ben mainc bench end vices feis ben mainc bench ends ystlys mainc bench grinder llifanydd mainc bench grinders llifanydd mainc bench holdfast dalbren mainc bench holdfasts dalbren mainc bench hook bachyn mainc bench hooks bachyn mainc bench jump naid fainc bench jumps naid fainc bench plane plaen mainc bench planes plaen mainc bench rib asen y fainc bench ribs asen y fainc bench shears gwellaif mainc bench stop rhagod bench stops rhagod bench tools offer mainc bench vice feis fainc bench vices feis fainc bench well cafn mainc bench wells cafn mainc bench work gwaith mainc bench works gwaith mainc bencher meinciwr benchers meinciwr benches mainc benchmark meincnod benchmarking meincnodi benchmarks meincnod bend plyg bend plygu bend backwards plygu'n ôl bend down plygu i lawr bend line llinell blygu bend lines llinell blygu bendability plygiannedd bending plygu (angular / radius) bending bar bar plygu bending bars bar plygu bending equipment offer plygu bending jig jig plygu bending jigs jig plygu bending moment moment plygu bending moments moment plygu bends plyg benediction bendith benedictions bendith benefice bywoliaeth beneficed mewn bywoliaeth benefices bywoliaeth benefit braint (legal) benefit budd (=advantage) benefit budd-dal (=insurance or social security payment) benefit of clergy braint clerigwyr benefits braint (legal) benefits budd (=advantage) benefits budd-dal (=insurance or social security payment) benevolence benthyciad gorfodol (=forced loan) benevolences benthyciad gorfodol (=forced loan) benevolent cyfeillgar benevolent despot unben goleuedig benevolent despotism unbennaeth oleuedig benevolent despotisms unbennaeth oleuedig benevolent despots unben goleuedig benevolent neutrality niwtraliaeth gyfeillgar bent backward hanging hongian ôl plyg bent bodkin botgin cam bent bodkins botgin cam bent bond bond cam bent bonds bond cam bent flat bodkin botgin fflat cam bent flat bodkins botgin fflat cam bent frame ffrâm blyg bent frames ffrâm blyg bent gouge gaing gau blyg bent gouges gaing gau blyg bent grass maeswellt (=agrostis) bent locking plate plât cloi plyg bent locking plates plât cloi plyg bent nose pliers gefelen drwyn cam bent wire gwifren blyg (decorative process) bent wires gwifren blyg (decorative process) bent-tail carrier cariwr cynffon plyg bent-tail carriers cariwr cynffon plyg benthic benthig benthos benthos bentwood chair cadair bren plyg bentwood chairs cadair bren plyg bentwood furniture dodrefn pren plyg benzene bensen benzenes bensen benzoic acid asid bensöig benzoic acids asid bensöig bequeath cymynroddi bequest cymynrodd bequests cymynrodd berceuse berceuse berceuses berceuse bereavement profedigaeth bereavements profedigaeth beret beret berets beret bergamask bergamasca bergamasks bergamasca bergwind bergwynt bergwinds bergwynt berkelium berceliwm (Bk) berkeliums berceliwm (Bk) berry aeronen berth docfa berth docio berths docfa beryllium beryliwm (Be) berylliums beryliwm (Be) best before ar ei orau cyn best face wyneb gorau best faces wyneb gorau best fit ffit orau best fits ffit orau best position safle gorau best positions safle gorau best time amser gorau best times amser gorau beta particle gronyn beta beta particles gronyn beta betaine betain betaines betain betrothal dyweddïad betrothals dyweddïad between centres rhwng canolau (on a lathe) between needle nodwydden between needles nodwydden bevel befel bevel befelu bevel chisel cŷn befel bevel chisels cŷn befel bevel gears gerau befel bevel panel panel befel bevel panels panel befel bevel wheels olwynion befel bevelled edge ymyl befel bevelled edges ymyl befel bevelled panel panel befel bevelled panels panel befel bevels befel beverage diod beverages diod bezel gwefl bezelled gweflog bezels gwefl bhakti bhakti bhaktis bhakti bias bias (in physics and of fabric) bias biasu (in physics and of fabric) bias gogwydd (=inclination) bias tuedd (in statistics) bias binding rhwymyn bias bias bindings rhwymyn bias bias extension estyniad bias bias extensions estyniad bias bias facing wynebyn bias bias facings wynebyn bias biased tueddol biased estimate amcangyfrif â thuedd (in statistics) biased estimates amcangyfrif â thuedd (in statistics) bib bib bibliography llyfryddiaeth bicarbonate of soda soda pobi bicellular deugellog biceps cyhyryn deuben bicimal deuol bicimal deuolyn bicimal point pwynt deuol bicimal points pwynt deuol bicimals deuolyn bick iron bonyn pig bick irons bonyn pig bicollateral bundle sypyn deugyfraidd bicollateral bundles sypyn deugyfraidd biconcave deugeugrwm biconcave lens lens deugeugrwm biconvex deuamgrwm bicultural deuddiwylliannol bicuspid valve falf ddwylen bicuspid valves falf ddwylen bid-rent curve cromlin rhent cynnig bid-rent curves cromlin rhent cynnig bidirectional bus bws deugyfeiriadol biennial eilflwydd biennial eilflwyddiad biennial flower blodyn eilflwydd biennial flowers blodyn eilflwydd biennials eilflwyddiad bifilar suspension croglin ddwbl bifilar suspensions croglin ddwbl bifocal deuffocal bifurcated deufforchiog bifurcated rivet rhybed deufforchog bifurcated rivets rhybed deufforchog bifurcation deufforchiad bifurcation ratio cymhareb ddeufforchio bifurcations deufforchiad big end bearing beryn y pen mawr big end bearings beryn y pen mawr bigger than mwy na bight geneufor bights geneufor bijective mapping mapio deusaethol bikini bicini bikinis bicini bilateral dwyochrol bilateral cleavage ymraniad cyfartal bilateral cleavages ymraniad cyfartal bilateral monopoly monopoli dwyffordd bilateral symmetry cymesuredd dwyochrol bilaterally symmetrical dwyochrol gymesur bilberries llus bile bustl bile acids asidau bustlog bile duct dwythell y bustl bile ducts dwythell y bustl bile pigment pigment y bustl bile pigments pigment y bustl bile salts halwynau'r bustl biles bustl bilge keel cilbren sadio bilge keels cilbren sadio bilinear deulinol bilingual dwyieithog bilingual person dwyieithog bilingual education addysg ddwyieithog bilingual educations addysg ddwyieithog bilingualism dwyieithrwydd bilingualisms dwyieithrwydd bilinguals person dwyieithog bilious bustlog bilirubin bilirwbin bilirubins bilirwbin biliverdin biliferdin biliverdins biliferdin bill bil (=statement of charges) bill mesur seneddol (before parliament) bill of exchange bil cyfnewid bill of indictment bil ditio bill of loading bil llwytho bill of quantities bil priodweddau bill of sale bil gwerthiant billet lletya milwyr billet moulding mowldin bilet billet mouldings mowldin bilet billhook bilwg billhooks bilwg billion biliwn billions biliwn bills bil (=statement of charges) bills mesur seneddol (before parliament) bimetallic deufetel bimetallic strip stribed deufetel bimetallic strips stribed deufetel bimodal deufodd bimolecular deufoleciwlaidd bin bin binary deuaidd binary arithmetic rhifyddeg ddeuaidd binary arithmetic operation gweithrediad rhifyddeg ddeuaidd binary arithmetic operations gweithrediad rhifyddeg ddeuaidd binary arithmetics rhifyddeg ddeuaidd binary bit did deuaidd binary bits did deuaidd binary cell cell ddeuaidd binary cells cell ddeuaidd binary code cod deuaidd binary coded character nod cod deuaidd binary coded characters nod cod deuaidd binary coded decimal degolyn cod deuaidd binary coded decimal notation nodiant degolion cod deuaidd binary coded decimal notations nodiant degolion cod deuaidd binary coded decimals degolyn cod deuaidd binary coded digit digid cod deuaidd binary coded digits digid cod deuaidd binary codes cod deuaidd binary counter rhifydd deuaidd binary counters rhifydd deuaidd binary digit digid deuaidd binary digits digid deuaidd binary dump dymp deuaidd binary dump dympio deuaidd binary dumps dymp deuaidd binary fission ymholltiad deuaidd binary fissions ymholltiad deuaidd binary form ffurf ddeuaidd binary forms ffurf ddeuaidd binary image delwedd ddeuaidd binary images delwedd ddeuaidd binary notation nodiant deuaidd binary notations nodiant deuaidd binary number rhif deuaidd binary numbers rhif deuaidd binary numeral rhifolyn deuaidd binary numerals rhifolyn deuaidd binary operation gweithrediad deuaidd binary operations gweithrediad deuaidd binary opposition cyferbynnu deuaidd binary point pwynt deuaidd binary points pwynt deuaidd binary search chwiliad deuaidd binary searches chwiliad deuaidd binary star seren ddwbl binary stars seren ddwbl binary time amser dwyran binary times amser dwyran binary to decimal conversion trawsnewidiad deuaidd i ddegol binary tree coeden ddeuaidd binary trees coeden ddeuaidd binary variable newidyn deuaidd binary variables newidyn deuaidd binaural deuglust bind clymu (with rope etc in physics) bind rhwymo (books etc with bandages etc) binder rhwymell (machine attachments) binder rhwymwr (of person) binders rhwymell (machine attachments) binders rhwymwr (of person) binding rhwymiad (of book) binding rhwymyn (=something that binds) binding energy egni clymu binding margin ymyl rhwymo binding margins ymyl rhwymo binding medium cyfrwng rhwymo binding mediums cyfrwng rhwymo binding precedent cynsail rwymol binding precedents cynsail rwymol binding wire gwifren rwymo binding wires gwifren rwymo bindings rhwymiad (of book) bindings rhwymyn (=something that binds) binocular deulygad binocular vision golwg deulygad binocular visions golwg deulygad binomial binomaidd binomial binomial binomial distribution dosraniad binomaidd binomial distributions dosraniad binomaidd binomial nomenclature dull enwi binomaidd binomial nomenclatures dull enwi binomaidd binomial theorem theorem binomial binomial theorems theorem binomial binomials binomial bioaccumulation biogynyddiad bioaccumulations biogynyddiad biochemical biocemegyn biochemicals biocemegyn biochemist biocemegydd biochemistry biocemeg biochemists biocemegydd biochore bïocor biochores bïocor bioclimatology biohinsoddeg biodegradable bioddiraddadwy biogenesis biogenesis biogeochemical bioddaeargemegol biogeography bioddaearyddiaeth biological biolegol biological control rheoli biolegol biological detergent glanedydd biolegol biological detergents glanedydd biolegol biological half life hanner oes biolegol biological half lifes hanner oes biolegol biological value gwerth biolegol biological values gwerth biolegol biology bioleg (of winter) bioluminescence bioymoleuedd bioluminescences bioymoleuedd biomass biomas biome bïom biomechanics biomecaneg biomes bïom biosensor biosynhwyrydd biosensors biosynhwyrydd biosome biosom biosomes biosom biosphere biosffer biospheres biosffer biosynthesize biosynthesu biotechnology biotechnoleg biotic biotig biotransformation biotrawsffurfiant biotransformations biotrawsffurfiant bipartite deurannol bipolar deubegwn birch bedwen birch plywood pren haenog bedw birch plywoods pren haenog bedw birches bedwen bird's eye llygad aderyn (maple) bird's eye view golygfa trem aderyn bird's eye views golygfa trem aderyn bird's foot delta delta crafanc bird's foot deltas delta crafanc birdsmouth ceg aderyn birdsmouths ceg aderyn birth genedigaeth birth and death statistics ystadegau geni a marw birth certificate tystysgrif geni birth certificates tystysgrif geni birth control rheoli cenhedlu birth defect nam geni birth defects nam geni birth rate cyfradd genedigaethau birth rates cyfradd genedigaethau birth weight pwysau geni birthmark man geni birthmarks man geni birthright genedigaeth-fraint birthrights genedigaeth-fraint births genedigaeth biscuit bisged biscuit firing tanio bisged biscuits bisged bisect dwyrannu (=divide in two) bisect haneru (=halve) bisector hanerydd bisectors hanerydd bisexual deurywiol bishop esgob bishop sleeve llawes esgob bishop sleeves llawes esgob bishop's commissary comisari'r esgob bishop's palace palas esgob bishop's palaces palas esgob bishopland tir esgob bishoplands tir esgob bishopric esgobaeth bishoprics esgobaeth bishops esgob bismuth bismwth (Bi) bismuths bismwth (Bi) bistable deusad bistables deusad bit crwcddarn (in music) bit did (in computing) bit ebill (of drill etc) bit haearn sodro (for soldering) bit density dwysedd didol bit location lleoliad did bit locations lleoliad did bit pattern patrwm didol bit patterns patrwm didol bit position safle didol bit positions safle didol bit rate cyfradd ddidol bit rates cyfradd ddidol bit string llinyn didau bit strings llinyn didau bite cnoad (describing texture) bite tamaid (=small piece) bites cnoad (describing texture) bites tamaid (=small piece) bitmap didfap bitmaps didfap bitonal deugywair bitonality deugyweiredd bits per second didau yr eiliad bitter chwerw bitter lake llyn chwerw bitter lakes llyn chwerw bitterness chwerwedd bitumen bitwmen bitumens bitwmen bituminous coal glo rhwym bituminous coals glo rhwym bituminous paint paent bitwmen bituminous paints paent bitwmen bitwise modd did bitwises modd did bivalent deufalent bivalve dwygragennog black du (enamelling colour) black bar bar du black bars bar du black beans ffa du black body radiator pelydrydd cyflawn black body radiators pelydrydd cyflawn black bonding bondin du black bondings bondin du black check banding bandin siec du black check bandings bandin siec du black economy economi du black frost rhew du black frosts rhew du black heat gwres du black heats gwres du black ice iâ du black ices iâ du black market marchnad ddu black markets marchnad ddu black mild steel dur meddal du (B.M.S.) black mild steels dur meddal du (B.M.S.) black pudding pwdin gwaed black puddings pwdin gwaed black rubric cyfeireb ddu black rubrics cyfeireb ddu black-eyed beans ffa llygatddu blackberries mwyar blackboard bwrdd du blackboards bwrdd du blackcurrants cyrens duon blackheart cast iron haearn bwrw hydrin blackheart cast irons haearn bwrw hydrin blacking duo (decorative process) blackjack blacjac (blende) blackjacks blacjac (blende) blackleg blacleg blacklegs blacleg blacks du (enamelling colour) blacks and whites duon a gwynion blackshirts crysau duon blacksmith gof blacksmith's forge gefail gof blacksmith's forges gefail gof blacksmith's hearth tân gof blacksmith's hearths tân gof blacksmiths gof bladder chwysigen (of plants) bladder pledren (of animals) bladders chwysigen (of plants) bladders pledren (of animals) blade llafn (of knife, bat) blade of grass gwelltyn blades llafn (of knife, bat) blanch blansio blank bwlch (=blank space) blank gwag blank cheque siec wag blank cheques siec wag blank disk disg gwag blank disks disg gwag blanket blanced blanket bath ymolch yn y gwely blanket bog gorgors blanket bogs gorgors blanket stitch pwyth blanced blanket stitches pwyth blanced blankets blanced blanks bwlch (=blank space) blasphemy cabledd blast chwyth blast chwythellu (=blow air on) blast chwythiad (=strong gust) blast ffrwydrad (=explosion) blast furnace ffwrnais chwyth blast furnaces ffwrnais chwyth blast hole chwythdwll blast holes chwythdwll blastocoel blastocoel blastocoels blastocoel blastocyte blastocyt blastocytes blastocyt blastoderm blastoderm blastoderms blastoderm blastomere blastomer blastomeres blastomer blastophore blastoffor blastophores blastoffor blasts chwythiad (=strong gust) blasts ffrwydrad (=explosion) blastula blastwla blastulas blastwla bleach cannu bleach cannydd bleach solution hydoddiant cannu bleach solutions hydoddiant cannu bleached can bleached area rhan wedi'i channu bleached areas rhan wedi'i channu bleached calico calico can bleached cane gwialen gan bleached canes gwialen gan bleached white calico calico gwyn can bleaches cannydd bleaching agent cannydd bleaching agents cannydd bleaching powder powdr cannu bleaching powders powdr cannu bleeding gwaedu bleeding of dye llifyn yn rhedeg bleep test prawf blip bleep tests prawf blip bleeper blipiwr bleepers blipiwr blend asio (voices) blend cymhlitho (in biology) blend cymysgedd (in cooking) blend cymysgu (in cooking) blende blend (zinc) blended fabric ffabrig cymysg blended fabrics ffabrig cymysg blended fibre ffibr cymysg blended fibres ffibr cymysg blended inheritance etifeddiaeth gymhlith blended inheritances etifeddiaeth gymhlith blended material defnydd cymysg blended materials defnydd cymysg blended-hair brush brwsh blew cymysg blended-hair brushs brwsh blew cymysg blender cymysgydd blenders cymysgydd blendes blend (zinc) blends cymysgedd (in cooking) blessed sacrament cymun bendigaid blessed sacraments cymun bendigaid blessing bendith blessings bendith blight malltod (of planning) blights malltod (of planning) blind cysgodlen (on window) blind dall (=unable to see) blind alley llwybr diffrwyth (figurative sense) blind child plentyn dall blind childs plentyn dall blind hem hem gudd blind hems hem gudd blind hole twll dall blind holes twll dall blind mortise mortais dall blind mortises mortais dall blind nailing hoelio dall blind pupil disgybl dall blind pupils disgybl dall blind side ochr dywyll blind side wing forward blaenasgell dywyll blind side wing forwards blaenasgell dywyll blind sides ochr dywyll blind spot dallbwynt blind spots dallbwynt blind-ending pengaead blindness dallineb blinds cysgodlen (on window) blister pothell blister copper copr pothell blister coppers copr pothell blister steel dur pothell blister steels dur pothell blistering pothellu blisters pothell blizzard storm eira blizzards storm eira bloating ymchwyddo blob smotyn blobs smotyn block bloc block blocio (=to use a block) block rhwystro (=obstruct) block capital letter priflythyren block capital letters priflythyren block chart siart bloc block charts siart bloc block clamp clamp bloc block clamps clamp bloc block colour lliw bloc block colours lliw bloc block cutter blocdorrwr block cutters blocdorrwr block cutting tool erfyn ysgythru block cutting tools erfyn ysgythru block design test prawf trefnu patrymau block design tests prawf trefnu patrymau block diagram diagram bloc block diagrams diagram bloc block field cludair (felsenmeer) block fields cludair (felsenmeer) block form ffurf bloc block forms ffurf bloc block graph graff bloc block graphs graff bloc block lava bloc lafa block lavas bloc lafa block length hyd bloc block lengths hyd bloc block lettering prif lythrennu block letters prif lythrennau block mountain blocfynydd block mountains blocfynydd block move symudiad bloc block moves symudiad bloc block paragraph paragraff ochr block paragraphs paragraff ochr block pattern patrwm bloc block patterns patrwm bloc block placement lleoliad mewn bloc block placements lleoliad mewn bloc block plane plaen bach block planes plaen bach block printing printio bloc block scree sgri bloc block screes sgri bloc block structure strwythur bloc block structured language iaith strwythur bloc block structured languages iaith strwythur bloc block structures strwythur bloc block tackle tacl floc block tackles tacl floc block wall wal flociau block walls wal flociau block work gwaith blociau block works gwaith blociau blockade gwarchae blockades gwarchae blockboard blocfwrdd blockboards blocfwrdd blocked account cyfrif gwaharddedig blocked accounts cyfrif gwaharddedig blocking anticyclone antiseiclon rhwystrol blocking anticyclones antiseiclon rhwystrol blocking factor ffactor flocio blocking factors ffactor flocio blocking hammer morthwyl blocio blocking hammers morthwyl blocio blocks bloc blocks and clamps blociau a chlampiau blockwork gwaith bloc / blociau blockworks gwaith bloc / blociau blood gwaed blood and iron gwaed a haearn blood bank banc gwaed blood banks banc gwaed blood circulation cylchrediad y gwaed blood circulations cylchrediad y gwaed blood clot tolchen blood clots tolchen blood clotting ceulo'r gwaed blood corpuscle corffilyn y gwaed blood corpuscles corffilyn y gwaed blood count cyfrif gwaed blood counts cyfrif gwaed blood donor rhoddwr gwaed blood donors rhoddwr gwaed blood feud cynnen waed (in general) blood feud galanas (in old Welsh law) blood feuds cynnen waed (in general) blood feuds galanas (in old Welsh law) blood glucose glwcos gwaed blood glucose level lefel glwcos yn y gwaed blood glucose levels lefel glwcos yn y gwaed blood glucoses glwcos gwaed blood group grŵp gwaed blood groups grŵp gwaed blood pressure pwysedd gwaed blood pressures pwysedd gwaed blood relationship perthynas drwy waed blood relationships perthynas drwy waed blood space gwagle gwaed blood spaces gwagle gwaed blood stream llif y gwaed blood streams llif y gwaed blood sugar siwgr gwaed blood sugars siwgr gwaed blood test prawf gwaed blood tests prawf gwaed blood transfusion trallwysiad gwaed blood transfusions trallwysiad gwaed blood-brain barrier gwahanfur gwaed-ymennydd blood-brain barriers gwahanfur gwaed-ymennydd blood-vessel pibell waed blood-vessels pibell waed bloodless revolution chwyldro di-drais bloodless revolutions chwyldro di-drais bloods gwaed bloody question cwestiwn marwol bloody questions cwestiwn marwol bloom blwm (industrial) blooms blwm (industrial) blotting paper papur sugno blotting papers papur sugno blouse blows blouses blows blouson blowson blousons blowson blow chwythu blow ergyd blow an EPROM chwythu EPROM blow holes chwythdyllau (casting) blow moulding chwythfowldio blow-hole mordwll blow-holes mordwll blower chwythwr blowers chwythwr blowlamp chwythlamp blowlamps chwythlamp blown sand tywod chwyth blown sands tywod chwyth blowpipe chwythbib blowpipes chwythbib blows ergyd blue bliw (for brightening clothes) blue glas (colour) blue baby baban glas blue flag award gwobr y faner las blue flag awards gwobr y faner las blue litmus solution hydoddiant litmws glas blue litmus solutions hydoddiant litmws glas blue precipitate gwaddod glas blue precipitates gwaddod glas blue red coch glas (crimson) blue reds coch glas (crimson) blue-collar worker gweithiwr coler las blue-collar workers gweithiwr coler las blueprint glasbrint blueprints glasbrint blues bliw (for brightening clothes) blues blues (=song) blues glas (colour) blues and violets gleision a fioledau blues singing canu'r felan bluff blwff bluffs blwff bluing glasu (decorative process) blunger peiriant cymysgu clai blungers peiriant cymysgu clai blunging cymysgu clai blunt pylu blunt pŵl bluntness pylni blur brycheuyn blur pylu blurs brycheuyn board astell (=plank) board bwrdd (in general) board and easel bwrdd ac îsl board based bwrdd seiliedig board loom gwŷdd bwrdd board looms gwŷdd bwrdd boarded astellog boarding school ysgol breswyl boarding schools ysgol breswyl boards astell (=plank) boards bwrdd (in general) boat neck gwddf bad boat necks gwddf bad bob line llinyn plwm bob lines llinyn plwm bobbin bobin bobbin case cas bobin bobbin cases cas bobin bobbin lace les bobin bobbin laces les bobin bobbin winder gwas dirwyn bobbin winders gwas dirwyn bobbins bobin bodice bodis bodice block bloc bodis bodice blocks bloc bodis bodice facing wynebyn bodis bodice facings wynebyn bodis bodices bodis bodily activity gweithgarwch corfforol bodkin botgin bodkins botgin body corff (in general) body gwrthrych (object) body awareness ymwybyddiaeth gorfforol body building foods bwydydd cryfhau'r corff body cavity ceudod y corff body cell corffgell body cells corffgell body clearance cliriad y dril (drill) body clearances cliriad y dril (drill) body colour lliw di-draidd body colours lliw di-draidd body control rheolaeth gorfforol body controls rheolaeth gorfforol body fluids hylifau'r corff body image delwedd y corff body images delwedd y corff body language iaith y corff body languages iaith y corff body management rheolaeth dros y corff body managements rheolaeth dros y corff body mass index indecs màs y corff body mass indexes indecs màs y corff body percussion taro'r corff body politic cenedl wleidyddol body politics cenedl wleidyddol body rhythm rhythm corff body rhythms rhythm corff body stain staen di-draidd body stains staen di-draidd body temperature tymheredd y corff body temperatures tymheredd y corff body tension tyndra'r corff body tensions tyndra'r corff body type math o gorff body types math o gorff body weight pwysau'r corff body-centred cubic ciwbig corff-ganolog body-centred cubic lattice dellten giwbig gorff-ganolog body-centred cubic lattices dellten giwbig gorff-ganolog body-centred cubics ciwbig corff-ganolog bodying-in llenwi'r mân dyllau bodyless digorff bodyless puppet pyped digorff bodyless puppets pyped digorff bog cors bog moss migwyn boil berwi boil cornwyd boiled egg wy wedi'i ferwi boiled eggs wy wedi'i ferwi boiled linseed oil olew had llin wedi'i ferwi boiled linseed oils olew had llin wedi'i ferwi boiled oil olew wedi'i ferwi boiled oils olew wedi'i ferwi boiled water dŵr wedi'i ferwi boiled waters dŵr wedi'i ferwi boiler boeler boilers boeler boiling berw boiling fowl iâr i'w berwi boiling fowls iâr i'w berwi boiling point berwbwynt boiling points berwbwynt boiling tube tiwb berwi boiling tubes tiwb berwi boiling water dŵr berw boiling waters dŵr berw boils cornwyd bold trwm (of type) bole boncyff (of tree) bolero bolero boles boncyff (of tree) bolson bolson bolsons bolson bolster bolster bolsters bolster bolt bollt bolt bolltio bolt catch clicied follt bolt catches clicied follt bolt cutter torrwr bollt bolt cutters torrwr bollt bolt tongs gefel follt bolted bolltiog bolted joint uniad bolltiog bolted joints uniad bolltiog bolts bollt bolus bolws bolus ground grwnd bolws bolus grounds grwnd bolws bomb calorimeter calorimedr bom bomb calorimeters calorimedr bom bombard peledu bombarding peledol bombardon bombardon bombardons bombardon bombed site safle wedi'i fomio bombed sites safle wedi'i fomio bond bond (financial and physics) bond bondio bond cwlwm agosrwydd (of relationship) bond dissociation energy egni daduno bond bond energy term term egni bond bond energy terms term egni bond bond failure gwrthod gafael bond polarity polaredd bond bond service taeogwasanaeth bond services taeogwasanaeth bond strength cryfder bond bond strengths cryfder bond bondage taeogaeth bondages taeogaeth bonded bondiog (finish) bonded fabric ffabrig bondiog bonded fabrics ffabrig bondiog bonded floor llawr wedi'i fondio bonded floors llawr wedi'i fondio bonded surface arwyneb bondiog bonded surfaces arwyneb bondiog bonded warehouse warws ecseis bonded warehouses warws ecseis bonding bondin (building material) bonding sefydlu cwlwm agosrwydd (of relationship) bonding adhesive adlyn bondio bonding adhesives adlyn bondio bonding agent cyfrwng bondio bonding agents cyfrwng bondio bondings bondin (building material) bonds bond (financial and physics) bonds cwlwm agosrwydd (of relationship) bondsman taeog bondsmans taeog bone asgwrn bone and hide glue glud asgwrn a chroen bone and hide glues glud asgwrn a chroen bone awl mynawyd asgwrn bone awls mynawyd asgwrn bone china tsieni asgwrn bone chinas tsieni asgwrn bone conduction dargludo drwy'r asgwrn bone folder plygell asgwrn bone folders plygell asgwrn bone marrow mêr bone marrows mêr bone scraper crafwr asgwrn bone scrapers crafwr asgwrn bones asgwrn bongo bongo boning tynnu esgyrn (in cooking) boning rod rhoden asgwrn boning rods rhoden asgwrn bonnet boned bonnets boned bonus bonws bonus payment tâl bonws bonus payments tâl bonws bony fish pysgodyn esgyrnog bony fishs pysgodyn esgyrnog boogie-woogie bwgi-wgi boogie-woogies bwgi-wgi book archebu (=make a reservation) book llyfr book binder rhwymwr llyfrau book binders rhwymwr llyfrau book binding rhwymo llyfrau book craft crefft llyfrau book crafts crefft llyfrau book jacket siaced lwch book jackets siaced lwch book leather lledr llyfr book leathers lledr llyfr book trough cafn llyfrau book troughs cafn llyfrau book-end bwtres llyfrau book-ends bwtres llyfrau book-plate plât llyfr book-plates plât llyfr bookbinder's bench mainc rhwymo llyfrau bookbinder's benches mainc rhwymo llyfrau bookbinder's press gwasg rhwymwr llyfrau bookbinding cloth lliain rhwymo llyfrau bookbinding cloths lliain rhwymo llyfrau bookcase cwpwrdd llyfrau bookcases cwpwrdd llyfrau bookcloth lliain llyfrau bookcloths lliain llyfrau booking bwciad booking checklist rhestr wirio bwcio booking checklists rhestr wirio bwcio booking form ffurflen bwcio booking forms ffurflen bwcio bookings bwciad booklet llyfryn booklets llyfryn bookmark nod tudalen bookmarks nod tudalen bookrack rhesel lyfrau bookracks rhesel lyfrau books llyfr bookshelf silff lyfrau bookshelfs silff lyfrau boom bŵm (on boat) boom ffyniant (in industry, economy) boom trawst (at harbour mouth) boombams bwmbamau booming ffyniannus booms bŵm (on boat) booms ffyniant (in industry, economy) booms trawst (at harbour mouth) booster atgyfnerthol booster cyfnerthydd (for electrical power) booster dose dos atgyfnerthol booster doses dos atgyfnerthol booster injection pigiad atgyfnerthol booster injections pigiad atgyfnerthol boosters cyfnerthydd (for electrical power) boot cicio (=kick) boot esgid (for rugby, soccer etc) booth bwth booths bwth boots esgid (for rugby, soccer etc) bootstrap loader ymlwythwr bootstrap loaders ymlwythwr bootstrapping ymlwytho boracic glaze gwydredd borasig boracic glazes gwydredd borasig borax boracs borax cone côn boracs borax cones côn boracs borax palette palet boracs borax palettes palet boracs boraxes boracs border border (on paper, materials) border goror (of area, country) border design dyluniad border border designs dyluniad border bordered pits mân-bantiau gweflog borderer bordar (=tenant) borderers bordar (=tenant) borderline ffin borderline ffiniol borderline candidate ymgeisydd ffiniol borderline candidates ymgeisydd ffiniol borderline case achos ffiniol borderline cases achos ffiniol borderline reviewing adolygu'r achosion ffiniol borderlines ffin borders border (on paper, materials) borders goror (of area, country) bore eger (of tidal wave) bore tyllfedd (=diameter) bore tyllu (=make a hole) bore box blwch tyllu bore boxes blwch tyllu bore-hole twll turio bore-holes twll turio bored diflas (=fed up) boredom diflastod boredoms diflastod borer tyllwr borers tyllwr bores eger (of tidal wave) bores tyllfedd (=diameter) boring diflas (=uninteresting) boring bar bar tyllu boring bars bar tyllu boring tool erfyn tyllu boring tools erfyn tyllu boron boron (B) boron trifluoride boron trifflworid boron trifluorides boron trifflworid borons boron (B) borough bwrdeistref borough corporation corfforaeth y fwrdeistref borough corporations corfforaeth y fwrdeistref borough franchise etholfraint fwrdeistrefol borough franchises etholfraint fwrdeistrefol borough history hanes bwrdeistrefol boroughs bwrdeistref borrow benthyca borrowed light golau benthyg borrowed lights golau benthyg borrower benthyciwr borrowers benthyciwr boss bogail (of shield) boss cnap (=protuberance) boss dwrn addurnedig bossing mallet gordd ben wy bossing mallets gordd ben wy bote budd botes budd bottle potel bottle feeding bwydo o'r botel bottle warmer gwresogydd potel bottle warmers gwresogydd potel bottleneck tagfa bottlenecks tagfa bottles potel bottom gwaelod bottom drawer rail rheilen waelod drôr bottom drawer rails rheilen waelod drôr bottom edge ymyl waelod bottom edges ymyl waelod bottom frame ffrâm waelod bottom frames ffrâm waelod bottom fuller pannydd isaf bottom fullers pannydd isaf bottom gear gêr isaf bottom gears gêr isaf bottom part darn gwaelod bottom parts darn gwaelod bottom rail rheilen isaf bottom rails rheilen isaf bottom rake gwyredd gwaelod bottom rakes gwyredd gwaelod bottom set bed gwely is-haen bottom set beds gwely is-haen bottom swage darfath isaf bottom swages darfath isaf bottom-up programming rhaglennu adeiladol bottoming stake bonyn gwaelodi bottoming stakes bonyn gwaelodi bottoming tap tap gwaelodi bottoming taps tap gwaelodi bottoms gwaelod botulism botwliaeth botulisms botwliaeth bouclé bouclé bouclé yarn edafedd bouclé bouclés bouclé bough cangen boughs cangen boulder clogfaen boulder choke tagfa glogfeini boulder chokes tagfa glogfeini boulder clay clog-glai boulders clogfaen bounce sbonc bounce sboncio bounce back adlam bounce back adlamu bounce backs adlam bounce of the ball sbonc y bêl bounce on the ground sboncio ar y ddaear bounce pass pàs sboncio bounces sbonc bound arffin (=limitation) bound llam (=jump) bound llamu (=jump) bound rhwym (of electron) bound buttonhole twll botwm wedi'i rwymo bound buttonholes twll botwm wedi'i rwymo bound by contract rhwym dan gontract bound opening agoriad rhwymog bound openings agoriad rhwymog bound slot pocket poced agen bound slot pockets poced agen boundary ffin boundary terfyn (fence) boundary conditions amodau ffin boundary layer haen ffin boundary layers haen ffin bounded ffinedig bounded variation amrywiad ffinedig bounded variations amrywiad ffinedig bounding plane plân terfyn bounding planes plân terfyn bounds arffin (=limitation) bounds llam (=jump) bouquet garni bouquet garni bouquet garnis bouquet garni bourgeois bourgeois bourgeoisie bourgeoisie bourgeoisies bourgeoisie bourn nant hafesb bourns nant hafesb bourrée bourrée bourrées bourrée bout bowt bouts bowt bovate bufedd bovates bufedd bow bwa (for archery) bow crymu (=bend) bow dolen (in needlework) bow tynnu bwa (with stringed instrument) bow ymgrymiad (=inclination of the head or trunk) bow ymgrymu (=incline the head or trunk) bow case cas bwa bow cases cas bwa bow down bwa i lawr bow knot cwlwm dolen bow knot pattern patrwm cwlwm dolen bow knot patterns patrwm cwlwm dolen bow knots cwlwm dolen bow side ochr dde (in rowing) bow sides ochr dde (in rowing) bow tie tei bô bow ties tei bô bow up bwa i fyny bow window ffenestr fwa bow windows ffenestr fwa bow-fronted blaengrwm bow-saw llif fwa bow-saws llif fwa bow-stringed truss cwpl bwaog bowed harp telyn fwa bowed harps telyn fwa bowel perfedd bowels perfedd bowing bwa-nodi (in a score) bowl bowliad (=action of bowling) bowl bowlio bowl powlen bowl out bowlio allan bowl over the wicket bowlio dros y wiced bowl overarm bowlio dros ysgwydd bowl round the wicket bowlio rownd y wiced bowl underarm bowlio dan ysgwydd bowled ball pelen bowled balls pelen bowler bowliwr bowlers bowliwr bowlful powlaid bowlfuls powlaid bowline bowlin bowlines bowlin bowling crease cris bowlio bowling creases cris bowlio bowling method dull o fowlio bowling methods dull o fowlio bowling speed cyflymder y bowlio bowling speeds cyflymder y bowlio bowls bowliad (=action of bowling) bowls powlen bowstring llinyn bwa bowstrings llinyn bwa box blwch (in general) box bocs (gymnastic apparatus) box bocsio box angle plate plât ongl blwch box angle plates plât ongl blwch box construction adeiladwaith blwch box constructions adeiladwaith blwch box crosswise bocs ar groes box crosswises bocs ar groes box frame ffrâm bocs box frames ffrâm bocs box joint uniad blwch box joints uniad blwch box lengthwise bocs ar hyd box lengthwises bocs ar hyd box lock clo blwch box locks clo blwch box pleat plet bocs box pleat opening agoriad plet bocs box pleat openings agoriad plet bocs box pleats plet bocs box spanner sbaner blwch box spanners sbaner blwch box square sgwâr blwch box squares sgwâr blwch box tongs gefel flwch box wood pren bocs box woods pren bocs box-trap magl-flwch box-traps magl-flwch boxwood mallet gordd pren bocs boxwood mallets gordd pren bocs boxwood ruler riwl pren bocs boxwood rulers riwl pren bocs boy bachgen boycott boicotio brace carntro (=device for clamping) brace cledd (=cleat) brace cleddu (=cleat) brace cyplysydd (=mark in printing, music) brace ffrâm ddannedd (for teeth) brace tynhau (the bow) brace and bit carntro ac ebill braced cleddog braced door drws cleddog braced doors drws cleddog braced truss cwpl cleddog bracer breichydd bracers breichydd braces carntro (=device for clamping) braces cledd (=cleat) braces cyplysydd (=mark in printing, music) braces ffrâm ddannedd (for teeth) brachial breichiol bracket braced (for shelving) bracket cromfach (=printing mark) bracket foot troed fraced bracket foots troed fraced bracketing bracedu brackets braced (for shelving) brackets cromfach (=printing mark) brackish water dŵr lled hallt brackish waters dŵr lled hallt bract bract bract scales cen bract bracteole bractolyn bracteoles bractolyn bracts bract brad hoelen fain (cut nail) bradawl mynawyd bradawls mynawyd brads hoelen fain (cut nail) bradycardia bradycardia bradycardias bradycardia braid brêd braid loom gwŷdd brêd braid looms gwŷdd brêd braided river afon blethog braided rivers afon blethog braiding plethu braids brêd brain ymennydd brain damage niwed i'r ymennydd brain damages niwed i'r ymennydd brain dead ymennydd yn farw brain death marwolaeth yr ymennydd brain deaths marwolaeth yr ymennydd brain scanning sganio'r ymennydd brain storming ystyried syniadau brains ymennydd braise brwysio brake brêc brake block bloc brêc brake blocks bloc brêc brake cylinder silindr brêc brake cylinders silindr brêc brake drum drwm brêc brake drums drwm brêc brake fluid hylif brêc brake fluids hylif brêc brake handle dolen frêc brake handles dolen frêc brake horse power marchnerth brêc brake horse powers marchnerth brêc brake lever lifer brêc brake levers lifer brêc brake resistance gwrthedd brêc brake resistances gwrthedd brêc brake shoe esgid brêc brake shoes esgid brêc brake wheel olwyn frêc brake wheels olwyn frêc brakes brêc braking distance pellter brecio braking distances pellter brecio bran bran branch cangen branch ffatri gangen (factory) branch ymganghennu branch circumference cylchedd cangen branch circumferences cylchedd cangen branch development datblygiad cangen branch developments datblygiad cangen branch line lein gangen branch lines lein gangen branch pipe pibell gangen branch pipe junction cydiad pibell gangen branch pipe junctions cydiad pibell gangen branch pipes pibell gangen branch prism prism cangen branch prisms prism cangen branch shop siop gangen branch shops siop gangen branched canghennog branched terminals of the axon terfyniadau canghennog yr acson branches cangen branches ffatri gangen (factory) branchia tagell (=gill) branchial tagellog branchias tagell (=gill) branching database cronfa ddata ganghennog branching databases cronfa ddata ganghennog branching programme rhaglen ganghennog branching programmes rhaglen ganghennog brand brand (=make of goods) brand gwarthnodi (=mark with disgrace) brand image delwedd brand brand images delwedd brand brand name enw brand brand names enw brand branded goods nwyddau brand brandering brandro brands brand (=make of goods) brandy brandi brandy butter menyn brandi brandy butters menyn brandi brandy snap crimpen frandi brandy snaps crimpen frandi brans bran brash malurion brass pres brass backed cefn pres brass backeds cefn pres brass bush bwsh pres brass bushs bwsh pres brass drawing pin pìn bawd pres brass drawing pins pìn bawd pres brass eyelet llygaden bres brass eyelets llygaden bres brass filings efyddlifion brass handle dolen bres brass handles dolen bres brass head nail hoelen ben pres brass head nails hoelen ben pres brass instrument offeryn pres brass instruments offeryn pres brass nail hoelen bres brass nails hoelen bres brass rubbing rhwbiad pres brass rubbings rhwbiad pres brass screw sgriw bres brass screws sgriw bres brass section adran bres brass sections adran bres brass solo unawd pres brass wire gwifren bres brass wires gwifren bres brassback saw llif gefn bres brassback saws llif gefn bres brassica crop cnwd bresych brassica crops cnwd bresych bravura brafwra bravuras brafwra brawn cosyn pen brawns cosyn pen brayer rholer (roller) brayers rholer (roller) braze presyddu brazed joint uniad wedi'i bresyddu brazed joints uniad wedi'i bresyddu brazing clamp clamp presyddu brazing clamps clamp presyddu brazing hearth aelwyd bresyddu brazing hearths aelwyd bresyddu brazing process proses bresyddu brazing spelter sbelter presyddu brazing spelters sbelter presyddu brazing torch tortsh bresyddu brazing torches tortsh bresyddu brazing wire gwifren bresyddu brazing wires gwifren bresyddu breach bwlch (=gap) breach bylchu (=break through) breach llamu (of whales etc) breach of contract tor-contract breach of duty tor-dyletswydd breach of peace tor-heddwch breached bylchog breaches bwlch (=gap) bread bara bread and butter bara menyn bread and butter pudding pwdin bara menyn bread and butter puddings pwdin bara menyn bread and butters bara menyn bread crumbs briwsion bara bread roll rholyn bara bread rolls rholyn bara breadboard bwrdd bara breadboards bwrdd bara breads bara breadth lled breadths lled break toriad break torri break crop cnwd saib break crops cnwd saib break even adennill costau break even chart siart adennill costau break even charts siart adennill costau break frequency amledd torri break ground torri tir break joint uniad toriad break joints uniad toriad break line llinell doriad break lines llinell doriad break loan torfenthyciad break loans torfenthyciad break the wicket torri'r wiced break with Rome torri oddi wrth Rufain breakage toriad breakages toriad breakdown methiant (=failure) breakdown torri i lawr (of machinery) breakdown ymddatodiad (=disintegration) breakdowns methiant (=failure) breakdowns ymddatodiad (=disintegration) breaker moryn (of wave) breakers moryn (of wave) breakfast brecwast breakfast cereal grawnfwyd brecwast breakfast cereals grawnfwyd brecwast breakfasts brecwast breaking news newyddion sy’n torri breaking of voice llais yn torri breakpoint torbwynt breakpoints torbwynt breaks toriad breakwater morglawdd breakwaters morglawdd bream gwrachen ddu breams gwrachen ddu breast brest (in general) breast bron (of woman) breast drill dril brest breast drills dril brest breast feeding bwydo o'r fron breast self-examination hunan archwiliad o’r fron breast self-examinations hunan archwiliad o’r fron breast shot wheel rhod ffrwd ganol breast shot wheels rhod ffrwd ganol breasts brest (in general) breasts bron (of woman) breaststroke nofio broga breath anadl breath mark marc anadlu breath marks marc anadlu breathe anadlu breathed sound sain anadl breathed sounds sain anadl breathing exercise ymarfer anadlu breathing exercises ymarfer anadlu breathing movement symudiad anadlu breathing movements symudiad anadlu breathing rate cyfradd anadlu breathing rates cyfradd anadlu breathless byr ei anadl (with masculine nouns) breathless byr ei hanadl (with feminine nouns) breaths anadl breech birth esgoriad ffolennol breech births esgoriad ffolennol breeches clos pen-glin breed brid breed bridio breeder reactor adweithydd bridiol breeder reactors adweithydd bridiol breeding cycle cylchred fridio breeding cycles cylchred fridio breeds brid breeze awel (=light wind) breeze chwa (blues) breeze block bloc bris breeze blocks bloc bris breeze slab slab bris breeze slabs slab bris breezes awel (=light wind) breezes chwa (blues) breve brif breves brif brevet dogfen braint filwrol brevets dogfen braint filwrol breviary llyfr gwasanaeth brew bragu (alcohol) brew bwrw ffrwyth (of tea) bribe llwgrwobr bribe llwgrwobrwyo bribery and corruption llwgrwobrwyo a llygru bribes llwgrwobr brick bricsen brick clay bric-glai brick cutting torri briciau brick dust llwch brics brick dusts llwch brics brick earth bric-bridd brick earths bric-bridd bricks bricsen brickwork bricwaith brickworks bricwaith bricolage bricolage bricolages bricolage bride-price cowyll bride-prices cowyll bridge pont bridge pontio bridge circuit cylched bont bridge circuits cylched bont bridge passage pont bridge passages pont bridge point man pontio bridge points man pontio bridge tone traws-dôn bridge tones traws-dôn bridgehead blaenlaniad (military) bridgehead talbont (in architecture) bridgeheads blaenlaniad (military) bridgeheads talbont (in architecture) bridges pont bridging course cwrs pontio bridging courses cwrs pontio bridging joist trawst pontio (flooring) bridging joists trawst pontio (flooring) bridging loan benthyciad dros dro bridging loans benthyciad dros dro bridle ffrwyn bridle ffrwyno bridle bit genfa ffrwyn bridle bits genfa ffrwyn bridle joint uniad bagl bridle joints uniad bagl bridles ffrwyn brief briff brief byr (in general) brief rhagbaratoi brief outline amlinelliad byr brief outlines amlinelliad byr briefs briff brigade brigâd brigades brigâd brigand gwylliad brigands gwylliad bright llachar bright colour lliw llachar bright colours lliw llachar bright dip dip gloywi bright dips dip gloywi bright drawn bars barrau gloyw bright drawn mild steel dur meddal gloyw wedi'i dynnu (B.D.M.S.) bright drawn mild steels dur meddal gloyw wedi'i dynnu (B.D.M.S.) bright mild steel dur meddal gloyw (B.M.S.) bright mild steels dur meddal gloyw (B.M.S.) bright orange oren llachar (enamelling colour) bright oranges oren llachar (enamelling colour) bright red heat gwres cochias (cherry red) bright red heats gwres cochias (cherry red) bright yellow heat gwres eirias bright yellow heats gwres eirias brightness disgleirdeb brightness control rheolydd disgleirdeb brightness controls rheolydd disgleirdeb brill bril brilliance disgleirdeb brilliance of colour disgleirdeb lliw brilliances disgleirdeb brilliant llachar brilliant blue glas llachar brilliant blues glas llachar brilliant colour lliw llachar brilliant colours lliw llachar brilliant green gwyrdd llachar brilliant greens gwyrdd llachar brills bril brine heli brine test prawf heli brine tests prawf heli brines heli bring-and-buy moes a phryn brinkmanship hwylio yn agos i'r gwynt brioche brioche brioches brioche brisket brisged briskets brisged brisling corbennog brislings corbennog bristle blewyn (of brush) bristle gwrychyn (of animal) bristle brush brwsh blew bristle brushs brwsh blew bristles blewyn (of brush) bristles gwrychyn (of animal) brittle brau brittleness breuder broach cŷn main (=bit for boring) broaches cŷn main (=bit for boring) broad llydan broad beans ffa broad pen pen llydan broad pen lettering llythrennu pen llydan broad pens pen llydan broad trend tuedd gyffredinol broad trends tuedd gyffredinol broadcast darllediad broadcast darlledu broadcasts darllediad broaden lledu broadleaved llydanddail broadleaved tree coeden lydanddail broadleaved trees coeden lydanddail broadsheet papur safonol broadsheets papur safonol brocade brocêd brocades brocêd broccoli brocoli broderie anglaise broderie anglaise broderie anglaises broderie anglaise broiler cyw brwylio broilers cyw brwylio broken cadence diweddeb annisgwyl broken cadences diweddeb annisgwyl broken chord cord gwasgar broken chords cord gwasgar broken colour rhaniadliw broken colours rhaniadliw broken consort consort cymysg broken consorts consort cymysg broken line llinell doredig broken lines llinell doredig broker brocer brokerage broceriaeth brokerages broceriaeth brokers brocer brominate bromineiddio bromination bromineiddiad brominations bromineiddiad bromine bromin (Br) bromine water dŵr bromin bromine waters dŵr bromin bromines bromin (Br) bromoethane bromoethan bromoethanes bromoethan bronchiole bronciolyn bronchioles bronciolyn bronchitis broncitis bronchus broncws bronze efydd bronze alloy aloi efydd bronze green gwyrdd efydd (enamelling colour) bronze greens gwyrdd efydd (enamelling colour) bronze hoard celc efydd bronze hoards celc efydd bronzes efydd brooch tlws brooch back cefn tlws brooch backs cefn tlws brooch pin tlysbin brooch pins tlysbin brooches tlws broom ysgubell brooms ysgubell broomstick coes ysgubell broomsticks coes ysgubell broth potes brotherhood brawdoliaeth brotherhoods brawdoliaeth broths potes brow ael brown brown brown brownio brown bread bara brown brown breads bara brown brown coal glo brown brown coals glo brown brown earth pridd brown brown earth soil pridd brown brown earth soils pridd brown brown earths pridd brown brown paper papur llwyd brown paper tape tâp papur llwyd brown paper tapes tâp papur llwyd brown papers papur llwyd brown sugar siwgr coch (demerara) brown sugars siwgr coch (demerara) brownish brownaidd browns brown brownshirts crysau brown brows ael browse pori bruise clais bruise cleisio bruises clais brush brwsh brush brwsio brush care gofal brwsh brush cares gofal brwsh brush handle coes brwsh brush handles coes brwsh brush polish llathrydd brwsh brush polishs llathrydd brwsh brush stand stand brwshys brush stands stand brwshys brush stroke strôc brwsh brush strokes strôc brwsh brushed gwlanog (finish) brushed cotton cotwm gwlanog brushed cottons cotwm gwlanog brushed nylon neilon gwlanog brushed nylons neilon gwlanog brushs brwsh brushwood prysgwydd brushwork brwshwaith brushworks brwshwaith bryophyte bryoffyt bryophytes bryoffyt bubble byrlymu bubble gyrru swigod drwy bubble swigen bubbles swigen buccal cavity ceudod bochaidd buccaneer bycanîr buccaneers bycanîr buck ebol (in gymnastics) buck crosswise ebol ar groes buck crosswises ebol ar groes bucket bwced buckets bwced buckle bwcl buckle bwclo buckle crychu buckler bwcler bucklers bwcler buckles bwcl buckram bwcram buckrams bwcram bucks ebol (in gymnastics) buckwheat gwenith yr hydd buckwheats gwenith yr hydd bud blaguro bud blaguryn bud scale cen blaguro bud scales cen blaguro budding ymflagurol budgerigar green gwyrdd bwdgerigar (enamelling colour) budgerigar greens gwyrdd bwdgerigar (enamelling colour) budget cyllideb budget cyllidebu budget account cyfrif cyllido budget accounts cyfrif cyllido budget deficit diffyg cyllidol budget deficits diffyg cyllidol budget share cyfran o'r gyllideb budget shares cyfran o'r gyllideb budgetary cyllidol budgetary arrangement trefniant cyllidol budgetary arrangements trefniant cyllidol budgetary control rheolaeth gyllidol budgetary controls rheolaeth gyllidol budgets cyllideb buff bwff buff bwffio buff mop mop bwffio buff mops mop bwffio buff wheel olwyn fwffio buff wheels olwyn fwffio buffer byffer buffer byffro buffer beam trawst byffer buffer beams trawst byffer buffer solution hydoddiant byffer buffer solutions hydoddiant byffer buffer spring sbring byffer buffer springs sbring byffer buffer state gwladwriaeth glustog buffer states gwladwriaeth glustog buffered input mewnbwn byfferog buffered inputs mewnbwn byfferog buffered output allbwn byfferog buffered outputs allbwn byfferog buffers byffer buffet bwffe buffets bwffe buffs bwff bug nam (=fault) bugle biwgl bugles biwgl build adeiladu build in ymgorffori building adeilad building insurance yswiriant adeiladau building insurances yswiriant adeiladau building regulation rheoliad adeiladu building regulations rheoliad adeiladu building society cymdeithas adeiladu building survey arolwg adeiladu building surveyor syrfëwr adeiladu building surveyors syrfëwr adeiladu building technology technoleg adeiladu building use survey arolwg defnyddio adeiladau buildings adeilad buildings and structures adeiladau ac adeileddau built environment sector sector amgylchedd adeiledig built environment sectors sector amgylchedd adeiledig built-in cupboard cwpwrdd gosod built-in cupboards cwpwrdd gosod built-up area ardal adeiledig built-up areas ardal adeiledig built-up stain staen adeiledig built-up stains staen adeiledig bulb bwlb bulb holder gafaelydd bwlb bulb holders gafaelydd bwlb bulbous oddfog bulbous leg coes oddfog bulbous legs coes oddfog bulbous turnery turnwriaeth oddfog bulbs bwlb bulge bolio bulge gwrym bulges gwrym bulimia bwlimia bulimias bwlimia bulk swmp bulk buying swmp brynu bulk carrier swmp gludydd bulk carriers swmp gludydd bulk materials defnyddiau swmp bulk of the goods rhan fwyaf o'r nwyddau bulk storage storfa swmp bulk storages storfa swmp bulk supplies cyflenwadau sylweddol bulk tank swmp-danc bulk tanks swmp-danc bulk transport swmpgludo bulked yarn edafedd wedi'u swmpuso bulkflow swmplif bulkflows swmplif bulking action gweithred swmpuso bulking actions gweithred swmpuso bulks swmp bulky swmpus bulky goods nwyddau swmpus bull bwla (papal) bull wheel olwyn strôc (shaper) bull wheels olwyn strôc (shaper) bull-nosed plane plaen trwyn byr bull-nosed planes plaen trwyn byr bulleted list rhestr o bwyntiau bwled bulleted lists rhestr o bwyntiau bwled bulletin bwletin bulletin board hysbysfwrdd bulletin boards hysbysfwrdd bulletins bwletin bullion bwliwn bullions bwliwn bulls bwla (papal) bully bwli (in hockey) bully off bwlïo bumper bymper bumpers bymper bun bynen bunch grass sypwellt (tussock) bund bwnd bundle sypyn bundle sheath gwain sypyn bundle sheaths gwain sypyn bundles sypyn bunds bwnd bung topyn bungaloid growth twf byngaloaidd bungaloid growths twf byngaloaidd bungalow byngalo bungalows byngalo bungs topyn bunny jump naid cwningen bunny jumps naid cwningen bunt hit bwnt bunt hits bwnt buoy bwi buoyancy hynofedd buoyancy bag bag hynofedd buoyancy bags bag hynofedd buoyancy tank tanc hynofedd buoyancy tanks tanc hynofedd buoyant hynawf bur masgl pigog (of plant) buran bwrán burans bwrán burden baich burdens baich bureau biwro bureau fall clawr biwro bureau falls clawr biwro bureaucracy biwrocratiaeth bureaucrat biwrocrat bureaucratic biwrocrataidd bureaucrats biwrocrat bureaus biwro burette bwred burettes bwred burgage tir bwrdais burgage borough bwrdeistref fwrgais burgage boroughs bwrdeistref fwrgais burgage tenure daliadaeth fwrgeisiol burgage tenures daliadaeth fwrgeisiol burgages tir bwrdais burgher bwrdais burghers bwrdais burghol bwrdeisiol burial claddedigaeth burial chamber siambr gladdu burial chambers siambr gladdu burial ground man claddu burial grounds man claddu burial mound tomen gladdu burial mounds tomen gladdu burials claddedigaeth burin ysgythrydd (graver) burins ysgythrydd (graver) burlap bwrlap burlaps bwrlap burlesque bwrlesg burlesques bwrlesg burn llosg burn llosgi burn out llwyrlosgi burn-out chwythu plwc burner llosgydd burners llosgydd burnish bwrnais burnish bwrneisio burnisher bwrneisydd burnishers bwrneisydd burnishs bwrnais burns llosg burns unit uned losgiadau burns units uned losgiadau burnt llosg burnt offering poethoffrwm burnt offerings poethoffrwm burnt sienna sienna llosg burnt siennas sienna llosg burnt umber wmber llosg burnt umbers wmber llosg burpee naid wasg burpees naid wasg burr bwr (in timber) burr min (of scraper) burr ymyl arw (on metal or paper) burrow daear (of fox) burrow twll (of rabbits) burrowing tyrchu burrows daear (of fox) burrows twll (of rabbits) burrows twyni (of sand) burrs bwr (in timber) burrs min (of scraper) burrs ymyl arw (on metal or paper) bursar bwrsar bursars bwrsar bursary bwrsari burst ebychiad burst of monsoon toriad y monsŵn burster ffrwydriad bursters ffrwydriad bursts ebychiad bus bws bus type math bws bus types math bws bush bwsh (=metal lining) bush llwyn (=shrub) bushel bwysel bushels bwysel bushmen pobl y prysglwyni bushmens pobl y prysglwyni bushs bwsh (=metal lining) bushs llwyn (=shrub) bushveld ffeld prysglwyni bushvelds ffeld prysglwyni bushy trwchus business busnes business account cyfrif busnes business accounts cyfrif busnes business activity gweithgaredd busnes business development datblygu busnes business document dogfen busnes business documents dogfen busnes business environment amgylchedd busnes business environments amgylchedd busnes business ethics moeseg busnes business function swyddogaeth fusnes business functions swyddogaeth fusnes business objective amcan busnes business objectives amcan busnes business plan cynllun busnes business plans cynllun busnes business rates trethi busnes business system system fusnes business systems system fusnes business user defnyddiwr busnes business users defnyddiwr busnes bust mynwes (=human chest) bust penddelw (in sculpture) bustline llinell fynwes bustlines llinell fynwes busts mynwes (=human chest) busts penddelw (in sculpture) butane bwtan butanes bwtan butcher cigydd butchers cigydd butt bytio butt bôn butt brazed presyddiad bôn (lathe toll forms) butt brazeds presyddiad bôn (lathe toll forms) butt end rammer hyrddwr pen ôl butt end rammers hyrddwr pen ôl butt hinge colfach ymyl butt hinges colfach ymyl butt joint uniad bôn butt joints uniad bôn butt measurement mesuriad bôn butt measurements mesuriad bôn butt mitred and keyed joint uniad bôn meitrog cudd butt mitred and keyed joints uniad bôn meitrog cudd butt mitred joint uniad bôn meitrog butt mitred joints uniad bôn meitrog butt weld weldiad bôn butt welds weldiad bôn butter menyn butter beans ffa menyn butter-nut pattern patrwm cnau menyn butter-nut patterns patrwm cnau menyn butterfat braster menyn butterfats braster menyn butterfish llyfrothen butterfishs llyfrothen butterfly glöyn byw butterfly hinge colfach glöyn byw butterfly hinges colfach glöyn byw butterfly stroke nofio pilipala buttermilk llaeth enwyn buttermilks llaeth enwyn butters menyn butterscotch cyflaith menyn butterscotches cyflaith menyn buttock ffolen buttocks ffolen button botwm button botymu button mortise mortais botwm button mortises mortais botwm button mould mowld botwm button moulds mowld botwm button polish llathr botwm button polishs llathr botwm button slot slot botwm button slots slot botwm buttonhole twll botwm buttonhole loop dolen botwm buttonhole loops dolen botwm buttonhole scissors siswrn twll botwm buttonhole stitch pwyth twll botwm buttonhole stitches pwyth twll botwm buttonhole thread edau gyfrodedd buttonhole threads edau gyfrodedd buttonholer botymell buttonholers botymell buttonholes twll botwm buttons botwm buttress bwtres (in needlework) buttress gwanas (on mountain) buttress thread edau fwtres buttress threads edau fwtres butts bôn butylate bwtyleiddio butyrate bwtyrad butyrates bwtyrad butyric acid asid bwtyrig butyric acids asid bwtyrig buy prynu buyer prynwr buyers prynwr buying price pris prynu buying prices pris prynu buzzer swnyn buzzers swnyn by instalment fesul rhandal by-election isetholiad by-elections isetholiad by-law deddf leol (=local law) by-law is-ddeddf (=subsidiary law) by-laws deddf leol (=local law) by-laws is-ddeddf (=subsidiary law) by-movement symudiad sgil by-movements symudiad sgil by-product sgil gynnyrch by-products sgil gynnyrch bye heibiad bye-stakes cil fonynnau bypass around a settlement ffordd osgoi aneddiadau bypass around a settlements ffordd osgoi aneddiadau byte beit bytes beit byway cilffordd byway open to all traffic cilffordd yn agored i bob trafnidiaeth cabbage bresychen cabbages bresychen cabin hook bach caban cabin hooks bach caban cabin lift caban codi cabin lifts caban codi cabinet cabinet cabinet file ffeil gabinet cabinet files ffeil gabinet cabinet fittings ffitiadau cabinet cabinet maker saer dodrefn cabinet makers saer dodrefn cabinet organ organ gist cabinet organs organ gist cabinet rasp rhathell gabinet cabinet rasps rhathell gabinet cabinet scraper sgrafell gabinet cabinet scrapers sgrafell gabinet cabinet screwdriver tyrnsgriw cabinet cabinet screwdrivers tyrnsgriw cabinet cabinet work gwaith dodrefn cabinet works gwaith dodrefn cabinets cabinet cable cebl cable smocking smocwaith rhaff cable smockings smocwaith rhaff cable stitch pwyth rhaff cable stitches pwyth rhaff cable yarn edafedd rhaffog cables cebl cabriole leg coes gabriol cabriole legs coes gabriol cache store storfa dros dro cache stores storfa dros dro cacophonous cacoffonig cacophony cacoffoni cactus cactws cadaver celain cadavers celain cadence diweddeb cadence chord cord diweddeb cadence chords cord diweddeb cadences diweddeb cadential diweddebol cadential 6/4 diweddeb 6/4 cadential 6/4 chord cord 6/4 diweddebol cadential 6/4 chords cord 6/4 diweddebol cadential 6/4s diweddeb 6/4 cadenza cadenza cadenzas cadenza cadmium cadmiwm (Cd) cadmium orange oren cadmiwm cadmium oranges oren cadmiwm cadmium red coch cadmiwm cadmium reds coch cadmiwm cadmium scarlet sgarlad cadmiwm cadmium scarlets sgarlad cadmiwm cadmium yellow melyn cadmiwm cadmium yellows melyn cadmiwm cadmiums cadmiwm (Cd) caducous byrhoedlog (=fleeting, transitory) caducous cwympol (in botany) caecum caecwm caecums caecwm caesium cesiwm (Cs) caesium chloride cesiwm clorid caesium chlorides cesiwm clorid caesium surface arwyneb cesiwm caesium surfaces arwyneb cesiwm caesiums cesiwm (Cs) caffeine caffein caffeines caffein café caffi cafés caffi cage cawell cages cawell cairn carnedd cairns carnedd cake teisen cake glue glud slab cake glues glud slab cakes teisen calamine calamin calamines calamin calcareous calchaidd calcification calcheiddiad calcifications calcheiddiad calcified matrix matrics calcheiddiedig calcified matrixes matrics calcheiddiedig calcifuge calchgas calcify calcheiddio calcinate calchynnu calcination calchyniad calcinations calchyniad calciphile calchgar calciphobe calchgas calcite calchit calcites calchit calcitonin calsitonin calcitonins calsitonin calcium calsiwm (Ca) calcium carbide calsiwm carbid calcium carbides calsiwm carbid calcium carbonate calsiwm carbonad calcium carbonates calsiwm carbonad calcium oxide calsiwm ocsid calcium oxides calsiwm ocsid calcium silicate calsiwm silicad calcium silicates calsiwm silicad calciums calsiwm (Ca) calculate cyfrifo calculating machine peiriant cyfrifo calculating machines peiriant cyfrifo calculating method dull cyfrifo calculating methods dull cyfrifo calculation cyfrifiad calculations cyfrifiad calculator cyfrifiannell calculator display dangosydd cyfrifiannell calculators cyfrifiannell calculus calcwlws calculus of variation calcwlws amrywiad caldera callor calderas callor calendar calendr calendars calendr calf croth y goes (of leg) calf muscle cyhyr croth y goes calf muscles cyhyr croth y goes calfs croth y goes (of leg) calgon calgon calgons calgon calibrate graddnodi calibrated wedi'i graddnodi (with feminine nouns) calibrated wedi'i raddnodi (with masculine nouns) calibration graddnodiad calibration constant cysonyn graddnodiad calibration constants cysonyn graddnodiad calibration mark graddnod calibration marks graddnod calibrations graddnodiad calico calico calico buff bwff calico calico buffs bwff calico calico mop mop calico calico mops mop calico calico patch clwt calico calico patches clwt calico californium califforniwm (Cf) californiums califforniwm (Cf) calkin cawc (horse shoe) calkins cawc (horse shoe) call galw call galwad call by name galw wrth enw call by value galw wrth werth calligraphic caligraffig calligraphic hand llaw galigraffig calligraphic hands llaw galigraffig calligraphist caligraffydd calligraphists caligraffydd calligraphy caligraffeg calling sequence dilyniant galw calling sequences dilyniant galw calliper caliper calliper gauge medrydd caliper calliper gauges medrydd caliper callipers caliper calls galwad callus caleden calm gosteg calms gosteg calorie calori calories calori calorific caloriffig calorific value gwerth caloriffig calorific values gwerth caloriffig calorifier caloriffydd calorifiers caloriffydd calorimeter calorimedr calorimeters calorimedr calorimetric technique techneg galorimetrig calorimetric techniques techneg galorimetrig calorimetry calorimedreg calorizing caloreiddio calving ymrannu (in geomorphology) calypso cân galypso calyx calycs calyx eye needle nodwydd llygad agored calyx eye needles nodwydd llygad agored calyxes calycs cam cam cam follower dilynwr cam cam followers dilynwr cam cam profile proffil cam cam profiles proffil cam camber cambr camber cambro camber arch bwa cambr camber arches bwa cambr cambers cambr cambiata cambiata cambiatas cambiata cambium cambiwm cambium layer haen gambiwm cambium layers haen gambiwm cambiums cambiwm cambric cambrig cambrics cambrig camcorder video clip clip fideo camcordor camcorder video clips clip fideo camcordor camel hair brush brwsh blew camel camel hair brushs brwsh blew camel cameo cameo camera camera camera still images delweddau camera llonydd cameras camera camiknickers nicers cami camisole camisol camisoles camisol camomile camil camomiles camil camouflage cuddliw camouflage cuddliwio camouflages cuddliw camp gwersyll camp stool stôl blygu camp stools stôl blygu campaign ymgyrch campaign ymgyrchu campaigns ymgyrch campanology campanoleg camps gwersyll campus campws camshaft camsiafft camshafts camsiafft canal camlas canalicular camlesynnaidd canalicus camlesyn canals camlas canapés canapés cancel diddymu (in music) cancellation diddymiad (in music) cancellations diddymiad (in music) cancer canser cancer of the bowel canser y coluddyn cancers canser cancrizans cancrizans candid didwyll candidate ymgeisydd candidates ymgeisydd candied peel candi pîl candied peels candi pîl candle cannwyll candle grease gwêr cannwyll candle greases gwêr cannwyll candle-power canhwyllnerth candle-powers canhwyllnerth candles cannwyll candlestick canhwyllbren candlesticks canhwyllbren candlewick pabwyrgotwm candlewicks pabwyrgotwm cane gwialen cane sugar siwgr cansen cane sugars siwgr cansen canes gwialen canework gwaith gwiail caneworker's bodkin botgin gweithiwr gwiail caneworker's bodkins botgin gweithiwr gwiail caneworker's hammer morthwyl gweithiwr gwiail caneworker's hammers morthwyl gweithiwr gwiail caneworker's pliers gefelen gweithiwr gwiail caneworks gwaith gwiail canine tooth dant llygad canine tooths dant llygad canker cancr cankers cancr canned food bwyd tun canned foods bwyd tun cannel coal glo cannwyll cannel coals glo cannwyll cannery canerdy canning canio canning industry diwydiant canio cannon magnel cannon ball pêl fagnel cannon ball service serfiad canon cannon ball services serfiad canon cannon balls pêl fagnel cannons magnel cannula caniwla cannulas caniwla canoe canŵ canoes canŵ canon canon (in music) canon canon (of law) canon canon (of person) canon at the fifth canon yn y pumed canon at the octave canon yn yr wythfed canon at the unison canon unsain canon by augmentation canon drwy estyniad canon by diminution canon drwy gywasgiad canon by inversion canon drwy wrthdro canon law cyfraith eglwysig (in general) canon laws cyfraith eglwysig (in general) canon per arsin et thesin canon per arsin et thesin canon per arsin et thesins canon per arsin et thesin canon recte et retro canon recte et retro canon rectus et inversus canon rectus et inversus canonic imitation dynwarediad canonaidd canonic imitations dynwarediad canonaidd canonical canonaidd canonical form ffurf ganonaidd canonical forms ffurf ganonaidd canonical penalty penyd canonaidd canonize canoneiddio canonry canoniaeth canonry magnelaeth canons canon (in music) canons canon (of law) canons canon (of person) canopy canopi cant goleddu cantata cantata cantatas cantata canteen ffreutur canteen staff staff ffreutur canteens ffreutur canticle cantigl canticles cantigl cantilena cantilena cantilenas cantilena cantilever cantilifer cantilevered beam trawst cantilifer cantilevered beams trawst cantilifer cantilevers cantilifer canting saw llif oleddu canting saws llif oleddu canting table bwrdd goleddu canting tables bwrdd goleddu canton canton cantons canton cantor cantor cantoris cantoris cantors cantor cantus fermus cantus fermus canvas cynfas canvas backing cefn cynfas canvas backings cefn cynfas canvas board bwrdd cynfas canvas boards bwrdd cynfas canvas boot esgid gynfas canvas boots esgid gynfas canvas embroidery brodwaith cynfas canvas grain graen cynfas canvas grains graen cynfas canvas pin pìn cynfas canvas pins pìn cynfas canvas stitch pwyth cynfas canvas stitches pwyth cynfas canvas straining tynhau cynfas canvas stretcher estynnwr cynfas canvas stretchers estynnwr cynfas canvass canfasio canyon canion canyons canion canzona canzona canzonas canzona canzonet canzonetta canzonets canzonetta cap cap (machine screws) cap cell cell gapan cap cells cell gapan cap iron haearn cefn cap irons haearn cefn cap rock capgraig cap rocks capgraig cap sleeve llawes gap cap sleeves llawes gap capability gallu capable galluog capacitance cynhwysiant capacitances cynhwysiant capacitive cynhwysaidd capacitor cynhwysydd (=condenser) capacitor-load cynhwysydd-llwyth capacitor-loads cynhwysydd-llwyth capacitors cynhwysydd (=condenser) capacity cynhwysedd cape clogyn (=cloak) cape penrhyn (=headland) caper capryn (for cooking) capers capryn (for cooking) capes clogyn (=cloak) capes penrhyn (=headland) caphead screw sgriw ben cap caphead screws sgriw ben cap capillarity capilaredd capillary capilari capillary bed gwely capilarïau capillary beds gwely capilarïau capillary network rhwyllen capilarïau capillary networks rhwyllen capilarïau capillary rise codiad capilari capillary rises codiad capilari capillary sphincter sffincter capilari capillary sphincters sffincter capilari capillary tube tiwb capilari capillary tubes tiwb capilari capillary web gwe capilarïau capillary webs gwe capilarïau capital cyfalaf (finance) capital galeri (of Gothic harp) capital pen (of harp) capital prifddinas (city) capital account cyfrif cyfalaf capital accounts cyfrif cyfalaf capital accumulation cronnedd cyfalaf capital accumulations cronnedd cyfalaf capital allowance lwfans cyfalaf capital allowances lwfans cyfalaf capital depreciation dibrisiad cyfalaf capital depreciations dibrisiad cyfalaf capital expenditure gwariant cyfalaf capital expenditures gwariant cyfalaf capital gain enillion cyfalaf capital gains tax treth enillion cyfalaf capital gains taxes treth enillion cyfalaf capital goods nwyddau cyfalaf capital growth twf cyfalaf capital growths twf cyfalaf capital input mewnbwn cyfalaf capital inputs mewnbwn cyfalaf capital intensive cyfalaf-ddwys capital letter priflythyren capital letters priflythyren capital offence trosedd farwol capital offences trosedd farwol capital punishment cosb eithaf capital punishments cosb eithaf capital sum swm cyfalaf capital sums swm cyfalaf capitalism cyfalafiaeth capitalisms cyfalafiaeth capitalist cyfalafol capitalist cyfalafwr capitalist agriculture amaethyddiaeth gyfalafol capitalist agricultures amaethyddiaeth gyfalafol capitalists cyfalafwr capitals cyfalaf (finance) capitals galeri (of Gothic harp) capitals pen (of harp) capitals prifddinas (city) capitate flower fflurben capitate flowers fflurben capitation allowance lwfans y pen capitation allowances lwfans y pen capitation grant grant y pen capitation grants grant y pen capitation tax treth y pen capitation taxes treth y pen capitular cabidylwr capitulars cabidylwr capitulate ildio capon caprwn capons caprwn capotasto branell cappella cappella cappellas cappella capriccio capriccio capsize dymchwel capsize drill dril dymchwel capsize drills dril dymchwel capstone maen capan capstones maen capan capsular capsiwlaidd capsule capsiwl (in botany) capsule cwpan (in physiology) capsules capsiwl (in botany) capsules cwpan (in physiology) captain capten captaincy capteniaeth captains capten caption pennawd captions pennawd capture cipio (in computing) capture dal (a particle) caput capwt caputs capwt car hire llogi car car industry diwydiant ceir caramel caramel caramelization carameleiddio caramels caramel carapace argragen carapaces argragen caravel carafel caravels carafel caraway seed hedyn carwe caraway seeds hedyn carwe carbanion carbanion carbanions carbanion carbide tipped blaen carbid carbohydrate carbohydrad carbohydrates carbohydrad carbon carbon (C) carbon cycle cylchred garbon carbon cycles cylchred garbon carbon dating dyddio carbon carbon dioxide carbon deuocsid carbon dioxides carbon deuocsid carbon monoxide carbon monocsid carbon monoxides carbon monocsid carbon paper papur carbon carbon papers papur carbon carbon racket raced carbon carbon rackets raced carbon carbon steel dur carbon carbon steels dur carbon carbon tetrachloride carbon tetraclorid carbon tetrachlorides carbon tetraclorid carbonate carbonad carbonated carbonedig carbonates carbonad carbonation carbonadu carbonic acid asid carbonig carbonic acids asid carbonig carbonic anhydrase carbonig anhydras carboniferous carbonifferaidd carboniferous limestone calchfaen carbonifferaidd carboniferous limestones calchfaen carbonifferaidd carbonization carboneiddiad carbonizations carboneiddiad carbonize carboneiddio carbons carbon (C) carborundum carborwndwm carborundum stone carreg hogi carborundum stones carreg hogi carborundums carborwndwm carboxyhaemoglobin carbocsihaemoglobin carboxyhaemoglobins carbocsihaemoglobin carboxylation carbocsyleiddiad carboxylations carbocsyleiddiad carboxylic carbocsylig carboxylic acid asid carbocsylig carboxylic acids asid carbocsylig carboxymethyl-cellulose carbocsimethyl-cellwlos (CMC) carboxymethyl-celluloses carbocsimethyl-cellwlos (CMC) carburettor carbwradur carburettors carbwradur carburize carbwreiddio carcass sgerbwd carcass construction adeiladwaith sgerbwd carcass constructions adeiladwaith sgerbwd carcinogen carsinogen carcinogenic carsinogenaidd carcinogens carsinogen card cerdyn card cribo card code cod cerdyn card codes cod cerdyn card column colofn gerdyn card columns colofn gerdyn card cutter torrwr cerdyn card cutters torrwr cerdyn card feed porthydd cardiau card feeds porthydd cardiau card field maes cerdyn card fields maes cerdyn card format fformat cerdyn card formats fformat cerdyn card hopper hopran gardiau card hoppers hopran gardiau card image delwedd cerdyn card images delwedd cerdyn card index mynegai cardiau card indexes mynegai cardiau card jam tagfa gardiau card jams tagfa gardiau card knife cyllell torri cerdyn card knifes cyllell torri cerdyn card loom gwŷdd cerdyn card looms gwŷdd cerdyn card punch tyllwr cardiau card punches tyllwr cardiau card puppet pyped cerdyn card puppets pyped cerdyn card reader darllenydd cardiau card readers darllenydd cardiau card reproducer dyblygydd cardiau card reproducers dyblygydd cardiau card stacker pentyrrwr cardiau card stackers pentyrrwr cardiau card stacking pentyrru cardiau card template patrymlun cerdyn card templates patrymlun cerdyn card verifier gwiriwr cardiau card verifiers gwiriwr cardiau card wreck drylliad cardiau card wrecks drylliad cardiau cardboard cardbord cardboard model model cardbord cardboard models model cardbord cardboard tube tiwb cardbord cardboard tubes tiwb cardbord cardboards cardbord carder cribwr carders cribwr cardiac cardiaidd cardiac arrest ataliad y galon cardiac arrests ataliad y galon cardiac cycle cylchred gardiaidd cardiac cycles cylchred gardiaidd cardiac disease afiechyd y galon cardiac diseases afiechyd y galon cardiac output allbwn y galon cardiac outputs allbwn y galon cardigan cardigan cardigans cardigan cardinal cardinal cardinal number rhif prifol cardinal numbers rhif prifol cardinal point pwynt prifol cardinal points pwynt prifol cardinals cardinal carding brush brwsh ffeil carding brushs brwsh ffeil cardioid cardioid cardioids cardioid cardiologist cardiolegydd cardiologists cardiolegydd cardiology cardioleg cardiopulmonary resuscitation adfywio'r galon a'r ysgyfaint cardiovascular centre canolfannyn cardiofasgwlar cardiovascular centres canolfannyn cardiofasgwlar cardiovascular health iechyd cardiofasgwlar cardiovascular healths iechyd cardiofasgwlar cardiovascular system system gardiofasgwlar cardiovascular systems system gardiofasgwlar cards cerdyn care gofal care and after-care gofal ac ôl-ofal care centre canolfan gofal care centres canolfan gofal care home cartref gofal care homes cartref gofal care label label gofal care labels label gofal care management rheoli gofal care management process proses reoli gofal care manager rheolwr gofal care managers rheolwr gofal care needs anghenion gofal care of the elderly gofal yr henoed care of the environment gofal am yr amgylchedd care order gorchymyn gofal care orders gorchymyn gofal care plan cynllun gofalu care plans cynllun gofalu care practice arferion gofal care staff staff gofal care unit uned gofal care units uned gofal care value gwerthoedd gofal care value base sylfaen gwerthoedd gofal care value bases sylfaen gwerthoedd gofal care value component cydran gwerth gofal care value components cydran gwerth gofal care worker gweithiwr gofal care workers gweithiwr gofal career gyrfa career choice dewis gyrfa career choices dewis gyrfa career guidance arweiniad ar yrfa career guidances arweiniad ar yrfa career objective amcan gyrfaol career objectives amcan gyrfaol career opportunity cyfle gyrfaol career planning cynllunio ar gyfer gyrfa career prospects rhagolygon am yrfa career service gwasanaeth gyrfaoedd career services gwasanaeth gyrfaoedd careers gyrfa careers education addysg gyrfaoedd careers educations addysg gyrfaoedd careers teacher athrawes yrfaoedd (female) careers teacher athro gyrfaoedd (male) careers teachers athrawes yrfaoedd (female) careers teachers athro gyrfaoedd (male) carer gofalwr carers gofalwr cares gofal caret lleolnod caretaker gofalwr caretaker government llywodraeth ofalu caretaker governments llywodraeth ofalu caretakers gofalwr carets lleolnod caricature gwawdlun caricatures gwawdlun caricaturist gwawdlunydd caricaturists gwawdlunydd caries pydredd dannedd carillon carilon (=instrument) carillon clychau (=bells) carillon tôn glychau (=tune) carillons carilon (=instrument) carillons tôn glychau (=tune) caring services gwasanaethau gofal carmine carmin carmines carmin carnauba wax cwyr carnawba carnauba waxes cwyr carnawba carnivore cigysydd carnivores cigysydd carnivorous cigysol carob carob carobs carob carol carol carols carol carotene caroten carotenes caroten carotenoid carotenyn carotenoids carotenyn carotid artery rhydweli garotid carotid body corffyn carotid carp carp carpal carpal carpals carpal carpel carpel carpels carpel carpenter saer coed carpenter's pencil pensil saer carpenter's pencils pensil saer carpenters saer coed carpentry gwaith saer carpentry and joinery gwaith saer ac asiedydd carpet carped carpet sweeper ysgubwr carpedi carpet sweepers ysgubwr carpedi carpet underlay isgarped carpets carped carpogonium carpogoniwm carpogoniums carpogoniwm carps carp carr ffen carrack carac carracks carac carriage cludiant (=transport) carriage cludydd (=lathe part) carriage bolt bollt wagen carriage bolts bollt wagen carriage return dychwelydd carriage returns dychwelydd carriages cludiant (=transport) carriages cludydd (=lathe part) carriageway ffordd gerbydau carrier cariwr (lathe dog) carrier cludydd (in general) carrier language iaith gyfarwyddyd carrier languages iaith gyfarwyddyd carrier molecule moleciwl cludo carrier molecules moleciwl cludo carrier pulse train curiadau'r don gario carrier wave ton gario carrier waves ton gario carriers cariwr (lathe dog) carriers cludydd (in general) carrot moronen carrots moronen carrs ffen carry car-rif carry cario carry bit did cario carry bits did cario carry flag lluman cario carry flags lluman cario carry out cynnal (an experiment) carry out a fair test cynnal prawf teg carry prediction circuit cylched ragfynegi car-rif carry prediction circuits cylched ragfynegi car-rif carry the baton cario'r batwn carrycot caricot carrycot stand stand caricot carrycot stands stand caricot carrycots caricot carrying capacity cynhwysedd cludo carrying figure ffigur i'w gario carrying figures ffigur i'w gario carrying service gwasanaeth cludo carrying services gwasanaeth cludo cartel cartel cartelize carteleiddio cartels cartel cartilage cartilag cartilages cartilag cartilaginous cartilagaidd cartilaginous fish pysgodyn cartilagaidd cartilaginous fishs pysgodyn cartilagaidd cartographic cartograffig cartographic information gwybodaeth gartograffig cartographic informations gwybodaeth gartograffig cartographic material deunydd cartograffig cartographic materials deunydd cartograffig cartography cartograffeg carton carton cartons carton cartoon cartŵn cartoons cartŵn cartridge cetrisen cartridge brass pres cetris cartridge disk disg cetrisen cartridge disks disg cetrisen cartridge paper papur cetris cartridge papers papur cetris cartridges cetrisen cartulary cartwlari cartwheel olwyn dro (in athletics) cartwheel olwyndroi cartwheels olwyn dro (in athletics) carucate carwgad carucates carwgad caruncle carwngl caruncles carwngl carve cerfio carved cerfiedig carved head pen cerfiedig carved heads pen cerfiedig carver cerfiwr (of person) carver cyllell gerfio (=carving knife) carvers cerfiwr (of person) carvers cyllell gerfio (=carving knife) carving cerfiad carving chisel cŷn cerfio carving chisels cŷn cerfio carving mallet gordd gerfio carving mallets gordd gerfio carvings cerfiad caryatid caryatid caryatids caryatid cascade rhaeadr cascade rhaeadru cascaded rhaeadrol cascades rhaeadr case achos (in general) case cas (for carrying) case conference cynhadledd achos case conferences cynhadledd achos case hardened wedi'i grofennu case hardening crofennu case history hanes achos case law cyfraith achosion case laws cyfraith achosion case load baich achosion case loads baich achosion case record cofnod achos case records cofnod achos case study astudiaeth achos casein casein casein colour lliw casein casein colours lliw casein casein glue glud casein casein glues glud casein caseinogen caseinogen caseinogens caseinogen caseins casein casement fastener ffasnydd ffenestr adeiniog casement fasteners ffasnydd ffenestr adeiniog casement window ffenestr adeiniog casement windows ffenestr adeiniog cases achos (in general) cases cas (for carrying) cash arian parod cash allocation dyraniad arian cash allocations dyraniad arian cash and carry shop siop talu a chludo cash and carry shops siop talu a chludo cash book dyddlyfr arian cash books dyddlyfr arian cash dispenser peiriant arian cash dispensers peiriant arian cash flow llif arian cash flow forecast rhagolwg llif arian cash flow forecasts rhagolwg llif arian cash flows llif arian cash limit cyfyngiad arian cash limited budget cyllideb arian cyfyngedig cash limited budgets cyllideb arian cyfyngedig cash limits cyfyngiad arian cash machine peiriant arian parod cash machines peiriant arian parod cash payment taliad arian parod cash payments taliad arian parod cash value gwerth ariannol cash values gwerth ariannol cashless society cymdeithas heb arian parod cashs arian parod casing casin casings casin casket blwch gemau (for jewellery) caskets blwch gemau (for jewellery) cassava casafa cassavas casafa casserole caserol casseroles caserol cassette casét cassette player chwaraeydd casét cassette players chwaraeydd casét cassette recorder recordydd casét cassette recorders recordydd casét cassettes casét cassiterite casiterit cassiterites casiterit cassock casog cassocks casog cast bwrw cast camdroi (out of shape) cast iron haearn bwrw cast iron vice feis haearn bwrw cast iron vices feis haearn bwrw cast irons haearn bwrw cast off cau pwythau (in knitting) cast on ystofi pwythau (in knitting) cast out troi allan cast steel dur bwrw cast steels dur bwrw castanet castanét castanets castanét caste cast caste system cyfundrefn gast caste systems cyfundrefn gast castellan castellydd castellans castellydd castellated castellaidd (=castle-like) castellated castellog (=having battlements) castellated prop ateg gastellaidd castellated props ateg gastellaidd castellation castelliad castellations castelliad caster sugar siwgr mân caster sugars siwgr mân castes cast casting castin casting castio casting apparatus cyfarpar castio casting down castio i lawr casting plaster castin plastr casting plasters castin plastr casting up castio i fyny casting vote pleidlais fwrw casting votes pleidlais fwrw castings castin castle castell castle nut nyten gastell castle nuts nyten gastell castleguard gwarchodaeth castell castleguards gwarchodaeth castell castles castell castor castor castors castor casual employment gwaith ysbeidiol casual employments gwaith ysbeidiol casual labour llafur ysbeidiol casual labours llafur ysbeidiol casual unemployment diweithdra ysbeidiol casual unemployments diweithdra ysbeidiol casual water dŵr achlysurol casual waters dŵr achlysurol casuals dillad segura casualty anafedig (=injured person) casualty damwain (=accident) casuistry twyllresymeg cat-o'-nine-tails fflangell catabatic catabatig catabolic catabolig catabolism catabolaeth catabolisms catabolaeth catabolite catabolyn catabolites catabolyn catalase catalas catalases catalas catalogue catalog catalogue catalogio catalogue number rhif yn y catalog catalogue numbers rhif yn y catalog catalogues catalog catalyse catalyddu catalysis catalysis catalyst catalydd catalysts catalydd catalytic catalytig catalytic hydrogenation hydrogeniad catalytig catalytic hydrogenations hydrogeniad catalytig cataract cataract cataracts cataract catastrophism trychinebedd catastrophisms trychinebedd catastrophizing trychinebu catch clicied (of door) catch dal catch daliad (of ball etc) catch a crab cranca catch crop byrgnwd catch crops byrgnwd catch plate plât cydio catch plates plât cydio catch stitch pwyth cydio catch stitched hem hem pwyth cudd catch stitched hems hem pwyth cudd catch stitches pwyth cydio catch weights pwysau agored catcher daliwr catchers daliwr catches clicied (of door) catches daliad (of ball etc) catchment dalgylch catchment area dalgylch catchment areas dalgylch catchments dalgylch catchy gafaelgar catechism catecism (in general) catechism holwyddoreg (in Welsh Nonconformity) catechisms catecism (in general) catechisms holwyddoreg (in Welsh Nonconformity) catecholamine catecolamin catecholamines catecolamin categorize categoreiddio catena catena catenary catena catenas catena catenate cadwyno catenation cadwynedd catenations cadwynedd catenoid catenoid catenoids catenoid cater arlwyo (food) cater darparu (=provide) caterer arlwywr caterers arlwywr catering arlwyo catering and hotel trade masnach arlwyo a gwestya catering and hotel trades masnach arlwyo a gwestya caterpillar lindysyn caterpillars lindysyn catgut coludd catguts coludd cathartic carthydd cathartics carthydd cathedral eglwys gadeiriol cathedral close clos eglwys gadeiriol cathedral closes clos eglwys gadeiriol cathedrals eglwys gadeiriol catheter cathetr catheters cathetr cathode catod cathode ray pelydryn catod cathodes catod cathodic catodig catholic catholig (=universal) catholic pabyddol (of Roman Catholic Church) catholic mass offeren Babyddol cation catïon cation exchange column colofn cyfnewid catïonau cation exchange columns colofn cyfnewid catïonau cationic cationig cations catïon catkin cynffon oen bach (hazel) catkins cynffon oen bach (hazel) catspring naid cath catsprings naid cath cattle cake cêc gwartheg cattle cakes cêc gwartheg cattle range maestir gwartheg cattle ranges maestir gwartheg caudal cynffonnol caudal vertebra fertebra cynffonnol caudal vertebras fertebra cynffonnol caught out allan drwy ddal (in cricket) caul gwasgblat caul veneering argaenu gwasgblat cauldron pair cauldrons pair cauliflower blodfresychen cauliflower cheese blodfresych caws cauliflowers blodfresychen caulk calcio caulking strip stribed calcio caulking strips stribed calcio caulking tool erfyn calcio caulking tools erfyn calcio cauls gwasgblat causal achosol causal phase cyfnod achosol causal phases cyfnod achosol causal relationship perthynas achosol causal relationships perthynas achosol causalgia llosgwayw causalgias llosgwayw causation achosiaeth (=causality) causations achosiaeth (=causality) causative factor ffactor achosol causative factors ffactor achosol cause achosi cause of pollution achos llygredd causes of ill health achosion afiechyd causeway sarn causeway camp gwersyll sarnau causeway camps gwersyll sarnau caustic curve cromlin gawstig caustic curves cromlin gawstig caustic soda soda brwd caustic sodas soda brwd caution gofal (=care) caution rhybudd (=warning) cautions gofal (=care) cautions rhybudd (=warning) cavalier cafaliraidd cavalier cafalîr cavaliers cafalîr cavalry gwŷr meirch cavalry twill cafalri caerog cavalry twills cafalri caerog cavatina cafatina cavatinas cafatina cave ogof cave dwelling ogof-annedd cave dwellings ogof-annedd cave painting paentiad ogof cave paintings paentiad ogof cavern ceudwll cavernous ceudyllog caverns ceudwll caves ogof cavetto moulding mowldin cafeto cavetto mouldings mowldin cafeto cavetto panel panel cafeto cavetto panels panel cafeto caviare cafiar caviares cafiar cavity ceudod cavity wall wal geudod cavity walls wal geudod cay cai cayenne cayenne cayennes cayenne cedar cedrwydden cedar oil olew cedrwydden cedar oils olew cedrwydden cedars cedrwydden cedarwood pencil pensil pren cedrwydd cedarwood pencils pensil pren cedrwydd cede ildio ceiling nenfwd ceiling joist trawst nenfwd ceiling joists trawst nenfwd ceiling rack rhesel nenfwd ceiling racks rhesel nenfwd ceilings nenfwd cejuela cejuela cejuelas cejuela celadon seladon (green colour) celadons seladon (green colour) celebrate dathlu celebration dathliad celebrations dathliad celery seleri celesta selesta celestas selesta celestial wybrennol celestial equator cyhydedd wybrennol celestial equators cyhydedd wybrennol celestial sphere sffêr wybrennol celestial spheres sffêr wybrennol celibacy ymgadw'n ddibriod cell cell cell body cellgorff cell division cellraniad cell divisions cellraniad cell membrane cellbilen cell membranes cellbilen cell plate cellblat cell plates cellblat cell pore celldwll cell pores celldwll cell production cynhyrchu celloedd cell sap cellnodd cell saps cellnodd cell surface arwyneb y gell cell surfaces arwyneb y gell cell wall cellfur cell walls cellfur cell-free di-gell cellarer selerwr cellarers selerwr cellarium seler cellariums seler cellist sielydd cellists sielydd cello sielo cellophane seloffan cellophanes seloffan cells cell cellular cellog cellular adhesive gludydd cellog cellular adhesives gludydd cellog cellular respiration resbiradaeth gellog cellular respirations resbiradaeth gellog cellular structure adeiledd cellog cellular structures adeiledd cellog celluloid cellwloid celluloids cellwloid cellulose cellwlos cellulose finish gorffeniad cellwlos cellulose finishs gorffeniad cellwlos cellulose lacquer lacr cellwlos cellulose lacquers lacr cellwlos cellulose paste past cellwlos cellulose paste powder powdr past cellwlos cellulose paste powders powdr past cellwlos cellulose pastes past cellwlos celluloses cellwlos cellulosics cellwlosigion cembalo cembalo cement sment cement smentio cementation smentiad cementation of sediments smentiad gwaddodion cementations smentiad cemented carbide sment carbid cemented carbides sment carbid cementite smentit cementites smentit cements sment censer thuser (in church) censers thuser (in church) censor sensor censors sensor censorship sensoriaeth censorships sensoriaeth censure cerydd censures cerydd census cyfrifiad census data data cyfrifiad census return ffurflen gyfrifiad census returns ffurflen gyfrifiad centenary canmlwyddiant centigrade canradd centile canradd centile chart siart canraddau centile charts siart canraddau centile rank safle canrannol centile ranks safle canrannol centiles canradd centilitre centilitr centilitres centilitr centimetre centimetr (cm) centimetres centimetr (cm) central agitator cynhyrfydd canolog central agitators cynhyrfydd canolog central bank banc canolog central banks banc canolog central business district canol busnes y dref (C.B.D.) central business districts canol busnes y dref (C.B.D.) central canal tiwb canolog central canals tiwb canolog central care area ardal gofalon canolog central care areas ardal gofalon canolog central column colofn ganolog central columns colofn ganolog central core craidd canolog central cores craidd canolog central government llywodraeth ganolog central governments llywodraeth ganolog central heating gwres canolog central heatings gwres canolog central nervous system prif system nerfol central nervous systems prif system nerfol central perspective persbectif canolog central perspectives persbectif canolog central processing unit uned brosesu ganolog (CPU) central processing units uned brosesu ganolog (CPU) central processor prosesydd canolog central processors prosesydd canolog central venous pressure pwysedd gwythiennol canolog central venous pressures pwysedd gwythiennol canolog centrality canolrwydd centralization canoli centralize canoli centralized canoledig centre canol (=middle point) centre canolbwynt (of attention etc) centre canolfan (=place or group of buildings) centre canolfannyn (brain) centre canoli centre canolwr (person in sport) centre back canol cefn centre backs canol cefn centre bar bar canol (lettering) centre bars bar canol (lettering) centre bit ebill canoli centre bits ebill canoli centre cane gwialen ganol centre canes gwialen ganol centre circle cylch canol centre circles cylch canol centre coordinator cydlynydd canolfan centre coordinators cydlynydd canolfan centre dotting canolfarcio centre drill dril canoli (slocombe) centre drills dril canoli (slocombe) centre front canol blaen centre fronts canol blaen centre hinge colfach canol centre hinges colfach canol centre lathe turn canol centre lathes turn canol centre line llinell ganol centre lines llinell ganol centre of balance ffwlcrwm centre of curvature craidd crymedd centre of excellence canolfan rhagoriaeth centre of gravity craidd disgyrchiant centre of mass craidd màs centre of percussion craidd taro centre of pressure canolbwynt gwasgedd centre of rotation canol cylchdro centre of similitude pwynt cyfluniant centre of symmetry canol cymesuredd centre of the court canol y cwrt centre outfielder maeswr canol centre outfielders maeswr canol centre pass pàs gyntaf centre point canolbwynt centre points canolbwynt centre popping canolbopio centre punch pwnsh canoli centre punches pwnsh canoli centre punching canolbwnsio centre serving line llinell serfio ganol centre serving lines llinell serfio ganol centre spot marc canol centre spots marc canol centre square sgwâr canoli centre squares sgwâr canoli centre the ball canoli'r bêl centre-face atom atom canol-yr-wyneb centre-face atoms atom canol-yr-wyneb centre-half canolwr centre-halfs canolwr centreboard bwrdd canol centreboards bwrdd canol centred canolog centres canol (=middle point) centres canolbwynt (of attention etc) centres canolfan (=place or group of buildings) centres canolfannyn (brain) centres canolwr (person in sport) centrifugal allgyrchol centrifugal casting castio allgyrchol centrifugal force grym allgyrchol centrifugal forces grym allgyrchol centrifuge allgyrchu centrifuge allgyrchydd centrifuges allgyrchydd centring canoli centriole centriol centrioles centriol centripetal mewngyrchol centripetal force grym mewngyrchol centripetal forces grym mewngyrchol centroid craidd centroids craidd centromere centromer centromeres centromer centrosome centrosom centrosomes centrosom century canrif century centuria (=unit of soldiers) cephalic ceffalig cephalic index indecs ceffalig cephalic indexes indecs ceffalig cephalisation ceffaleiddiad cephalisations ceffaleiddiad cephalo- ceffalo- ceramic ceramig ceramic stilts stiltiau ceramig ceramic tile teilsen geramig ceramic tiles teilsen geramig ceramics cerameg cerdd dant cerdd dant cerdd dant arrangement trefniant cerdd dant cerdd dant arrangements trefniant cerdd dant cerdd dants cerdd dant cereal grawnfwyd cereals grawnfwyd cerebellum cerebelwm cerebellum ymennydd bach cerebellums cerebelwm cerebellums ymennydd bach cerebral cerebrol cerebral ymenyddol cerebral cortex cortecs cerebrol cerebral cortexes cortecs cerebrol cerebral haemorrhage gwaedlif ar yr ymennydd cerebral haemorrhages gwaedlif ar yr ymennydd cerebral hemisphere hemisffer cerebrol cerebral hemispheres hemisffer cerebrol cerebral palsy parlys yr ymennydd cerebrospinal cerebrosbinol cerebrospinal fluid hylif yr ymennydd cerebrospinal fluids hylif yr ymennydd cerebrovascular accident damwain gerebrofasgwlar cerebrovascular accidents damwain gerebrofasgwlar cerebrum cerebrwm cerebrums cerebrwm ceremony seremoni cerise ceirios cerises ceirios cerium ceriwm (Ce) ceriums ceriwm (Ce) certain sicr certificate tystysgrif certificates tystysgrif certification ardystio (in general) certification rhoi tystysgrif (of film) certified seed had ardyst certified seeds had ardyst certify ardystio cerulean blue glas y nen cerulean blues glas y nen cervical cerfigol cervical smear prawf gwddf y groth cervical smears prawf gwddf y groth cervical vertebra fertebra gyddfol cervical vertebras fertebra gyddfol cervix gwddf y groth (=neck of womb) cervixes gwddf y groth (=neck of womb) cesspool carthbwll cesspools carthbwll chaconne chaconne chaconnes chaconne chaetae caetae chafe rhathu chafing rhathiad chafings rhathiad chain cadwyn chain cadwyno chain drilling drilio cadwynol chain drive gyriant cadwyn chain drives gyriant cadwyn chain line llinell gadwyn chain lines llinell gadwyn chain link dolen gadwyn chain links dolen gadwyn chain mechanism mecanwaith cyswllt chain mechanisms mecanwaith cyswllt chain molecules moleciwlau cadwynol chain of command cadwyn awdurdod chain of production cadwyn gynhyrchu chain printer argraffydd cadwyn chain printers argraffydd cadwyn chain reaction adwaith cadwynol chain reactions adwaith cadwynol chain reflex atgyrch cadwynol chain reflexes atgyrch cadwynol chain riveting rhybedu cadwynol chain rule rheol cadwyn chain rules rheol cadwyn chain stitch pwyth cadwyn chain stitches pwyth cadwyn chain store siop gadwyn chain stores siop gadwyn chain survey tirfesur cadwyn chain wrench tyndro cadwyn chain wrenches tyndro cadwyn chained cadwynog chained feather stitch pwyth plu cadwynog chained feather stitches pwyth plu cadwynog chains cadwyn chair cadair chair back gorchudd cefn cadair chair backs gorchudd cefn cadair chair lift cadair godi chair lifts cadair godi chairbound pupil disgybl sy'n gaeth i'w gadair chairbound pupils disgybl sy'n gaeth i'w gadair chairman designate darpar gadeirydd chairman designates darpar gadeirydd chairs cadair chalaza calasa chalazas calasa chalcopyrite calcopyrit chalcopyrites calcopyrit chalet chalet chalets chalet chalice caregl chalices caregl chalk sialc chalk sialcio chalk drawing llun sialc chalk drawings llun sialc chalks sialc challenge her challenge herio challenger heriwr challengers heriwr challenges her challenging behaviour ymddygiad heriol challenging behaviours ymddygiad heriol chalumeau chalumeau chalumeaus chalumeau chamber agor (in quarry) chamber siambr (in general) chamber music cerddoriaeth siambr chamber musics cerddoriaeth siambr chamber of trade cymdeithas fasnach chamber tomb beddrod siambr chamber tombs beddrod siambr chamberlain siambrlen chamberlains siambrlen chambers agor (in quarry) chambers siambr (in general) chamfer siamffer chamfer siamffro chamfered siamffrog chamfered neck gwddf siamffrog chamfered necks gwddf siamffrog chamfers siamffer chamois siami chamois glove maneg siami chamois gloves maneg siami chamois leather lledr siami chamois leathers lledr siami champion pencampwr (male and general) champion pencampwraig (female) champion land tir agored champion lands tir agored champions pencampwr (male and general) champions pencampwraig (female) championship pencampwriaeth championships pencampwriaeth champlevé champlevé champlevés champlevé chance siawns chancel cangell chancel arch bwa cangell chancel arches bwa cangell chancellor canghellor chancellors canghellor chancels cangell chances siawns chandelier canhwyllyr chandeliers canhwyllyr chandler siandler chandlers siandler change newid change direction newid cyfeiriad change of engagement newid cyweddiad change of pace newid cyflymdra change one factor newid un ffactor change wheel olwyn newid change wheels olwyn newid changes newid changing face of the family wyneb newidiol y teulu changing notes nodau cyfnewid changing voice llais yn newid changing voices llais yn newid channel sianel channel sianelu channel efficiency effeithlonrwydd sianel channels sianel chanson chanson chansons chanson chant côr-gân (of canticle) chant llafarganu (formally) chant salm-dôn (of psalm) chant siant (=spoken singsong phrase) chant siantio (informally) chanting rhythmically llafarganu'n rhythmig chantry siantri chantry priest offeiriad siantri chantry priests offeiriad siantri chants côr-gân (of canticle) chants salm-dôn (of psalm) chants siant (=spoken singsong phrase) chaos anhrefn chaotic sky awyr afluniaidd chaparral mangoed chaparrals mangoed chapel capel chapel of ease capel anwes chapel without tower or spire capel heb dŵr na meindwr chapel without tower or spires capel heb dŵr na meindwr chapelry capeliaeth chapels capel chaplain caplan chaplaincy caplaniaeth chaplains caplan chaplet coronbleth chaplets coronbleth chapter cabidwl (=canons of a cathedral) chapter pennod (=division of a book) chapterhouse cabidyldy chapterhouses cabidyldy chapters cabidwl (=canons of a cathedral) chapters pennod (=division of a book) char torgoch character cymeriad (of person) character nod (=symbol) character nodwedd (of biological species etc) character code cod nodau character codes cod nodau character font ffont nodau character fonts ffont nodau character motivation and action cymhelliad a gweithred cymeriad character of a puppet cymeriad pyped character of vegetation nodwedd llystyfiant character recognition adnabod nodau character reference geirda cymeriad character references geirda cymeriad character set set nodau character sets set nodau character string llinyn nodau character strings llinyn nodau characteristic nodwedd (in general) characteristic nodweddiadol characteristic nodweddrif (logarithms) characteristic curve cromlin nodweddiadol characteristic curves cromlin nodweddiadol characteristic feature arwedd nodweddiadol characteristic features arwedd nodweddiadol characteristic note nodyn nodweddiadol characteristic notes nodyn nodweddiadol characteristics nodwedd (in general) characteristics nodweddrif (logarithms) characterization cymeriadaeth characterizations cymeriadaeth characters cymeriad (of person) characters nod (=symbol) characters nodwedd (of biological species etc) characters per second nodau yr eiliad (cps) charcoal siarcol charcoal drawing llun siarcol charcoal drawings llun siarcol charcoal pencil pensil siarcol charcoal pencils pensil siarcol charcoals siarcol charge codi tâl (money) charge cost (money) charge gwefr (electrical) charge gwefru (electrical) charge hyrddiad (in sport) charge hyrddio (in sport) charge llwytho (furnace or crucible) charge density meter mesurydd dwysedd gwefr charge density meters mesurydd dwysedd gwefr charge nurse prif weinydd nyrsio (=male sister) charge nurse prif weinyddes nyrsio (female) charge nurses prif weinydd nyrsio (=male sister) charge nurses prif weinyddes nyrsio (female) charged wedi'i gwefru (electrical, with feminine nouns) charged wedi'i wefru (electrical, with masculine nouns) charged condenser cynhwysydd wedi'i wefru charged condensers cynhwysydd wedi'i wefru charged particle gronyn wedi'i wefru charged particles gronyn wedi'i wefru charges cost (money) charges gwefr (electrical) charges hyrddiad (in sport) charging policy polisi codi tâl chariot cerbyd rhyfel chariot wheel pattern patrwm olwyn cerbyd chariot wheel patterns patrwm olwyn cerbyd chariots cerbyd rhyfel charismatic carismataidd charity elusen charity education addysg elusennol charity educations addysg elusennol charity school ysgol elusennol charity schools ysgol elusennol chars torgoch chart siart charter siarter charter of enfranchisement siarter rhyddfreinio charters siarter chartism siartaeth chartisms siartaeth chartist siartydd chartists siartydd charts siart chase helfa chase ymlid chaser siaswr chasers siaswr chases helfa chasing siasin chasing siasio chasing hammer morthwyl siasio chasing hammers morthwyl siasio chasings siasin chasm agendor chasms agendor chassis siasi chassis frame ffrâm siasi chassis frames ffrâm siasi chastity diweirdeb chasuble casul chasubles casul chatter sgrytiad chatter sgrytian chattermark rhewgraith chattermarks rhewgraith chatters sgrytiad chaudfroid chaudfroid chauvinism siofiniaeth chauvinisms siofiniaeth check gwiriad (=verification) check gwirio (=verify) check hollt (=split / defect in wood) check prawf (=test) check profi (=test) check siec (of pattern) check all gwirio oll check digit gwirio digid check digits gwirio digid check nut nyten gloi (lock nut) check nuts nyten gloi (lock nut) check pattern patrwm siec check patterns patrwm siec check pointer pwyntydd stac check pointers pwyntydd stac check selection gwirio dewisiad check-up archwiliad (medical) check-ups archwiliad (medical) checked material defnydd siec checked materials defnydd siec checklist rhestr gyfeirio (for reference) checklists rhestr gyfeirio (for reference) checkout desg talu checkouts desg talu checks gwiriad (=verification) checks hollt (=split / defect in wood) checks prawf (=test) checksum prawfswm checksums prawfswm cheek boch cheeks boch cheese caws cheese curd ceuled caws cheese curds ceuled caws cheese straws rhimynnau caws cheese-head bolt bollt bencosyn cheese-head bolts bollt bencosyn cheese-head rivet rhybed pencosyn cheese-head rivets rhybed pencosyn cheese-head screw sgriw bencosyn cheese-head screws sgriw bencosyn cheeseboard bwrdd caws cheeseboards bwrdd caws cheeseburger eidionyn caws cheeseburgers eidionyn caws cheesecake cacen gaws cheesecakes cacen gaws cheesecloth lliain caws cheesecloths lliain caws cheeses caws chef-d'oeuvre campwaith (masterpiece) chef-d'oeuvres campwaith (masterpiece) chelate celadu chelated celedig chelation celadiad chelations celadiad chemical cemegol chemical cemegyn chemical action effaith gemegol chemical actions effaith gemegol chemical behaviour ymddygiad cemegol chemical behaviours ymddygiad cemegol chemical industry diwydiant cemegion chemical kinetics cineteg gemegol chemical reaction adwaith cemegol chemical reactions adwaith cemegol chemical shift symudiad cemegol chemical shifts symudiad cemegol chemical stain staen cemegol chemical stains staen cemegol chemical structure adeiledd cemegol chemical structures adeiledd cemegol chemical symbol symbol cemegol chemical symbols symbol cemegol chemical weed killer chwynladdwr cemegol chemical weed killers chwynladdwr cemegol chemicals cemegyn chemisorption cemsugniad chemisorptions cemsugniad chemist cemegydd (=expert in chemistry) chemistry cemeg chemistry of food cemeg bwyd chemists cemegydd (=expert in chemistry) chemoreceptor cemodderbynnydd chemoreceptors cemodderbynnydd chemosensory cemosynhwyraidd chemosynthesis cemosynthesis chemotaxis cemotacsis chemotherapy cemotherapi chemotropism cemotropedd chemotropisms cemotropedd chenille needle nodwydd chenille chenille needles nodwydd chenille cheque siec chequer plate plât siecer chequer plates plât siecer chequered chain stitch pwyth cadwyn amryliw chequered chain stitches pwyth cadwyn amryliw cheques siec cherry ceiriosen chert cornfaen cherts cornfaen chessmen gwerin gwyddbwyll chest brest (of human) chest cist (for storing things) chest compression cywasgu'r frest chest freezer rhewgist chest freezers rhewgist chest medicine meddygaeth y frest chest medicines meddygaeth y frest chest of drawers cist o ddroriau chest of viols cist o feiolau chest pass pàs o'r frest chest register llais y frest chest registers llais y frest chestnut cneuen gastan chestnut brown cochddu (of soil) chestnut brown gwinau (enamelling colour) chestnut browns gwinau (enamelling colour) chestnuts cneuen gastan chests brest (of human) chests cist (for storing things) chevron cwplws (architecture) chevron banding bandin ceibr chevron bandings bandin ceibr chevron stitch pwyth ceibr chevron stitches pwyth ceibr chevrons cwplws (architecture) chiaroscuro chiaroscuro chiasma ciasma chiasmas ciasma chicanery twyll chicken cyw iâr chicken-pox brech yr ieir chicken-poxes brech yr ieir chickens cyw iâr chicory sicori chief education officer prif swyddog addysg chief education officers prif swyddog addysg chief executive officer prif weithredwr chief executive officers prif weithredwr chief superintendent prif arolygydd chief superintendents prif arolygydd chief-rent rhent arglwydd chief-rents rhent arglwydd chieftain pennaeth chieftains pennaeth chiffon shiffon chiffons shiffon child plentyn child abuse cam-drin plant child abuse register cofrestr plant a gamdriniwyd child abuse registers cofrestr plant a gamdriniwyd child allowance budd-dal plant child allowances budd-dal plant child assessment order gorchymyn asesu plentyn child assessment orders gorchymyn asesu plentyn child at risk plentyn mewn perygl child care gofal plant child care assistant cynorthwyydd gofal plant child care assistants cynorthwyydd gofal plant child care officer swyddog gofal plant child care officers swyddog gofal plant child care worker gweithiwr gofal plant child care workers gweithiwr gofal plant child cares gofal plant child development datblygiad plant child developments datblygiad plant child guidance cyfarwyddo plant child guidance centre canolfan cyfarwyddo plant child guidance centres canolfan cyfarwyddo plant child guidance clinic clinig cyfarwyddo plant child guidance clinics clinig cyfarwyddo plant child having special educational needs plentyn ag anghenion addysgol arbennig child in need plentyn mewn angen child minder gwarchodwr plant child minders gwarchodwr plant child protection diogelu plant child protection register cofrestr amddiffyn plant child protection registers cofrestr amddiffyn plant child psychiatrist seiciatrydd plant child psychiatrists seiciatrydd plant child psychiatry seiciatreg plant child psychology seicoleg plant child welfare lles plant child welfare clinic clinig lles plant child welfare clinics clinig lles plant child welfares lles plant child-centred approach dull plentyn ganolog child-centred approaches dull plentyn ganolog child-centred education addysg plant ganolog child-centred educations addysg plant ganolog child-centred teaching addysgu plant ganolog childbirth genedigaeth childbirths genedigaeth childhood plentyndod childhoods plentyndod childish plentynnaidd children's home cartref plant children's homes cartref plant children's literature llenyddiaeth plant children's literatures llenyddiaeth plant childs plentyn chill oeri chill bar bar rhynnu chill bars bar rhynnu chilli chilli chilling compartment adran oeri chilling compartments adran oeri chillis chilli chime clychsain chime bar bar cloch chime bars bar cloch chimes clychsain chimney simnai chin gên chin rest gên-bwys chin rests gên-bwys china tsieni china cabinet cabinet llestri china cabinets cabinet llestri china clay caolin china palette palet tsieni china palettes palet tsieni china ware llestri tsieni chinas tsieni chins gên chintz chintz chintzes chintz chip sglodi (in general) chip sglodyn (in general) chip tsip (in football) chip tsipio (in football) chip breaker torrwr sglodion chip breakers torrwr sglodion chip the ball tsipio'r bêl chipboard bwrdd sglodion chipboards bwrdd sglodion chipped tolciog (of surface) chipped grain graen sglodion chipped grains graen sglodion chipped potatoes sglodion chipping block bloc sglodi chipping blocks bloc sglodi chipping chisel cŷn sglodi chipping chisels cŷn sglodi chipping face wyneb sglodi chipping faces wyneb sglodi chipping hammer morthwyl sglodi chipping hammers morthwyl sglodi chipping resistance gwrthiant sglodi chipping resistances gwrthiant sglodi chips sglodyn (in general) chips tsip (in football) chiral cirol chirality ciroledd chiropodist ciropodydd chiropodists ciropodydd chiropody trin traed chisel cŷn chisel naddu chisel blade llafn cŷn chisel blades llafn cŷn chisel edge ymyl cŷn chisel edges ymyl cŷn chisel parts rhannau cŷn chisel shaped arrowhead pen saeth ffurf cŷn chisel shaped arrowheads pen saeth ffurf cŷn chisels cŷn chitin citin chitins citin chivalry sifalri chivalry order urdd sifalri chivalry orders urdd sifalri chives cennin syfi chlamydospore clamydosbor chlamydospores clamydosbor chloride clorid chloride ion ïon clorid chloride ions ïon clorid chloride shift symudiad clorid chloride shifts symudiad clorid chlorides clorid chlorinate clorineiddio chlorinated clorinedig chlorine clorin (Cl) chlorines clorin (Cl) chloroethane cloroethan chloroethanes cloroethan chloroform clorofform chloroforms clorofform chloromethane cloromethan chloromethanes cloromethan chlorophyll cloroffyl chlorophylls cloroffyl chloroplast cloroplast chloroplasts cloroplast chloropropane cloropropan chloropropanes cloropropan chlorosis clorosis (in botany) chlorosis gwyrddwst (medical) chockstone tagen chockstones tagen chocolate siocled chocolates siocled choice dewis choice chamber siambr ddewis choice chambers siambr ddewis choices dewis choir côr choir boy bachgen côr choir organ organ gôr choir organs organ gôr choir stall sedd gôr choir stalls sedd gôr choir-monk côr-fynach choir-monks côr-fynach choirs côr choke tagu choke tagydd chokes tagydd cholecalciferol colecalchifferol cholecalciferols colecalchifferol cholecystokinin colesystocinin cholecystokinins colesystocinin cholera colera cholera epidemic epidemig colera cholera epidemics epidemig colera choleras colera cholesterol colesterol cholesterols colesterol cholic acid asid colig cholic acids asid colig cholinergic colinergig cholinesterase colinesteras cholinesterases colinesteras cholosterolaemia colosterolaemia cholosterolaemias colosterolaemia chondral condrol chondroid condroid chondroitin condroitin chondroitins condroitin chop cildoriad (in tennis) chop cildorri (in tennis) chop golwyth (of meat) chop torri (mortise) chopper bwyell gig (meat) chopper grip gafael bwyell chopper grips gafael bwyell choppers bwyell gig (meat) chopping board bwrdd torri chopping boards bwrdd torri chops cildoriad (in tennis) chops golwyth (of meat) chorale corâl chorale prelude preliwd corâl chorale preludes preliwd corâl chorales corâl chord cord chord cordio chord figuring rhifoli cord chord in first inversion cord gwrthdro cyntaf chord in root position cord safle gwreiddiol chord in second inversion cord ail wrthdro chord in third inversion cord trydydd gwrthdro chord indication dynodi cord chord of the seventh cord seithfed chord progression dilyniad cordiau chord progressions dilyniad cordiau chord sequence dilyniant o gordiau chord sequences dilyniant o gordiau chordal block bloc cordiau chordal blocks bloc cordiau chordal structure adeiledd cordiol chordal structures adeiledd cordiol chordate cordat chordates cordat chords cord choreographer coreograffydd choreographers coreograffydd choreography coreograffi chorion corion chorions corion chorister aelod o gôr choristers aelod o gôr choroid coroid choroid layer haenen goroid choroid layers haenen goroid choroid plexus plecsws coroid choropleth coropleth choropleths coropleth chorus corws (in opera and secular music) chorus cytgan (=piece of music) chorus côr (=group of singers) chorus girl côr-ferch chorus girls côr-ferch chorus master côr-feistr chorus masters côr-feistr chosen physical activity gweithgaredd corfforol dewisol chrismation eneinio christening robe gŵn bedydd christening robes gŵn bedydd chromatic cromatig chromatic chord cord cromatig chromatic chords cord cromatig chromatic harp telyn gromatig chromatic harps telyn gromatig chromatic scale graddfa gromatig chromatic scales graddfa gromatig chromatic semitone hanner tôn cromatig chromatic semitones hanner tôn cromatig chromaticism cromatyddiaeth chromaticisms cromatyddiaeth chromatid cromatid chromatids cromatid chromatin cromatin chromatins cromatin chromatographic cromatograffig chromatography cromatograffaeth chrome crôm chrome green gwyrdd crôm chrome greens gwyrdd crôm chrome orange oren crôm chrome oranges oren crôm chromes crôm chromising cromeiddio chromium cromiwm (Cr) chromium screw sgriw gromiwm chromium screws sgriw gromiwm chromiums cromiwm (Cr) chromomer cromomer chromomers cromomer chromophore cromoffor chromophores cromoffor chromosomal cromosomaidd chromosome cromosom chromosome map map cromosomau (in biology) chromosome maps map cromosomau (in biology) chromosome number rhif cromosom chromosome numbers rhif cromosom chromosomes cromosom chromosphere cromosffer chromospheres cromosffer chronic cronig chronic confusional state cyflwr dryslyd cronig chronic confusional states cyflwr dryslyd cronig chronic illness gwaeledd cronig chronic pain poen cronig chronic pains poen cronig chronological cronolegol chronological age oed cronolegol chronological ages oed cronolegol chronological order trefn gronolegol chronological orders trefn gronolegol chronological understanding dealltwriaeth gronolegol chronological understandings dealltwriaeth gronolegol chronological writing ysgrifennu cronolegol chronology cronoleg chronometer coronomedr chronometers coronomedr chrysalis chwiler chuck crafanc chuck key allwedd grafanc chuck steak stêc balfais chuck steaks stêc balfais chucking crafangu chucking piece darn crafangu chucking pieces darn crafangu chucks crafanc church eglwys church cadence diweddeb amen church cadences diweddeb amen church committee pwyllgor eglwys church committees pwyllgor eglwys church embroidery brodwaith eglwysig church governor llywodraethwr eglwysig church governors llywodraethwr eglwysig church mode modd eglwysig church modes modd eglwysig church order trefn eglwys church orders trefn eglwys church with tower eglwys gyda thŵr churches eglwys churchwarden warden eglwys churchwardens warden eglwys churchyard mynwent eglwys churchyards mynwent eglwys churn buddai (to make butter) churn can llaeth (=can to hold milk) churns buddai (to make butter) churns can llaeth (=can to hold milk) chutney siytni chyle caul chyles caul chylomicron ceulomicron chylomicrons ceulomicron chyme treulfwyd chymes treulfwyd chymosin cymosin chymosins cymosin chymotrypsin cymotrypsin chymotrypsins cymotrypsin cichlid ciclid cichlids ciclid cider seidr ciders seidr ciliary ciliaraidd ciliary body corffyn ciliaraidd ciliary feeding ymborthi ciliaraidd ciliary muscle cyhyr ciliaraidd ciliary muscles cyhyr ciliaraidd ciliated epithelium epitheliwm ciliedig ciliated epitheliums epitheliwm ciliedig cilium ciliwm ciliums ciliwm cimbalom simbalom cimbaloms simbalom cinder cone côn lludw cinder cones côn lludw cinema auteur auteur sinema cinema auteurs auteur sinema cinnamon sinamon cinnamons sinamon cipher seiffr ciphers seiffr circadian rhythm rhythm circadaidd circadian rhythms rhythm circadaidd circle cylch circle cylchu circle chart siart cylch circle charts siart cylch circle formation trefniant cylch circle formations trefniant cylch circle of fifths cylch pumedau circles cylch circling cylchu (of foot, arms) circlip cylchglip circlips cylchglip circuit cylch rhedeg (=running track) circuit cylchdaith (of judge, preacher) circuit cylched (in electronics) circuit breaker torrwr cylched circuit breakers torrwr cylched circuit diagram diagram cylched circuit diagrams diagram cylched circuit judge barnwr cylchdaith circuit judges barnwr cylchdaith circuit response ymateb cylched circuit responses ymateb cylched circuit training hyfforddiant cylchol circuit trainings hyfforddiant cylchol circuit tuning cyweirio cylched circuit wave-forms tonffurfiau cylched circuits cylch rhedeg (=running track) circuits cylchdaith (of judge, preacher) circuits cylched (in electronics) circular crwn (=round) circular cylchlythyr (letter) circular cylchol (turning in circle) circular arch bwa crwn circular arches bwa crwn circular base gwaelod crwn circular bases gwaelod crwn circular buffer byffer cylchol circular buffers byffer cylchol circular cylinder silindr cylch circular cylinders silindr cylch circular dance dawns gylch circular dances dawns gylch circular die dei crwn circular dies dei crwn circular end pen crwn circular ends pen crwn circular flow of income llif cylchol incwm circular land glan gylchol (of reamer) circular lands glan gylchol (of reamer) circular lap seam sêm lap gylchol circular lap seams sêm lap gylchol circular list rhestr gylchol circular lists rhestr gylchol circular motion mudiant mewn cylch circular motion stitching pwytho cylchdro circular motions mudiant mewn cylch circular muscle cyhyryn crwn circular muscles cyhyryn crwn circular overfolded seam sêm orlap gylchol circular overfolded seams sêm orlap gylchol circular parry pario cylchol circular prism prism crwn circular prisms prism crwn circular pyramid pyramid crwn circular pyramids pyramid crwn circular saw llif gron circular saws llif gron circular shift syfliad cylchol circular shifts syfliad cylchol circular skirt sgert gylch circular skirts sgert gylch circular split die dei crwn hollt circular split dies dei crwn hollt circulars cylchlythyr (letter) circulate cylchredeg circulating cylchredol circulating capital cyfalaf cylchredol circulating capitals cyfalaf cylchredol circulating school ysgol gylchynol circulating schools ysgol gylchynol circulating waters dyfroedd cylchredol circulation cylchrediad circulations cylchrediad circulatory system system cylchrediad gwaed circulatory systems system cylchrediad gwaed circumcentre amganol circumcentres amganol circumcircle amgylch circumcircles amgylch circumcision enwaediad circumcisions enwaediad circumduction cylchddwytho circumference cylchedd (measurement) circumference cylchyn (line) circumferences cylchedd (measurement) circumferences cylchyn (line) circumflex acen grom circumflexes acen grom circumnavigate cylchfordeithio circumnavigation cylchfordaith circumnavigations cylchfordaith circumnavigator cylchforwr circumnavigators cylchforwr circumpolar constellation cytser ambegynol circumpolar constellations cytser ambegynol circumpolar star seren ambegynol circumpolar stars seren ambegynol circumscribe amgylchu circumscribed amgylchol circumscribed circle amgylch circumscribed circles amgylch circumscribed polygon polygon amgylchol circumscribed polygons polygon amgylchol circus syrcas cire perdue cwyr coll cire perdues cwyr coll cirque cwm cirques cwm cirrocumulus cirrocumulus cirrostratus cirrostratus cirrus cirrus cis cis cis-trans effect effaith trans-cis cis-trans effects effaith trans-cis cissoid cisoid cissoids cisoid cist cistfaen cistern seston cistern tower tŵr dyfrgist cistern towers tŵr dyfrgist cisterns seston cistron cistron cistrons cistron cists cistfaen citadel caer ddinesig citadels caer ddinesig citizen dinesydd citizens dinesydd citizenship dinasyddiaeth citizenships dinasyddiaeth citric acid asid citrig citric acids asid citrig citrulline citrwlin citrullines citrwlin citrus citrws citrus fruit ffrwyth citrws citrus fruits ffrwyth citrws cittern sitern citterns sitern city dinas city blues melan y ddinas city centre canol y ddinas city centres canol y ddinas city region rhanbarth dinas city regions rhanbarth dinas city state gwladwriaeth ddinas city states gwladwriaeth ddinas civic dinesig civic mathematics mathemateg ddinesig civic sense synnwyr dinesig civic senses synnwyr dinesig civil moesgar (=polite) civil sifil (of citizens) civil constitution cyfansoddiad sifil civil constitutions cyfansoddiad sifil civil defence amddiffyn sifil civil defences amddiffyn sifil civil disobedience anufudd-dod sifil civil disobediences anufudd-dod sifil civil engineering peirianneg sifil civil engineerings peirianneg sifil civil jurisdiction awdurdodaeth sifil civil jurisdictions awdurdodaeth sifil civil list rhestr sifil civil lists rhestr sifil civil proceedings achos sifil civil rights iawnderau sifil civil service gwasanaeth sifil civil services gwasanaeth sifil civil settlement anheddiad sifil civil settlements anheddiad sifil civil war rhyfel cartref civil wars rhyfel cartref civilian sifiliad civilians sifiliad civility gwarineb civilization gwareiddiad civilizations gwareiddiad civilized society cymdeithas wâr cladding cladin claddings cladin claim hawl claim hawlio claims hawl clamp clamp clamp clampio clamping device dyfais glampio clamping devices dyfais glampio clamping screw sgriw glampio clamping screws sgriw glampio clamps clamp clan clan clans clan clap clap clap clapio clap a steady beat clapio curiad cyson clap hands curo dwylo clap partner's hands curo dwylo partner clapper box blwch clepian clapper boxes blwch clepian claps clap clarified fat saim gloyw clarified fats saim gloyw clarify gloywi (in cooking) clarinet clarinét clarinets clarinét clarinettist clarinetydd clarinettists clarinetydd clarity eglurder clarity of body shape eglurder siâp y corff clarity of the notation eglurder y nodiant clarsach clarsach clarsaches clarsach clash gwrthdaro clasp clesbyn clasp nail hoelen lorio clasp nails hoelen lorio clasper clasper claspers clasper clasps clesbyn class dosbarth class distinction gwahaniaeth dosbarth class distinctions gwahaniaeth dosbarth class interval cyfwng dosbarth class intervals cyfwng dosbarth class management rheolaeth dosbarth class managements rheolaeth dosbarth class mark marc dosbarth class marks marc dosbarth class separation gwahaniad dosbarth class separations gwahaniad dosbarth class structure fframwaith dosbarth class structures fframwaith dosbarth class struggle rhyfel dosbarth class struggles rhyfel dosbarth classes of food mathau o fwyd classic pass pàs glasurol classic profile proffil clasurol classic profiles proffil clasurol classic style arddull clasurol classic styles arddull clasurol classical clasurol classical curriculum cwricwlwm clasurol classical curriculums cwricwlwm clasurol classical music cerddoriaeth glasurol classical musics cerddoriaeth glasurol classical studies astudiaethau clasurol classicism clasuriaeth classicisms clasuriaeth classicist clasurwr classicists clasurwr classics clasuron classification dosbarthiad classification system trefn ddosbarthu classification systems trefn ddosbarthu classifications dosbarthiad classify dosbarthu classify information dosbarthu gwybodaeth classroom ystafell ddosbarth classroom behaviour ymddygiad yn yr ystafell ddosbarth classroom behaviours ymddygiad yn yr ystafell ddosbarth classroom climate naws yr ystafell ddosbarth classroom climates naws yr ystafell ddosbarth classroom ensemble ensemble dosbarth classroom ensembles ensemble dosbarth classroom environment amgylchedd yr ystafell ddosbarth classroom environments amgylchedd yr ystafell ddosbarth classroom feedback adborth o'r ystafell ddosbarth classroom feedbacks adborth o'r ystafell ddosbarth classroom observation arsylwi yn yr ystafell ddosbarth classroom-based activities gweithgareddau ystafell ddosbarth classroom-based task tasg ystafell ddosbarth classroom-based tasks tasg ystafell ddosbarth classrooms ystafell ddosbarth clastic clastig clathrate cawellog clathrate clathrad clathrates clathrad clause cymal clauses cymal claustral clwystrol clausula diweddeb clausulas diweddeb clavecin clafesin claveciniste chwaraewr clafesin clavecinistes chwaraewr clafesin clavecins clafesin claves clafiau clavichord claficord clavichords claficord clavicle pont yr ysgwydd clavicles pont yr ysgwydd clavicymbal clafisymbal clavicymbals clafisymbal clavier llawfwrdd (keyboard) clavier offeryn llawfwrdd (instrument) claviers llawfwrdd (keyboard) claviers offeryn llawfwrdd (instrument) claw crafanc claw clutch cydiwr crafanc claw clutches cydiwr crafanc claw foot troed crafanc claw foots troed crafanc claw hammer morthwyl crafanc claw hammers morthwyl crafanc claw wrench tyndro crafanc claw wrenches tyndro crafanc claws crafanc clay clai clay bin bin clai clay bins bin clai clay cutter torrell glai clay cutters torrell glai clay modelling modelu â chlai clay modelling tool erfyn modelu clai clay modelling tools erfyn modelu clai clay relief cerfwedd glai clay reliefs cerfwedd glai clay tools offer clai clay vale dyffryndir clai clay vales dyffryndir clai clay with flints clai â challestr clean glân clean cut toriad glân clean cuts toriad glân clean hole twll glân clean holes twll glân clean mould mowld glân clean moulds mowld glân clean thread edau lân clean threads edau lân cleaner defnydd glanhau (of material) cleaner glanhawr (male and general) cleaner glanhawraig (female) cleaners defnydd glanhau (of material) cleaners glanhawr (male and general) cleaners glanhawraig (female) cleaning appliance dyfais lanhau cleaning appliances dyfais lanhau cleaning fluid hylif glanhau cleaning fluids hylif glanhau cleanliness glendid cleanse glanhau cleanser glanweithydd cleansers glanweithydd cleansing department adran lanweithio cleansing departments adran lanweithio cleansing lotion trwyth glanhau cleansing lotions trwyth glanhau clear clir (=transparent and most other senses) clear clirio clear eglur (=not confused) clear pendant (=distinct) clear beginning dechrau pendant clear beginnings dechrau pendant clear end diwedd pendant clear ends diwedd pendant clear finish gorffeniad clir clear finishs gorffeniad clir clear flute ffliwt glir clear flutes ffliwt glir clear glaze gwydredd gloyw clear glazes gwydredd gloyw clear lacquer lacr clir clear lacquers lacr clir clear lamp lamp glir clear lamps lamp glir clear middle canol pendant clear middles canol pendant clear plastic plastig clir clear plastics plastig clir clear polish llathrydd clir clear polishs llathrydd clir clear set of values set eglur o werthoedd clear sketch braslun eglur clear sketches braslun eglur clear varnish farnais clir clear varnishs farnais clir clearance cliriad clearance angle ongl gliriad clearance angles ongl gliriad clearance drill dril cliriad clearance drills dril cliriad clearance hole twll cliriad clearance holes twll cliriad clearances cliriad clearing gloywi (in histology) clearing llannerch clearing agent gloywydd clearing agents gloywydd clearing bank banc clirio clearing banks banc clirio clearings llannerch clearway clirffordd cleat cledd cleat cleddu cleats cledd cleavage holltiad (in chemistry) cleavage ymraniad (in biology) cleavage plane plân hollti cleavage planes plân hollti cleavages holltiad (in chemistry) cleavages ymraniad (in biology) clef cleff clefs cleff cleft hollt clefts hollt clench clensio (a nail, a rivet) clerestory llofft olau clergyman clerigwr clergymans clerigwr cleric clerigwr clerical clerigol clericalism clerigiaeth clericalisms clerigiaeth clerics clerigwr clerk clerc clerk of the course clerc y maes clerks clerc clerks regular clerigwyr rheolaidd clevis pin pìn clefis clevis pins pìn clefis click clicio client cleient client confidentiality cyfrinachedd cleient client dignity urddas y cleient client diversity amrywiaeth o gleientiaid client group grŵp o gleientiaid client groups grŵp o gleientiaid client state gwladwriaeth ddibynnol client states gwladwriaeth ddibynnol client-centred cleient ganolog client-directed approach dull wedi'i gyfeirio at y cleient client-directed approaches dull wedi'i gyfeirio at y cleient clientage cleientaeth clientages cleientaeth clients cleient cliff clogwyn cliff collapse clogwyn yn syrthio cliff collapses clogwyn yn syrthio cliff line llinell glogwyn cliff lines llinell glogwyn cliff recession enciliad clogwyn cliff recessions enciliad clogwyn cliffs clogwyn climate hinsawdd climate barrier gwahanfur rhag yr hinsawdd climate barriers gwahanfur rhag yr hinsawdd climates hinsawdd climatic conditions hinsawdd climatic extremes eithafion hinsawdd climatic feature nodwedd hinsoddol climatic features nodwedd hinsoddol climatic region rhanbarth hinsoddol climatic regions rhanbarth hinsoddol climatology hinsoddeg climax uchafbwynt climax vegetation uchafbwynt llystyfiant climax vegetations uchafbwynt llystyfiant climaxes uchafbwynt climb dringo climb high dringo'n uchel climb milling melino dringol (down cut) climb millings melino dringol (down cut) climbing feed porthiant dringol climbing feeds porthiant dringol climbing frame ffrâm ddringo climbing frames ffrâm ddringo climbing plant planhigyn dringo climbing plants planhigyn dringo climbing rope rhaff ddringo climbing ropes rhaff ddringo climbing wall wal ddringo climbing walls wal ddringo clinch a deal taro bargen cling film haenen lynu cling films haenen lynu clinic clinig clinical clinigol clinical assessment asesiad clinigol clinical assessments asesiad clinigol clinical audit archwiliad clinigol clinical audits archwiliad clinigol clinical psychologist seicolegydd clinigol clinical psychologists seicolegydd clinigol clinical psychology seicoleg glinigol clinical study astudiaeth glinigol clinical thermometer thermomedr clinigol clinical thermometers thermomedr clinigol clinical training hyfforddiant clinigol clinical trainings hyfforddiant clinigol clinically clean clinigol lân clinics clinig clinker clincer clinker eight clincer wyth clinker eights clincer wyth clinker four clincer pedwar clinker fours clincer pedwar clinker nailed boots esgidiau hoelion clincer clinkers clincer clinometer clinomedr clinometers clinomedr clint clint clints clint clip clip clip clipio clip art library llyfrgell glipluniau clipboard clipfwrdd clipboards clipfwrdd clipping distortion afluniad clipio clipping distortions afluniad clipio clips clip clitellum clitelwm clitellums clitelwm cloaca cloaca cloacas cloaca cloak clogyn cloaks clogyn clock cloc clock arithmetic rhifyddeg cloc clock arithmetics rhifyddeg cloc clock glass gwydryn cloc clock pulse curiad cloc clock pulse generator generadur curiadau cloc clock pulse generators generadur curiadau cloc clock pulses curiad cloc clock rate cyfradd cloc clock rates cyfradd cloc clock signal signal cloc clock signals signal cloc clocks cloc clockwise clocwedd clockwise consecutive revolutions cylchdroeon clocwedd olynol clockwise direction cyfeiriad clocwedd clockwise directions cyfeiriad clocwedd clockwise moment moment clocwedd clockwise moments moment clocwedd clog tagu (=choke) clog dance dawns y glocsen clog dances dawns y glocsen clog rattle rhuglen glocsen clog rattles rhuglen glocsen clogged surface arwyneb wedi tagu clogged surfaces arwyneb wedi tagu cloisonné enamel enamel cloisonné cloisonné enamels enamel cloisonné cloister clwysty cloistered clwystredig cloisters clwysty clone clonio clone clôn clones clôn close agos close cau close diweddeb (in music) close combat gornest glòs close combats gornest glòs close grain graen clòs close grains graen clòs close harmony harmoni clòs close packing pacio'n dynn close the key cau'r agoriad (of a switch) close the switch cau'r switsh close the tap cau'r tap close woven fabric ffabrig gwead clos close woven fabrics ffabrig gwead clos close-mouth tongs gefel gegdyn close-packing pacio tyn close-up agoslun (diagram) close-ups agoslun (diagram) closed ar gau (shop sign etc) closed caeedig closed circuit cylched gaeedig closed circuit television teledu cylch-caeedig (CCTV) closed circuit televisions teledu cylch-caeedig (CCTV) closed circuits cylched gaeedig closed circulation cylchrediad caeedig closed circulations cylchrediad caeedig closed eaves bondo caeedig closed fracture torasgwrn caeedig closed fractures torasgwrn caeedig closed interval cyfwng caeedig closed intervals cyfwng caeedig closed loop dolen gaeedig closed loops dolen gaeedig closed pack pecyn caeedig closed packs pecyn caeedig closed pipe pibell gaeedig closed pipes pibell gaeedig closed question cwestiwn caeedig closed questions cwestiwn caeedig closed shop siop gaeedig closed shops siop gaeedig closed stance safiad caeedig closed stances safiad caeedig closed system cyfundrefn gaeedig closed systems cyfundrefn gaeedig closes diweddeb (in music) closest approach nesâd agosaf closest approaches nesâd agosaf closing balance balans terfynol closing balances balans terfynol closing stile cledren gau closing stiles cledren gau closing stock stoc derfynol closing stocks stoc derfynol closure caefa closures caefa clot ceulo clot tolchen cloth brethyn (of heavy material) cloth clwt (for wiping etc) cloth lliain (of light material) cloth body corff lliain cloth patch clwt brethyn cloth patches clwt brethyn cloth trade masnach frethyn cloth trades masnach frethyn clothes dillad clothes basket basged ddillad clothes baskets basged ddillad clothes hanger cambren dillad clothes hangers cambren dillad clothes horse hors ddillad clothes horses hors ddillad clothes line lein ddillad clothes lines lein ddillad clothes peg peg dillad clothes pegs peg dillad clothes rack rhesel ddillad clothes racks rhesel ddillad clothier brethynnwr clothiers brethynnwr cloths brethyn (of heavy material) cloths clwt (for wiping etc) cloths lliain (of light material) clots tolchen clotted cream hufen tolch clotted creams hufen tolch cloud cwmwl cloud base gwaelod cwmwl cloud bases gwaelod cwmwl cloud chamber llestr niwl cloud chambers llestr niwl cloud cover gorchudd cwmwl cloud covers gorchudd cwmwl cloudburst torgwmwl cloudbursts torgwmwl cloudiness cymyledd cloudlet cymylyn cloudlets cymylyn clouds cwmwl clout nail hoelen benfawr clout nails hoelen benfawr clove clof clove hitch cwlwm glyn clove hitches cwlwm glyn clover meillionen clover leaf junction cyffordd dail meillion clover leaf junctions cyffordd dail meillion clovers meillionen cloves clof clown clown clowns clown cloze exercise ymarfer llenwi bylchau cloze exercises ymarfer llenwi bylchau cloze procedure dull cyfannu cloze procedures dull cyfannu club clwb club foot troed glwb club foots troed glwb club-moss clwbfwsogl clubhouse tŷ clwb clubhouses tŷ clwb clubs clwb clumsiness lletchwithdod clumsy child syndrome syndrom plentyn afrosgo clumsy child syndromes syndrom plentyn afrosgo cluster clwstwr cluster clystyru clusters clwstwr clutch cydiwr clutch gafael clutch lever lifer cydiwr clutch levers lifer cydiwr clutch plate plât cydio clutch plates plât cydio clutches cydiwr co-dominance cyd-drechedd co-dominances cyd-drechedd co-dominant cyd-drechol co-dominant cyd-drechydd co-dominants cyd-drechydd co-education cydaddysg co-educational scheme cynllun cydaddysgol co-educational schemes cynllun cydaddysgol co-educational school ysgol gydaddysgol co-educational schools ysgol gydaddysgol co-educations cydaddysg co-enzyme cydensym co-enzymes cydensym co-ionic coïonig co-latitude cyfledred co-latitudes cyfledred co-operative bank banc cydweithredol co-operative banks banc cydweithredol co-operative business busnes cydweithredol co-operative play chwarae cydweithredol co-operative shop siop gydweithredol co-operative shops siop gydweithredol co-operative society cymdeithas gydweithredol co-operative teaching addysgu cydweithredol co-opt cyfethol co-opted member aelod cyfetholedig co-opted members aelod cyfetholedig co-reactive cydadweithiol co-respondent cydatebydd co-respondents cydatebydd co-tidal line llinell gyflanw co-tidal lines llinell gyflanw coacervate coaserfad coacervates coaserfad coacervation coaserfadiad coacervations coaserfadiad coach bws moethus (=bus) coach hyfforddi coach hyfforddwr (=trainer, male and general) coach hyfforddwraig (=trainer, female) coach bolt bollt goets coach bolts bollt goets coach horn corn cerbyd coach horns corn cerbyd coach screw sgriw goets coach screws sgriw goets coaches bws moethus (=bus) coaches hyfforddwr (=trainer, male and general) coaches hyfforddwraig (=trainer, female) coaching hyfforddiant coachings hyfforddiant coagulate ceulo (in general) coagulate clystyru (in chemistry) coagulate tolchennu (of blood) coagulated ceuledig coagulation ceulad (in general) coagulation tolcheniad (of blood) coagulations ceulad (in general) coagulations tolcheniad (of blood) coal glo coal industry diwydiant glo coal measures cystradau glo coal tar col-tar coal tar coltario coal tar dye llifyn col-tar coal tar dyes llifyn col-tar coal tars col-tar coal-bearing rocks creigiau â glo coalesce cyfuno coalescence cyfuniad coalescences cyfuniad coalfield maes glo coalfields maes glo coalfish chwitlyn glas coalfishs chwitlyn glas coalition clymblaid coalitions clymblaid coals glo coaming ymyled coamings ymyled coarse bras (=large grained) coarse garw (=rough textured) coarse adjustment cymhwysiad bras coarse adjustments cymhwysiad bras coarse control rheolydd bras coarse controls rheolydd bras coarse feed porthiant garw coarse feeds porthiant garw coarse grain graen bras coarse grains graen bras coarse grit grit bras coarse grits grit bras coarse knurl nwrl bras coarse knurls nwrl bras coarse oilstone carreg hogi gradd arw coarse oilstones carreg hogi gradd arw coarse pitch pitsh bras coarse pitches pitsh bras coarse surface arwyneb bras coarse surfaces arwyneb bras coarse texture gwead bras coarse textures gwead bras coarse thread edau fras coarse threads edau fras coarseness garwedd coast arfordir coast of emergence arfordir cyfodol coastal arfordirol coastal current cerrynt arfordirol coastal currents cerrynt arfordirol coastal feature arwedd arfordirol coastal features arwedd arfordirol coastal flooding llifogydd arfordirol coastal landform tirffurf arfordirol coastal landforms tirffurf arfordirol coastal marsh morfa coastal marshs morfa coastal plain gwastadedd arfordirol coastal plains gwastadedd arfordirol coastguard gwyliwr y glannau coastguards gwyliwr y glannau coasting cowstio coastline morlin coastlines morlin coasts arfordir coat araen (in metalwork, plastics) coat araenu (in metalwork, plastics) coat caen (in cooking) coat caenu (in cooking) coat cot (of clothing, paint) coat of arms arfbais coat weight pwysau cot coat-dress cot ffrog coating batter cytew caenu coating batters cytew caenu coats araen (in metalwork, plastics) coats caen (in cooking) coats cot (of clothing, paint) coaxial cyfechelog coaxial cable cebl cyfechelog coaxial cables cebl cyfechelog coaxial circles cylchoedd cyfechelin cobalt cobalt (Co) cobalt green gwyrdd cobalt cobalt greens gwyrdd cobalt cobalt violet fioled cobalt cobalt violets fioled cobalt cobalts cobalt (Co) cobble cobl cobbles cobl cobra bit ebill cobra cobra bits ebill cobra coccidiosis cocsidiosis coccus cocws coccyx asgwrn cynffon coccyxes asgwrn cynffon cochlea cochlea cochlear canal tiwb y cochlea cochlear canals tiwb y cochlea cochleas cochlea cockfeather pluen geiliog cockfeathers pluen geiliog cockle cocosen cockles cocosen cockpit talwrn cockpits talwrn cocktail coctel cocktail stick pren coctel cocktail sticks pren coctel cocktails coctel cocoa coco cocoas coco coconut cneuen goco coconuts cneuen goco cocoon cocŵn cocoons cocŵn cocotte cocotte cocottes cocotte cod penfras cod steak stecen benfras cod steaks stecen benfras coda coda codas coda code cod code codio code figure rhif cod code figures rhif cod code generation cynhyrchu cod code of behaviour cod ymddygiad code of conduct cod ymddygiad code of good practice cod ymarfer da code of practice cod ymarfer coder codydd coders codydd codes cod codetta codeta codettas codeta codex codecs codexes codecs codification codeiddiad codifications codeiddiad codifier codeiddiwr codifiers codeiddiwr codify codeiddio coding codio coding sheet taflen godio coding sheets taflen godio coefficient cyfernod coefficient of expansion cyfernod ehangiad coefficient of friction cyfernod ffrithiant coefficient of linear expansion cyfernod ehangiad llinol coefficient of regression cyfernod atchwel coefficient of resistance cyfernod gwrthiant coefficient of restitution cyfernod adfer coefficient of variation cyfernod amrywiad coefficients cyfernod coeliac coeliag coelom coelom coeloms coelom coenobites coenobia coerce gorfodi coercion gorfodaeth coercions gorfodaeth coffee coffi coffee beans ffa coffi coffee break amser paned coffee breaks amser paned coffee maker peiriant coffi coffee makers peiriant coffi coffee table bwrdd coffi coffee tables bwrdd coffi coffees coffi coffer coffr coffers coffr cog cocsen cogged danheddog cogged joint uniad cocsen cogged joints uniad cocsen cogging cogyddio (using fullers) cognition gwybyddiaeth cognitions gwybyddiaeth cognitive gwybyddol cognitive ability gallu gwybyddol cognitive behaviour therapy therapi ymddygiad gwybyddol cognitive competence cymhwysedd gwybyddol cognitive competences cymhwysedd gwybyddol cognitive deficit diffyg gwybyddol cognitive deficits diffyg gwybyddol cognitive development datblygiad gwybyddol cognitive developments datblygiad gwybyddol cognitive disorder anhwylder gwybyddol cognitive disorders anhwylder gwybyddol cognitive disturbance tarfiad gwybyddol cognitive disturbances tarfiad gwybyddol cognitive domain maes gwybyddol cognitive domains maes gwybyddol cognitive learning dysgu gwybyddol cognitive meaning ystyr gwybyddol cognitive meanings ystyr gwybyddol cognitive objective amcan gwybyddol cognitive objectives amcan gwybyddol cognitive process proses wybyddol cognitive psychology seicoleg wybyddol cognitive restructuring ailstrwythuro gwybyddol cognitive test prawf gwybyddol cognitive tests prawf gwybyddol cognizance of pleas hawl pledio cogwheel olwyn gocos cogwheels olwyn gocos coherence cydlyniad coherences cydlyniad coherent cydlynol (of whole, of parts) coherent dealladwy (of language) coherent rhesymegol (of argument etc) coherent trefnus (of person) cohesion cydlyniad cohesions cydlyniad cohesive cydlynol cohesiveness cydlynrwydd cohort carfan (=people treated as a group) cohort mintai (Roman military usage) cohorts carfan (=people treated as a group) cohorts mintai (Roman military usage) coil coil (in electronics) coil torch (of rope, hair, clay) coil ignition taniad coil coil ignitions taniad coil coil spring sbring coil coil springs sbring coil coiled torchog coiling torchi (pottery) coils coil (in electronics) coils torch (of rope, hair, clay) coin darn arian coin hoard celc arian bath coin hoards celc arian bath coinage arian bath coinages arian bath coincide cyd-daro coincident cyd-drawol coins darn arian coke golosg coke fuel tanwydd golosg coke fuels tanwydd golosg coke oven batteries cyfres ffyrnau golosg cokes golosg coking coal glo golosg coking coals glo golosg col col col legno col legno colander colandr colanders colandr cold annwyd (=common cold) cold oer cold oerni cold chisel cŷn caled cold chisels cŷn caled cold colour lliw oer cold colours lliw oer cold drawn wedi'i dynnu'n oer (with masculine nouns) cold drawn wedi'i thynnu'n oer (with feminine nouns) cold front ffrynt oer cold fronts ffrynt oer cold glue glud oer cold glues glud oer cold restart ailgychwyniad oer cold restarts ailgychwyniad oer cold riveting rhybedu oer cold set set oer cold sets set oer cold shortness oer freuder cold soldering sodro oer cold strip mill melin strip oer cold strip mills melin strip oer cold sweet pwdin oer cold sweets pwdin oer cold war rhyfel oer cold wars rhyfel oer cold water dye llifyn dŵr oer cold water dyes llifyn dŵr oer cold water glue glud dŵr oer cold water glues glud dŵr oer cold water paste past dŵr oer cold water pastes past dŵr oer cold water starch startsh dŵr oer cold water starches startsh dŵr oer cold welding weldio oer cold wind rhewynt cold winds rhewynt cold working of materials gweithio defnyddiau'n oer cold-forming ffurfio'n oer colds annwyd (=common cold) colds oerni coleoptile coleoptil coleoptiles coleoptil coleorhiza coleorhisa coleorhizas coleorhisa coleslaw coleslaw coleslaws coleslaw coley celog colic colig colics colig colitic colitig collaborator cydweithredwr collaborators cydweithredwr collage collage collagen colagen collagens colagen collages collage collapse cwymp collapse cwympo collapse the scrum cwympo'r sgrym collapses cwymp collar coler collar hammer morthwyl coleru collar hammers morthwyl coleru collar with band coler â band collarbone pont yr ysgwydd collarbones pont yr ysgwydd collared urn wrn colerog collared urns wrn colerog collaring coleru collars coler collate coladu collateral bundle sypyn cyfraidd collateral bundles sypyn cyfraidd collation coladiad collations coladiad collator coladydd collators coladydd collect casglu collect information casglu gwybodaeth collect the ball casglu'r bêl collection casgliad collections casgliad collective bargaining cydfargeinio collective farm fferm gyfunol collective farms fferm gyfunol collective worship addoli ar y cyd collectivism cyfunoliaeth collectivisms cyfunoliaeth collectivization cyfunoliad collectivizations cyfunoliad collector current cerrynt y casglydd collector currents cerrynt y casglydd college coleg college board bwrdd coleg college boards bwrdd coleg college of education coleg addysg college of further education coleg addysg bellach college of higher education coleg addysg uwch colleges coleg collegiate church eglwys golegaidd collegiate churches eglwys golegaidd collegiate university prifysgol golegol collenchyma colencyma collenchymas colencyma collet colet collet chuck crafanc colet collet chucks crafanc colet collet hammer morthwyl colet collet hammers morthwyl colet collets colet collide gwrthdaro collider gwrthdrawydd colliders gwrthdrawydd colliery pwll glo colligate cydglymu colligative property priodwedd gydglymu collimator cyflinydd collimators cyflinydd collinear unllin collinearity unllinedd collineation unlliniad collineations unlliniad collision gwrthdrawiad collisionless model model anwrthdrawol collisionless models model anwrthdrawol collisions gwrthdrawiad colloid coloid colloidal coloidaidd colloidal solution hydoddiant coloidaidd colloidal solutions hydoddiant coloidaidd colloids coloid colloquy cynulliad collusion cydgynllwynio colluvial casglifol colluvium casglifiad colluviums casglifiad cologarithm cyflogarithm cologarithms cyflogarithm colon colon colonel cyrnol colonels cyrnol colonial trefedigaethol colonial history hanes y trefedigaethau colonial preference blaenoriaeth i'r trefedigaethau colonial preferences blaenoriaeth i'r trefedigaethau colonization gwladychiad colonizations gwladychiad colonize cytrefu (in biology) colonize trefedigaethu (in history) colons colon colony cytref (in biology) colony trefedigaeth (in history) coloratura coloratwra coloratura soprano soprano goloratwra colorimeter colorimedr colorimeters colorimedr colostomy colostomi colostrum colostrwm colostrums colostrwm colour lliw colour lliwio colour additive ychwanegyn lliw colour additives ychwanegyn lliw colour bar gwaharddiad lliw (in apartheid) colour bars gwaharddiad lliw (in apartheid) colour blind dall i liwiau colour blindness dallineb lliw colour block bloc lliw colour blocks bloc lliw colour box blwch lliw colour boxes blwch lliw colour cake teisen liw colour cakes teisen liw colour chart siart lliwiau colour charts siart lliwiau colour coding cod lliwiau colour codings cod lliwiau colour combinations cyfuniadau o liwiau colour filter hidlydd lliw colour filters hidlydd lliw colour medium cyfrwng lliw colour mediums cyfrwng lliw colour mixing cymysgu lliwiau colour pencil pensil lliw colour pencils pensil lliw colour perspective persbectif lliw colour perspectives persbectif lliw colour print print lliw colour prints print lliw colour range amrediad lliw colour ranges amrediad lliw colour rendering rendro lliw colour scheme cynllun lliw colour schemes cynllun lliw colour stick ffon lliw colour sticks ffon lliw colour tooling leaf dalen offeru lliw colour tooling leafs dalen offeru lliw colour vision golwg lliw colour visions golwg lliw colourant lliwydd colourants lliwydd colouration lliwiad colourations lliwiad coloured bead glain lliw coloured beads glain lliw coloured card cerdyn lliw coloured cardboard cardbord lliw coloured cardboards cardbord lliw coloured cards cerdyn lliw coloured cartridge paper papur cetris lliw coloured cartridge papers papur cetris lliw coloured cellophane seloffan lliw coloured cellophanes seloffan lliw coloured cement sment lliw coloured cements sment lliw coloured chalk sialc lliw coloured chalks sialc lliw coloured drawing ink inc lluniadu lliw coloured drawing inks inc lluniadu lliw coloured eyelet llygaden liw coloured eyelets llygaden liw coloured felt ffelt lliw coloured felts ffelt lliw coloured glass gwydr lliw coloured glassware llestri gwydr lliw coloured lace carrai liw coloured laces carrai liw coloured paper papur lliw coloured papers papur lliw coloured perspex persbecs lliw coloured perspexes persbecs lliw coloured plasticine plastisin lliw coloured plasticines plastisin lliw coloured starch startsh lliw coloured starches startsh lliw coloured tissue paper papur sidan lliw coloured tissue papers papur sidan lliw colourfast dye llifyn anniflan colourfast dyes llifyn anniflan colouring lliwio (in finishing metal) colouring agent cyfrwng lliwio colouring agents cyfrwng lliwio colourless di-liw colours lliw column colofn column break toriad colofn column breaks toriad colofn column graph graff colofn column graphs graff colofn column matrix matrics colofn column matrixes matrics colofn column of threes colofn drioedd (Llanofer) column vector fector colofn column vectors fector colofn columnar epithelium epitheliwm colofnog columnar epitheliums epitheliwm colofnog columns colofn comb crib comb cribo comb joint uniad crib comb joints uniad crib comb of harp crib telyn combat gornest combats gornest combination cyfuniad combination cyfunol combination callipers caliperau cyfunol combination chuck crafanc gyfunol combination chucks crafanc gyfunol combination drill dril canoli cyfunol combination drills dril canoli cyfunol combination easel îsl cyfunol combination easels îsl cyfunol combination hinge colfach cyfunol combination hinges colfach cyfunol combination of the two cyfuniad o'r ddau combination of units cyfuniad o unedau combination oilstone carreg hogi ddwbl combination oilstones carreg hogi ddwbl combination pedal pedal cyfuno combination pedals pedal cyfuno combination piston piston cyfuno combination pistons piston cyfuno combination plane plaen amlddefnydd combination planes plaen amlddefnydd combination pliers gefelen gyfunol combination punches cyfuniad dyrnodau combination set set gyfunol combination sets set gyfunol combination square sgwâr cyfunol combination squares sgwâr cyfunol combination stop stop cyfuno combination stops stop cyfuno combination tone cyfunsain combination tones cyfunsain combinations cyfuniad combinatorial cyfuniadol combine cyfuno combine harvester dyrnwr medi combine harvesters dyrnwr medi combined cyfunol combined carbon carbon cyfunol combined carbons carbon cyfunol combined gate knife and heart trowel cyllell gât a thrywel calon cyfunol combined rivet set and snap set a snap rhybed cyfunol combined subject syllabus maes llafur pwnc cyfun combined vaults llofneidiau cysylltiol combining text cyfuno testun combs crib combustible hylosg combustion hylosgiad (in chemistry) combustion taniad (in general) combustions hylosgiad (in chemistry) combustions taniad (in general) come to rest dod i aros comet comed comets comed comfort cysur comfort cysuro comfort conditions amodau cysur comfort survey arolwg cyfforddusrwydd comfortable cyffyrddus comforts cysur comic atmosphere awyrgylch comig comic atmospheres awyrgylch comig comic character cymeriad comig comic characters cymeriad comig comic opera opera gomig comic operas opera gomig comma coma command gorchymyn command code cod gorchymyn command codes cod gorchymyn command word gair gorchymyn command words gair gorchymyn command-response method dull gorchymyn ac ymateb command-response methods dull gorchymyn ac ymateb commander cadlywydd (military) commander comander (naval) commander-in-chief cadbennaeth commander-in-chiefs cadbennaeth commanders cadlywydd (military) commanders comander (naval) commandery pencadlys commands gorchymyn commas coma commencement date dyddiad cychwyn commencement dates dyddiad cychwyn commendation cymeradwyaeth commendations cymeradwyaeth commensal cydfwytaol commensalism cydfwytäedd commensalisms cydfwytäedd commensurable cyfesur comment sylw comment bank cronfa sylwadau comment banks cronfa sylwadau commentary esboniad (=explanatory notes) commentary sylwebaeth (=descriptive spoken account) commentator esboniwr (on bible) commentator sylwebydd (on game etc) commentators esboniwr (on bible) commentators sylwebydd (on game etc) comments sylw commerce masnach commerces masnach commercial masnachol commercial application cymhwysiad masnachol commercial applications cymhwysiad masnachol commercial arithmetic rhifyddeg masnach commercial arithmetics rhifyddeg masnach commercial art celfyddyd fasnachol commercial arts celfyddyd fasnachol commercial baby foods bwydydd masnachol i fabanod commercial bank banc masnachol commercial banks banc masnachol commercial capitalism cyfalafiaeth fasnach commercial capitalisms cyfalafiaeth fasnach commercial court llys masnach commercial courts llys masnach commercial data processing prosesu data masnachol commercial education addysg fasnachol commercial educations addysg fasnachol commercial function swyddogaeth fasnachol commercial functions swyddogaeth fasnachol commercial laundry golchdy masnachol commercial law cyfraith fasnachol commercial laws cyfraith fasnachol commercial pattern patrwm parod commercial patterns patrwm parod commercial privilege braint fasnachol commercial privileges braint fasnachol commercial rivalry cystadleuaeth fasnachol commercial traveller trafaeliwr commercial travellers trafaeliwr commercial viability dichonoldeb masnachol comminution pyloriant comminutions pyloriant commissar comisar commissars comisar commissary general dirprwy cyffredinol commissary generals dirprwy cyffredinol commission comisiwn commission comisiynu commission of array comisiwn aráe commission of oyer and terminer comisiwn oyer a terminer commissioner comisiynydd commissioners comisiynydd commissions comisiwn commit traddodi (for trial) commit suicide cyflawni hunanladdiad commitment ymrwymiad commitments ymrwymiad commitments to expenditure ymrwymiadau gwario committed ymrwymedig committee pwyllgor committees pwyllgor commode comôd commodes comôd commodity nwydd commodore comodor commodores comodor common cyffredin common agricultural policy polisi amaethyddol cyffredin (CAP) common ancestor cyd-hynafiad common ancestors cyd-hynafiad common assault ymosod cyffredin common chord cord cyffredin common chords cord cyffredin common cold annwyd common colds annwyd common component cydran gyffredin common components cydran gyffredin common curriculum cwricwlwm cyffredin common curriculums cwricwlwm cyffredin common difference gwahaniaeth cyffredin common differences gwahaniaeth cyffredin common ethos ethos cyffredin common fraction ffracsiwn cyffredin common fractions ffracsiwn cyffredin common joint uniad cyffredin common joints uniad cyffredin common land tir comin common lands tir comin common law cyfraith gwlad common laws cyfraith gwlad common logarithm logarithm cyffredin common logarithms logarithm cyffredin common metre mesur cyffredin common metres mesur cyffredin common mode modd-cyffredin common mode rejection ratio cymhareb wrthod modd-cyffredin common of pasture cytawl pori common of turbary hawl torri mawn common penny treth y geiniog common practice course cwrs ymarfer cyffredinol common practice courses cwrs ymarfer cyffredinol common professional examination arholiad cyffredinol proffesiynol common professional examinations arholiad cyffredinol proffesiynol common ratio cymhareb gyffredin common room ystafell gyffredin common rooms ystafell gyffredin common salt halen common salts halen common sense synnwyr cyffredin common senses synnwyr cyffredin common speech iaith gyffredin common speeches iaith gyffredin common standard unit uned safonol gyffredin common standard units uned safonol gyffredin common standards safonau cyffredin common syllabus maes llafur cyffredin common thread edau gyffredin common threads edau gyffredin common time amser cyffredin common times amser cyffredin common values gwerthoedd cyffredin commonalty pobl gyffredin commoner gwrêng commoners gwrêng commote cwmwd commotes cwmwd communal cymunedol commune comiwn communes comiwn communicate cyfathrebu communicate cyfleu communicate ideas cyfleu syniadau communicate information cyfleu gwybodaeth communicate meaning cyfleu ystyr communication cyfathrebiad communication channel sianel gyfathrebu communication channels sianel gyfathrebu communication difficulty anhawster cyfathrebu communication line lein gyfathrebu communication lines lein gyfathrebu communication link cyswllt cyfathrebu communication links cyswllt cyfathrebu communication network rhwydwaith cyfathrebu communication networks rhwydwaith cyfathrebu communication skill sgìl cyfathrebu communication skills sgìl cyfathrebu communication system system gyfathrebu communication systems system gyfathrebu communicational cyfathrebol communications cyfathrebiad communications processing prosesu cyfathrebiadau communion cymundeb communion table bwrdd y cymun communion tables bwrdd y cymun communions cymundeb communism comiwnyddiaeth communisms comiwnyddiaeth communist comiwnydd communist comiwnyddol communists comiwnydd community cymuned community care gofal yn y gymuned community care plan cynllun gofal yn y gymuned community care plans cynllun gofal yn y gymuned community care worker gweithiwr gofal yn y gymuned community care workers gweithiwr gofal yn y gymuned community cares gofal yn y gymuned community centre canolfan gymunedol community centres canolfan gymunedol community college coleg cymunedol community colleges coleg cymunedol community development datblygiad cymunedol community developments datblygiad cymunedol community education addysg gymunedol community educations addysg gymunedol community home cartref cymuned community homes cartref cymuned community hospital ysbyty cymuned community hospitals ysbyty cymuned community links cysylltiadau gyda'r gymuned community living service gwasanaeth byw yn y gymuned community living services gwasanaeth byw yn y gymuned community mental health team tîm cymuned iechyd meddwl community mental health teams tîm cymuned iechyd meddwl community nurse nyrs cymuned community nurses nyrs cymuned community physician meddyg cymuned community physicians meddyg cymuned community psychiatric nurse nyrs seiciatrig cymuned community psychiatric nurses nyrs seiciatrig cymuned community school ysgol gymunedol community schools ysgol gymunedol community spirit ysbryd cymunedol community spirits ysbryd cymunedol community support service gwasanaeth cynnal yn y gymuned community support services gwasanaeth cynnal yn y gymuned community unit uned gymunedol community units uned gymunedol commutation cymudiad commutations cymudiad commutative cymudol commutative group grŵp cymudol commutative groups grŵp cymudol commutative law deddf gymudol commutative laws deddf gymudol commutator cymudadur commutators cymudadur commute cymudo commuter cymudwr commuters cymudwr commuting pattern patrwm cymudo commuting patterns patrwm cymudo compact cryno compact cywasgu compaction cywasgiad compactions cywasgiad compactness crynoder compactor crynodiadur compactors crynodiadur companion cell cymargell companion cells cymargell companion teaching addysgu cefnogol company cwmni company finance arian cwmni company finances arian cwmni company logo logo'r cwmni company secretary ysgrifennydd y cwmni company union undeb y cwmni company unionism undebaeth cwmni company unionisms undebaeth cwmni company unions undeb y cwmni company website gwefan cwmni company websites gwefan cwmni comparability cymaroldeb comparable cymaradwy (in economics) comparative cymharol comparative advantage mantais gymharol comparative advantages mantais gymharol comparative cost cost gymharol comparative costs cost gymharol comparative linguistics ieithyddiaeth gymharol comparative psychology seicoleg gymharol comparative reading darllen cymharol comparative readings darllen cymharol comparative scale graddfa gymharol comparative scales graddfa gymharol comparative study astudiaeth gymharol comparator cymharydd comparators cymharydd compare cymharu compare results cymharu canlyniadau comparison cymhariaeth comparison goods nwyddau cymhariaeth comparisons cymhariaeth compartment adran compartments adran compass cwmpas (=extent, range of tone) compass cwmpawd (to find direction) compass callipers caliperau cwmpas compass housing amgaead cwmpawd compass housings amgaead cwmpawd compass north gogledd cwmpawd compass norths gogledd cwmpawd compass plane plaen amgrwm compass planes plaen amgrwm compass saw llif gwmpas compass saws llif gwmpas compass walk taith gwmpawd compass walks taith gwmpawd compassion tosturi compassions tosturi compatibility cydweddiad (of computer parts) compatible cydnaws (in general) compensate digolledu (=recompense) compensate gwneud iawn (=make amends) compensation iawndal compensation agreement cytundeb iawndal compensation agreements cytundeb iawndal compensations iawndal compensatory changes newidiadau cydadferol compensatory education addysg gydadferol compensatory educations addysg gydadferol compensatory exercise ymarfer cydadfer compensatory exercises ymarfer cydadfer compensatory programme rhaglen gydadferol compensatory programmes rhaglen gydadferol compete cystadlu compete for the ball cystadlu am y bêl competence cymhwysedd (in education) competence cymhwyster (of river) competences cymhwysedd (in education) competences cymhwyster (of river) competent cymwys competition cystadleuaeth competition for resources cystadlu am adnoddau competition pricing prisio ar sail cystadleuaeth competition rule rheol cystadlu competition rules rheol cystadlu competitions cystadleuaeth competitive cystadleuol competitive exclusion gwaharddiad cystadleuol competitive exclusions gwaharddiad cystadleuol competitive game gêm gystadleuol competitive games gêm gystadleuol competitive play chwarae cystadleuol competitive release rhyddhad cystadleuol competitive releases rhyddhad cystadleuol competitive task tasg gystadleuol competitive tasks tasg gystadleuol competitive team games gemau tîm cystadleuol competitiveness awydd i gystadlu competitor cystadleuydd competitors cystadleuydd compilation crynhoad compilation process proses grynhoad compilations crynhoad compile crynhoi compiled language iaith grynoadol compiled languages iaith grynoadol compiler crynhoydd compilers crynhoydd compiling program rhaglen grynhoi compiling programs rhaglen grynhoi complain cwyno complaint anhwylder (physical / medical) complaint cwyn (=grievance) complaints anhwylder (physical / medical) complaints cwyn (=grievance) complaints procedure dull gweithredu cwynion complaints procedures dull gweithredu cwynion complement cyflenwad complement cyflenwi complementarity cyfatebolrwydd complementary cyflenwol complementary addition method dull adio cyflenwol complementary addition methods dull adio cyflenwol complementary angle ongl gyflenwol complementary angles ongl gyflenwol complementary base pair pâr cyflenwol o fasau complementary base pairs pâr cyflenwol o fasau complementary colour lliw cyflenwol complementary colours lliw cyflenwol complementary therapy therapi cyflenwol complements cyflenwad complements cyfun-nwyddau (of goods) complete cwblhau complete cyflawn complete cadence diweddeb berffaith complete cadences diweddeb berffaith complete circuit cylched gyflawn complete circuits cylched gyflawn complete primitive datrysiad cyflawn complete primitives datrysiad cyflawn complete radiation pelydriad cyflawn complete radiations pelydriad cyflawn complete revolution cylchdro cyflawn complete revolutions cylchdro cyflawn complete section trychiad cyflawn complete sectional elevation golwg trychiadol cyflawn complete sectional elevations golwg trychiadol cyflawn complete sections trychiad cyflawn complete the square cwblhau'r sgwâr complete turn tro cyflawn complete turns tro cyflawn complete view golwg cyflawn complete views golwg cyflawn completely yn llwyr completeness cyflawnrwydd complex cymhleth (=complicated) complex cymhlyg (consisting of related parts composite) complex cymhlygu (of chemicals) complex cymhlygyn (in chemistry) complex conjugate cyfiau cymhlyg complex conjugates cyfiau cymhlyg complex event digwyddiad cymhleth complex events digwyddiad cymhleth complex function ffwythiant cymhlyg complex functions ffwythiant cymhlyg complex instruction set set cyfarwyddiadau cymhleth complex instruction sets set cyfarwyddiadau cymhleth complex number rhif cymhlyg complex numbers rhif cymhlyg complex roots gwreiddiau cymhlyg complex sequence of movements dilyniant cymhleth o symudiadau complex skills sgiliau cymhleth complex variable newidyn cymhlyg complex variables newidyn cymhlyg complexes cymhlygyn (in chemistry) complexity cymhlethdod compliance cydymffurfiad (in general) compliances cydymffurfiad (in general) complicated fracture torasgwrn cymhleth complicated fractures torasgwrn cymhleth complication cymhlethdod complications cymhlethdod compline cwmplin complines cwmplin compoboard cywasgfwrdd compoboards cywasgfwrdd component cydran component drawing lluniad cydrannau component drawings lluniad cydrannau component molecule moleciwl cydrannol component molecules moleciwl cydrannol component of a force cydran grym component of velocity cydran cyflymder component part darn cydrannol component parts darn cydrannol components cydran compose cyfansoddi compose sequences cyfansoddi dilyniannau composer cyfansoddwr composers cyfansoddwr composite cyfansawdd composite demand galw cyfansawdd composite demands galw cyfansawdd composite end view ochrolwg cyfansawdd composite end views ochrolwg cyfansawdd composite materials defnyddiau cyfansawdd composite stitch pwyth cyfansawdd composite stitches pwyth cyfansawdd composite view golwg cyfansawdd composite views golwg cyfansawdd composition cyfansoddiad (in general) composition traethawd (=essay) composition of blood cyfansoddiad gwaed composition pedal pedal cyfuno composition pedals pedal cyfuno composition piston piston cyfuno composition pistons piston cyfuno compositional cyfansoddiadol compositional weight pwyslais cyfansoddiadol compositional weights pwyslais cyfansoddiadol compositions cyfansoddiad (in general) compositions traethawd (=essay) compote compot compotes compot compound cyfansawdd compound cyfansoddyn compound cymhlethu (a problem etc) compound attack ymosod cyfun compound attacks ymosod cyfun compound binary form ffurf ddwyran gyfansawdd compound binary forms ffurf ddwyran gyfansawdd compound curve cromlin gyfansawdd compound curves cromlin gyfansawdd compound drive gyriad cyfansawdd compound drives gyriad cyfansawdd compound eye llygad cyfansawdd compound eyes llygad cyfansawdd compound fracture torasgwrn agored compound fractures torasgwrn agored compound gear train trên gêr cyfansawdd compound gear trains trên gêr cyfansawdd compound inflorescence fflurgainc gyfansawdd compound inflorescences fflurgainc gyfansawdd compound interest adlog compound interests adlog compound interval cyfwng cyfansawdd compound intervals cyfwng cyfansawdd compound key allwedd gyfansawdd compound leaf deilen gyfansawdd compound leafs deilen gyfansawdd compound line graph graff llinell gyfansawdd compound line graphs graff llinell gyfansawdd compound matrix matrics cyfansawdd compound matrixes matrics cyfansawdd compound pendulum pendil cyfansawdd compound pendulums pendil cyfansawdd compound riposte riposte cyfun compound ripostes riposte cyfun compound shape siâp cyfansawdd compound shapes siâp cyfansawdd compound shoreline traethlin cyfansawdd compound shorelines traethlin cyfansawdd compound slide llithryn cyfansawdd compound slides llithryn cyfansawdd compound stain staen cyfansawdd compound stains staen cyfansawdd compound train trên cyfansawdd compound trains trên cyfansawdd compound wound dirwyniad cyfansawdd compound wounds dirwyniad cyfansawdd compounding vectors cyfuno fectorau compounds cyfansoddyn comprehensibility eglurder comprehension dealltwriaeth comprehension test prawf darllen a deall comprehension tests prawf darllen a deall comprehensions dealltwriaeth comprehensive cynhwysfawr (=all-inclusive) comprehensive education addysg gyfun comprehensive educations addysg gyfun comprehensive insurance yswiriant cyfun comprehensive insurances yswiriant cyfun comprehensive school ysgol gyfun comprehensive schools ysgol gyfun comprehensive training programme rhaglen hyfforddi gynhwysfawr comprehensive training programmes rhaglen hyfforddi gynhwysfawr compress cywasgu compressed cywasgedig compressed air aer cywasgedig compressed airs aer cywasgedig compressibility cywasgadwyedd compressible cywasgadwy compression cywasgedd (=reduction in volume) compression cywasgiad (action of) compression moulding mowldin cywasgedd compression mouldings mowldin cywasgedd compression spring sbring cywasgu compression springs sbring cywasgu compressions cywasgedd (=reduction in volume) compressions cywasgiad (action of) compressive cywasgol compressive force grym cywasgol compressive forces grym cywasgol compressives cywasgol compressor cywasgydd compressors cywasgydd compromise cyfaddawd compromise of Avranches cyfaddawd Avranches compromises cyfaddawd comptroller distain comptrollers distain compulsion gorfodaeth compulsions gorfodaeth compulsory gorfodol compulsory count cownt gorfod compulsory counts cownt gorfod compulsory education addysg orfodol compulsory educations addysg orfodol compulsory purchase order gorchymyn prynu gorfodol compulsory purchase orders gorchymyn prynu gorfodol compulsory subject pwnc gorfodol compulsory subjects pwnc gorfodol computation cyfrifiant computational method dull cyfrifiannu computational methods dull cyfrifiannu computations cyfrifiant compute cyfrifiannu computer cyfrifiadur computer cyfrifiadurol computer aided design cynllunio drwy gymorth cyfrifiadur (CAD) computer aided education addysg drwy gymorth cyfrifiadur (CAE) computer aided educations addysg drwy gymorth cyfrifiadur (CAE) computer aided instruction hyfforddiant drwy gymorth cyfrifiadur (CAI) computer aided instructions hyfforddiant drwy gymorth cyfrifiadur (CAI) computer aided learning dysgu drwy gymorth cyfrifiadur (CAL) computer aided manufacture gweithgynhyrchu drwy gymorth cyfrifiadur (CAM) computer aided production management rheoli cynhyrchu drwy gymorth cyfrifiadur (CAPM) computer application rhaglen gyfrifiadurol computer applications rhaglen gyfrifiadurol computer architecture saernïaeth gyfrifiadurol computer architectures saernïaeth gyfrifiadurol computer based method dull cyfrifiadurol computer based methods dull cyfrifiadurol computer control rheolaeth gyfrifiadurol computer controls rheolaeth gyfrifiadurol computer game gêm cyfrifiadur computer games gêm cyfrifiadur computer graphics graffigwaith cyfrifiadurol computer interface rhyngwyneb cyfrifiadurol computer interfaces rhyngwyneb cyfrifiadurol computer literacy llythrennedd cyfrifiadurol computer managed learning dysgu dan arweiniad cyfrifiadur (CML) computer model model cyfrifiadurol computer modelling modelu cyfrifiadurol computer models model cyfrifiadurol computer music cerddoriaeth gyfrifiadur computer musics cerddoriaeth gyfrifiadur computer network rhwydwaith cyfrifiadurol computer networks rhwydwaith cyfrifiadurol computer operator cyfrifiadurwr computer operators cyfrifiadurwr computer output to microfilm microffilm o gyfrifiadur (COM) computer personnel personél cyfrifiadur computer personnels personél cyfrifiadur computer printout allbrint cyfrifiadurol computer printouts allbrint cyfrifiadurol computer readable darllenadwy i gyfrifiadur computer science cyfrifiadureg computer sciences cyfrifiadureg computer scientist cyfrifiadurwr computer scientists cyfrifiadurwr computer simulation efelychiad cyfrifiadurol computer simulations efelychiad cyfrifiadurol computer solution ateb cyfrifiadurol computer solutions ateb cyfrifiadurol computer spreadsheet taenlen gyfrifiadurol computer spreadsheets taenlen gyfrifiadurol computer studies astudiaethau cyfrifiadur computer system system gyfrifiadurol computer systems system gyfrifiadurol computer user defnyddiwr cyfrifiadur computer users defnyddiwr cyfrifiadur computer workstation gweithfan cyfrifiadur computer workstations gweithfan cyfrifiadur computer-controlled a reolir gan gyfrifiadur computer-marked assignment aseiniad a fercir â chyfrifiadur (CMA) computer-marked assignments aseiniad a fercir â chyfrifiadur (CMA) computerize cyfrifiaduro computerized cyfrifiadurol computerized booking system system archebu gyfrifiadurol computerized booking systems system archebu gyfrifiadurol computerized food ordering system archebu bwyd gyfrifiadurol computerized food orderings system archebu bwyd gyfrifiadurol computers cyfrifiadur computing cyfrifiadura comrade cymrawd comrades cymrawd con sordino con sordino conation ymdrechiad conations ymdrechiad conative ymdrechol concatenate cydgadwyno concatenation cydgadwynedd concatenations cydgadwynedd concave ceugrwm concave curvature ceugrymedd concave curvatures ceugrymedd concave curve cromlin geugrwm concave curves cromlin geugrwm concave lens lens ceugrwm concave milling cutter melinwr ceugrwm concave milling cutters melinwr ceugrwm concave slope llethr ceugrwm concave slopes llethr ceugrwm concave surface arwyneb ceugrwm concave surfaces arwyneb ceugrwm concavity ceugrymedd conceal cuddio concealed cudd concealed coalfield maes glo cudd concealed coalfields maes glo cudd concealed lighting golau cudd concealed lightings golau cudd concealed opening agoriad cudd concealed openings agoriad cudd conceive beichiogi (=become pregnant) conceive cenhedlu (a child) concentrate canolbwyntio (mind) concentrate crynodi (in chemistry) concentrate dwysáu (sauce) concentrated crynodedig (in chemistry) concentrated acid asid crynodedig concentrated acids asid crynodedig concentration crynodiad (in chemistry) concentration camp gwersyll crynhoi concentration camps gwersyll crynhoi concentration gradient graddiant crynodiad concentration gradients graddiant crynodiad concentrations crynodiad (in chemistry) concentric cydganol concentric circles cylchoedd cydganol concept cysyniad concept keyboard cyffyrddell concept keyboards cyffyrddell concept of capacitance cysyniad cynhwysiant concept of god cysyniad o dduw concept sorting test prawf cysyniadau concept sorting tests prawf cysyniadau conceptacle conseptagl conceptacles conseptagl conception cenhedliad (of a child) conceptions cenhedliad (of a child) concepts cysyniad concepts of leisure cysyniadau hamdden conceptual cysyniadol conceptual development datblygiad cysyniadol conceptual developments datblygiad cysyniadol conceptual framework fframwaith cysyniadol conceptual frameworks fframwaith cysyniadol conceptual understanding dealltwriaeth gysyniadol conceptual understandings dealltwriaeth gysyniadol concert cyngerdd concert harp telyn gyngerdd concert harps telyn gyngerdd concert overture agorawd cyngerdd concert overtures agorawd cyngerdd concert pitch traw cyngerdd concert pitches traw cyngerdd concertante concertante concertantes concertante concertina consertina concertinas consertina concertino concertino concerto concerto concerto grosso concerto grosso concerts cyngerdd concession consesiwn concessions consesiwn conchoid concoid conchoidal concoidaidd conchoids concoid conciliar cynghoraidd conciliation cymodi concise cryno conclave cymanfa conclave of cardinals cymanfa'r cardinaliaid conclaves cymanfa conclusion casgliad conclusions casgliad concomitant cydredol concord cytgord (=harmony) concord cytundeb (=treaty) concordant cydgordiol concordat concordat concordats concordat concords cytgord (=harmony) concords cytundeb (=treaty) concrete concrit concrete diriaethol concrete aggregates agregau concrit concrete art celfyddyd ddiriaethol concrete arts celfyddyd ddiriaethol concrete foundation sylfaen goncrit concrete foundations sylfaen goncrit concrete music cerddoriaeth ddiriaethol concrete musics cerddoriaeth ddiriaethol concrete operational stage stad weithredu ddiriaethol concrete operational stages stad weithredu ddiriaethol concrete operational thought meddwl gweithredu diriaethol concrete operational thoughts meddwl gweithredu diriaethol concrete pad pad concrit concrete pads pad concrit concretes concrit concretion concretiad concretions concretiad concretization diriaetholi concubinage gordderchaeth concubinages gordderchaeth concubine gordderch concubines gordderch concur cydgroesi (in mathematics) concurrent cydamserol concurrent cyfamserol (processes) concurrent cytgroes (lines etc) concyclic cydgylchol condensation cyddwysiad (in science) condensation centre canolfan cyddwysiad condensation centres canolfan cyddwysiad condensation polymer polymer cyddwyso condensation polymers polymer cyddwyso condensation reaction adwaith cyddwyso condensation reactions adwaith cyddwyso condensations cyddwysiad (in science) condense cyddwyso condensed cyddwysedig condensed milk llaeth cyddwysedig condensed milks llaeth cyddwysedig condenser cyddwysydd (distilling in chemistry) condenser cynhwysydd (=capacitor) condenser lens lens cyddwyso condensers cyddwysydd (distilling in chemistry) condensers cynhwysydd (=capacitor) condiments pupur a halen condition amod (=stipulation etc) condition cyflwr (=state) condition code cod cyflwr condition codes cod cyflwr condition of sale amod gwerthu condition of service amod gwasanaeth condition survey arolwg cyflwr conditional amodol conditional branch instruction cyfarwyddyd canghennu amodol conditional branch instructions cyfarwyddyd canghennu amodol conditional fee ffi amodol conditional fee arrangements trefniadau ffioedd amodol conditional fees ffi amodol conditional jump naid amodol conditional jumps naid amodol conditional probability tebygolrwydd amodol conditional transfer trosglwyddiad amodol conditional transfers trosglwyddiad amodol conditioned cyflyredig (as of reflex) conditioned reflex atgyrch cyflyredig conditioned reflexes atgyrch cyflyredig conditioner cyflyrydd conditioners cyflyrydd conditioning cyflyru conditions amod (=stipulation etc) conditions cyflwr (=state) conditions of trading amodau masnach condom condom condominium condominiwm (of building) condominium cydlywodraeth (joint control of a State's affairs by other States) condominiums condominiwm (of building) condominiums cydlywodraeth (joint control of a State's affairs by other States) condoms condom conduct arwain (=lead) conduct cynnal (an experiment) conduct dargludo (=transmit by conduction) conduct ymddygiad (=behaviour) conductance dargludiant conductances dargludiant conducting dargludol conduction dargludiad conductions dargludiad conductive hearing loss colli clyw yn y glust ganol conductivity dargludedd conductor arweinydd (of orchestra) conductor dargludydd (of electricity) conductor of heat dargludydd gwres conductors arweinydd (of orchestra) conductors dargludydd (of electricity) conducts ymddygiad (=behaviour) conduit cwndid conduits cwndid condyle condyl condyles condyl cone côn cone pigwrn (of the eye) cone centre canol côn cone centres canol côn cone pat pat côn cone pats pat côn cone pulley pwli côn cone stand ateg gôn cone stands ateg gôn cones côn cones pigwrn (of the eye) confectionery melysion confederate state talaith gydffederal (US) confederate states talaith gydffederal (US) confederation cydffederasiwn confederations cydffederasiwn confer ymgynghori conference cynhadledd conferences cynhadledd confess cyffesu confession cyfaddefiad (=admission of guilt) confession cyffes (in general) confession of faith cyffes ffydd confessional cyffesgell confessionals cyffesgell confessions cyfaddefiad (=admission of guilt) confessions cyffes (in general) confessor cyffeswr confessors cyffeswr confidence hyder confidence in water hyder mewn dŵr confidence interval cyfwng hyder confidence intervals cyfwng hyder confidence limit ffin hyder confidence limits ffin hyder confidences hyder confidential cyfrinachol confidential information gwybodaeth gyfrinachol confidential informations gwybodaeth gyfrinachol confidential record cofnod cyfrinachol confidential records cofnod cyfrinachol confidentiality cyfrinachedd configure ffurfweddu confinement cyfnod geni confinements cyfnod geni confirm cadarnhau confirmation bedydd esgob (in church) confirmation cadarnhad (=establish more fully) confirmations bedydd esgob (in church) confirmations cadarnhad (=establish more fully) conflict gwrthdaro conflicting demands gofynion sy'n gwrthdaro confluence cydlifiad confluences cydlifiad confocal cydffocal conformable cydffurfiadwy conformable beds haenau cydffurfiadwy conformal cydffurf conformal mapping mapio cydffurfiol conformation cydffurfiad conformational cydffurfiol conformational analysis dadansoddiad cydffurfiol conformations cydffurfiad conforming bandage rhwymyn cydffurfiol conforming bandages rhwymyn cydffurfiol conforming shape function ffwythiant siâp cydffurfiol conforming shape functions ffwythiant siâp cydffurfiol confrontation gwrthdaro confuse cymysgu confuse drysu confused drainage draeniad dryslyd confused drainages draeniad dryslyd conga conga congas conga congeliturbate rhewdyrfiad congeliturbates rhewdyrfiad congeliturbation rhewdyrfiad congeliturbations rhewdyrfiad congenital malformation camffurfiad cynhenid congenital malformations camffurfiad cynhenid conger eel congren conger eels congren congest gordyrru congested gordyrrog congestion gorlenwad (of blood, mucus etc) congestion tagfa (of traffic) congestions gorlenwad (of blood, mucus etc) congestions tagfa (of traffic) conglomerate clymfaen (in geology) conglomerate cyd-dyrru conglomerate uwchgwmni (of company, organization) conglomerates clymfaen (in geology) conglomerates uwchgwmni (of company, organization) conglomeration crugiad (in geology) conglomeration cyd-dyriad (in commerce) conglomerations crugiad (in geology) conglomerations cyd-dyriad (in commerce) congregation cynulleidfa congregations cynulleidfa congress cyngres congressional cyngresol congruence cyfathiant congruences cyfathiant congruent cyfath congruent triangles trionglau cyfath conic conig conic section trychiad conig conic sections trychiad conig conical conigol conical flask fflasg gonigol conical flasks fflasg gonigol conical head rivet rhybed pen côn conical head rivets rhybed pen côn conical projection tafluniad conigol conical projections tafluniad conigol conicoid conicoid conicoids conicoid conifer conwydden coniferous forest coedwig gonwydd coniferous forests coedwig gonwydd coniferous tree conwydden coniferous trees conwydden conifers conwydden conjecture dyfaliad conjectures dyfaliad conjugate cyfiau conjugate cyfuno conjugate pair pâr cyfiau conjugate pairs pâr cyfiau conjugate point pwynt cyfiau conjugate points pwynt cyfiau conjugated cyfunedig conjugates cyfiau conjugation cyfunedd (in science) conjugations cyfunedd (in science) conjunct motion symud gam a cham conjunctiva cyfbilen (of eye) conjunctivas cyfbilen (of eye) conjunctivitis llid y gyfbilen connect cysylltu connected cysylltiedig connecting rod rhoden gyswllt connecting rods rhoden gyswllt connection cysylltiad connections cysylltiad connective cyswllt connective cysylltyn connective tissue meinwe gyswllt connective tissues meinwe gyswllt connectives cysylltyn connectivity cysylltedd connector cysylltydd connectors cysylltydd connotation arwyddocâd connotations arwyddocâd conoid conoid conoids conoid conqueror gorchfygwr conquerors gorchfygwr conquest concwest conquests concwest consciousness ymwybyddiaeth consciousness-raising codi ymwybyddiaeth conscription consgripsiwn conscriptions consgripsiwn consecrate cysegru consecrated cysegredig consecrated wafer afrlladen consecrated wafers afrlladen consecration cysegriad consecrations cysegriad consecutive dilynol consecutive fifths and octaves pumedau ac wythfedau dilynol consecutive revolutions cylchdroeon dilynol consecutives dilynolion consensus consensws consent cydsyniad consent form ffurflen gydsynio consent forms ffurflen gydsynio consents cydsyniad consequence canlyniad consequences canlyniad consequent canlyniad (in canon) consequent canlynol consequent cydlif (stream) consequent stream ffrwd gydlif consequent streams ffrwd gydlif consequentialism canlyniadaeth consequentialisms canlyniadaeth consequents canlyniad (in canon) consequents cydlif (stream) conservation cadwraeth (of mass, energy, momentum) conservation area ardal gadwraeth conservation areas ardal gadwraeth conservation of charge cadwraeth gwefr conservation of energy cadwraeth egni conservation of momentum cadwraeth momentwm conservation of number cadwraeth rhif conservation officer swyddog cadwraeth (of person) conservation officers swyddog cadwraeth (of person) conservations cadwraeth (of mass, energy, momentum) conservatism ceidwadaeth conservatisms ceidwadaeth conservative cadwrol (in scientific usage) conservative ceidwadol (in social and political usage) conservative ceidwadwr conservative field of force maes cadwrol grym conservative replication dyblygiad cadwrol conservative replications dyblygiad cadwrol conservative treatment triniaeth geidwadol conservative treatments triniaeth geidwadol conservatives ceidwadwr conservatoire conservatoire conservatoires conservatoire conserve cyffrwyth meddal (=fruit preserve) conserve cynilo (=not waste) conserve gwarchod (=keep from damage) conserves cyffrwyth meddal (=fruit preserve) consider ystyried consideration ystyriaeth considerations ystyriaeth consignment llwyth consignments llwyth consistency ansawdd (=degree of density) consistency cysondeb (=state of being constant) consistent cyson consistent performance perfformio cyson consistorial consistoraidd consistory consistori console consol console light lamp gonsol console lights lamp gonsol console log log consol console logs log consol console switch switsh consol console switches switsh consol console typewriter teipiadur consol console typewriters teipiadur consol consoles consol consolidate cyfnerthu consolidate skills cyfnerthu medrau consolidated cyfnerthedig consolidated fund prif gronfa wladol consolidated funds prif gronfa wladol consommé consommé consommés consommé consonance cyseinedd consonances cyseinedd consonant interval cyfwng cyseiniol consonant intervals cyfwng cyseiniol consort consort (in music) consort cydweddog (=wife or husband, especially of royalty) consort of viols consort feiolau consortium consortiwm consortiums consortiwm consorts consort (in music) consorts cydweddog (=wife or husband, especially of royalty) conspiracy cynllwyn conspire cynllwynio constable cwnstabl constables cwnstabl constancy sefydlogrwydd constancy of colour unffurfiaeth lliw constancy of shape unffurfiaeth siâp constant cyson constant cysonyn constant acceleration cyflymiad cyson constant accelerations cyflymiad cyson constant boiling mixture cymysgedd pwynt berwi cyson constant boiling mixtures cymysgedd pwynt berwi cyson constant of proportionality cysonyn cyfrannol constant pressure gwasgedd cyson constant pressures gwasgedd cyson constant ratio curve cromlin cymhareb gyson constant ratio curves cromlin cymhareb gyson constant slope llethr cyson constant slopes llethr cyson constant temperature tymheredd cyson constant temperatures tymheredd cyson constant velocity cyflymder cyson constants cysonyn constellation clwstwr (=group of persons, ideas etc) constellation cytser (of stars) constellation of towns clwstwr o drefi constellations clwstwr (=group of persons, ideas etc) constellations cytser (of stars) constipated rhwym constipation rhwymedd constipations rhwymedd constituent ansoddyn (chemical) constituent cyfansoddyn (of nucleus) constituent assembly cynulliad cyfansoddol constituent element elfen ansoddol constituent elements elfen ansoddol constituent group grŵp cyfansoddol constituent groups grŵp cyfansoddol constituents ansoddyn (chemical) constituents cyfansoddyn (of nucleus) constitution cyfansoddiad constitutional cyfansoddiadol constitutional history hanes cyfansoddiadol constitutionalism cyfansoddiaeth constitutionalisms cyfansoddiaeth constitutions cyfansoddiad constrain gorfodi (=bring about by compulsion) constrained motion mudiant cyfyngedig constrained motions mudiant cyfyngedig constrained to move horizontally wedi'i gorfodi i symud yn llorweddol (with feminine nouns) constrained to move horizontally wedi'i orfodi i symud yn llorweddol (with masculine nouns) constrained to move vertically wedi'i gorfodi i symud yn fertigol (with feminine nouns) constrained to move vertically wedi'i orfodi i symud yn fertigol (with masculine nouns) constraint cyfyngiad (in economics) constraint cyfyngydd (in physics) constraints cyfyngiad (in economics) constraints cyfyngydd (in physics) constrict darwasgu constricted darwasgedig constriction darwasgiad constrictions darwasgiad construct lluniad (of the mind etc) construct llunio (=form, create) construct shapes llunio siapiau constructed estuary moryd wneud constructing an ellipse llunio elips construction adeiladwaith (of frame / building) construction lluniad (of abstract / geometrical) construction craft crefft adeiladu construction crafts crefft adeiladu construction drawing lluniad adeiladu construction drawings lluniad adeiladu construction line llinell lunio construction lines llinell lunio construction paper papur adeiladwaith construction papers papur adeiladwaith construction technology technoleg adeiladu constructional toy tegan adeiladu constructions adeiladwaith (of frame / building) constructions lluniad (of abstract / geometrical) constructive adeiladol constructive interference ymyriant adeiladol constructive interferences ymyriant adeiladol constructive plate margins ymylon platiau adeiladol constructive wave ton adeiladol constructive waves ton adeiladol constructivism adeileddiaeth (in mathematics, art) constructivisms adeileddiaeth (in mathematics, art) constructivist adeileddol (in mathematics, art) constructivist adeileddwr (in mathematics, art) constructivists adeileddwr (in mathematics, art) constructs lluniad (of the mind etc) consubstantiation cydsylweddiad consubstantiations cydsylweddiad consul conswl consulate conswliaeth (in ancient Rome) consulate swyddfa is-gennad (modern) consulates conswliaeth (in ancient Rome) consulates swyddfa is-gennad (modern) consuls conswl consultancy ymgynghoriaeth consultant ymgynghorol consultant ymgynghorydd consultants ymgynghorydd consumables defnyddiau traul consumer defnyddiwr (=person who uses a product) consumer ysydd (=fire, bacteria, predator etc that consume) consumer boom ffyniant defnyddwyr consumer booms ffyniant defnyddwyr consumer conglomerate cyd-dyriad defnyddwyr consumer conglomerates cyd-dyriad defnyddwyr consumer education addysg defnyddwyr consumer educations addysg defnyddwyr consumer expenditure gwariant defnyddwyr consumer expenditures gwariant defnyddwyr consumer goods nwyddau traul consumer industry diwydiant nwyddau traul consumer market marchnad defnyddwyr consumer markets marchnad defnyddwyr consumer rights hawliau defnyddwyr consumer sovereignty sofraniaeth defnyddwyr consumer spending gwariant defnyddwyr consumer spendings gwariant defnyddwyr consumer surplus gwarged defnyddwyr consumers defnyddiwr (=person who uses a product) consumers ysydd (=fire, bacteria, predator etc that consume) consumption cymeriant (of food) consumption darfodedigaeth (medical condition) consumption treuliant (of goods) consumptions cymeriant (of food) consumptions darfodedigaeth (medical condition) consumptions treuliant (of goods) contact cyffyrddiad (=physical touch) contact cyswllt (=communication or meeting) contact cysylltu contact adhesive gludydd cyswllt contact adhesives gludydd cyswllt contact bounce adlam y cysylltau contact bounces adlam y cysylltau contact breaker cyswllt-dorrwr contact breakers cyswllt-dorrwr contact force grym cyffwrdd contact forces grym cyffwrdd contact glue glud cyswllt contact glues glud cyswllt contact grill gridyll cyswllt contact grills gridyll cyswllt contact hours oriau cyswllt contact line llinell gyswllt contact lines llinell gyswllt contact mike meic cyswllt contact mikes meic cyswllt contact process proses gyffwrdd contact push gwthiad cyffwrdd contact pushs gwthiad cyffwrdd contact sounds seiniau cyffwrdd contact time amser cyswllt contact times amser cyswllt contact zone cylchfa gyswllt contact zones cylchfa gyswllt contacts cyffyrddiad (=physical touch) contacts cyswllt (=communication or meeting) contagious cyffwrdd-ymledol contagious disease clefyd cyffwrdd-ymledol contagious diseases clefyd cyffwrdd-ymledol contain cynnwys container cynhwysydd container depot depo amlwytho container depots depo amlwytho containerization amlwythiant containerizations amlwythiant containers cynhwysydd containment cyfyngiant containments cyfyngiant contaminate halogi contamination halogiad contaminations halogiad contemporary cyfoes contemporary cyfoeswr contemporary art celfyddyd gyfoes contemporary arts celfyddyd gyfoes contemporary design cynllun cyfoes (of specific examples) contemporary design cynllunio cyfoes (as a genre) contemporary designs cynllun cyfoes (of specific examples) contemporary society cymdeithas gyfoes contemporary style arddull cyfoes contemporary styles arddull cyfoes contempt of court dirmyg llys contender cystadleuydd contenders cystadleuydd content bodlon content cynnwys content addressable file store storfa ffeiliau gynnwys-gyfeiriedig (CAFS) content addressable file stores storfa ffeiliau gynnwys-gyfeiriedig (CAFS) content analysis dadansoddi cynnwys content of science cynnwys gwyddoniaeth content-free penagored contention ymryson contentions ymryson contentious cynhennus contents cynnwys contents of paint cynhwysion paent contest cystadleuaeth contest gornest (boxing etc) contests cystadleuaeth contests gornest (boxing etc) context cyd-destun contexts cyd-destun contextual issue mater cyd-destunol contextual issues mater cyd-destunol contextual study astudiaeth gyd-destunol contiguity cyfagosrwydd continent cyfandir continental Europe cyfandir Ewrop continental drift drifft cyfandirol continental drifts drifft cyfandirol continental powers pwerau cyfandirol continental shelf sgafell gyfandirol continental shelfs sgafell gyfandirol continentality cyfandiroledd continents cyfandir contingency amodoldeb (in psychology etc) contingency plan cynllun wrth gefn contingency plans cynllun wrth gefn continuation parhad continuations parhad continue parhau continuing education addysg barhaus continuing educations addysg barhaus continuity parhad continuity of care dilyniant mewn gofal continuo continuo continuous di-dor (=unbroken) continuous assessment asesu parhaus continuous creation creu parhaus continuous curve cromlin ddi-dor continuous curves cromlin ddi-dor continuous data data di-dor continuous distribution dosraniad di-dor continuous distributions dosraniad di-dor continuous fibre ffibr di-dor continuous fibres ffibr di-dor continuous free curve cromlin rydd ddi-dor continuous free curves cromlin rydd ddi-dor continuous guidance arweiniad parhaus continuous guidances arweiniad parhaus continuous infusion arllwysiad parhaus (of action) continuous infusion trwyth parhaus (of liquid) continuous infusions arllwysiad parhaus (of action) continuous infusions trwyth parhaus (of liquid) continuous lap agoriad di-dor continuous laps agoriad di-dor continuous line llinell ddi-dor continuous lines llinell ddi-dor continuous random variable hapnewidyn di-dor continuous random variables hapnewidyn di-dor continuous smooth curve cromlin lefn ddi-dor continuous smooth curves cromlin lefn ddi-dor continuous spectrum sbectrwm di-dor continuous spectrums sbectrwm di-dor continuous stationery papur di-dor continuous stream ffrwd ddi-dor continuous streams ffrwd ddi-dor continuous strip mill melin strip ddi-dor continuous strip mills melin strip ddi-dor continuous variable newidyn di-dor continuous variables newidyn di-dor continuous yarn edafedd di-dor continuum continwwm continuums continwwm contour amlin (in mathematics) contour amlinell (=outline) contour cyfuchlinedd (in geography) contour interval cyfwng cyfuchlinol contour intervals cyfwng cyfuchlinol contour line cyfuchlin contour lines cyfuchlin contour map map cyfuchlinol contour maps map cyfuchlinol contour plan cynllun cyfuchlin contour plans cynllun cyfuchlin contours amlin (in mathematics) contours amlinell (=outline) contours cyfuchlinedd (in geography) contra bass bas dwbl contra bass player canwr bas dwbl contra bass players canwr bas dwbl contra bassoon basŵn dwbl contra bassoonist canwr basŵn dwbl contra bassoonists canwr basŵn dwbl contra bassoons basŵn dwbl contra-indication gwrthrybudd contra-indications gwrthrybudd contraception atal cenhedlu contraceptive device cyfarpar atal cenhedlu contraceptive devices cyfarpar atal cenhedlu contract contract (=agreement) contract crebachu (=draw together) contract cyfangu (=become smaller) contract costing costio contractau contracted out wedi'i chontractio allan (with feminine nouns) contracted out wedi'i gontractio allan (with masculine nouns) contractile cyfangol contractile root gwreiddyn cyfangol contractile roots gwreiddyn cyfangol contractile vacuole gwagolyn cyfangol contractile vacuoles gwagolyn cyfangol contractiles cyfangol contracting industry diwydiant enciliol contraction cyfangiad contraction pattern patrwm cyfangiad contraction patterns patrwm cyfangiad contraction rule riwl gyfangiad contraction rules riwl gyfangiad contractions cyfangiad contractor contractwr contractors contractwr contracts contract (=agreement) contracts of adhesion contractau ymlyniad contradiction gwrthddywediad contradictions gwrthddywediad contralto contralto contrapuntal gwrthbwyntiol contrapuntalist gwrthbwyntydd contrapuntalists gwrthbwyntydd contrary cyferbyn contrary motion gwrthsymudiad contrary motions gwrthsymudiad contrast cyferbyniad contrast cyferbynnu contrast of continuity cyferbyniad parhad contrast of level cyferbyniad lefel contrast of shape cyferbyniad siâp contrast of size cyferbyniad maint contrast of tension cyferbyniad tyndra contrasted characteristics nodweddion cyferbyniol contrasting cyferbyniol contrasting colour lliw cyferbyniol contrasting colours lliw cyferbyniol contrasting locality ardal gyferbyniol contrasting stimuli ysgogiadau cyferbyniol contrasting wood pren cyferbyniol contrasting woods pren cyferbyniol contrasts cyferbyniad contravening croes contribute cyfrannu contribution cyfraniad contributions cyfraniad contributory pension pensiwn cyfrannol contributory pensions pensiwn cyfrannol control cadw trefn (a class etc) control rheolaeth (=management) control rheoli (=manage) control rheolydd (in control experiment) control card cerdyn rheoli control cards cerdyn rheoli control character nod rheoli control characters nod rheoli control code cod rheoli control codes cod rheoli control description disgrifiad o'r rheolfan control descriptions disgrifiad o'r rheolfan control device dyfais reoli control devices dyfais reoli control experiment arbrawf cymharu control experiments arbrawf cymharu control floods rheoli llifogydd control injection pigiad rheoledig control injections pigiad rheoledig control investigation ymchwiliad rheoli control investigations ymchwiliad rheoli control key bysell reoli control marker marciwr rheoli control markers marciwr rheoli control measure mesur rheoli control measurement mesuriad rheoli control measurements mesuriad rheoli control measures mesur rheoli control memory cof rheoli control of equipment rheoli offer control of fullness rheoli llawnder control point rheolfan control points rheolfan control program rhaglen reoli control programs rhaglen reoli control rod rhoden reoli control rods rhoden reoli control setting rheolydd control settings rheolydd control shoot cyffyn cymharu control shoots cyffyn cymharu control switch switsh rheoli control switches switsh rheoli control system system reoli control systems system reoli control technique techneg reoli control techniques techneg reoli control technology technoleg reoli control the ball rheoli'r bêl control theory damcaniaeth reoli control unit uned reoli control units uned reoli controlled drug cyffur rheoledig controlled drugs cyffur rheoledig controlled grazing pori rheoledig controlled reading darllen dan oruchwyliaeth controlled readings darllen dan oruchwyliaeth controlled test prawf dan oruchwyliaeth controlled tests prawf dan oruchwyliaeth controller rheolydd (=regulator) controllers rheolydd (=regulator) controls rheolaeth (=management) controls rheolydd (in control experiment) conurbation cytref conurbations cytref conus arteriosus conws arteriosws convalesce gwella convalescence cyfnod gwella convalescences cyfnod gwella convalescent diet deiet gwella convalescent diets deiet gwella convection darfudiad convectional darfudol convectional rain glaw darfudol convectional rains glaw darfudol convections darfudiad convector drier sychydd darfudol convector driers sychydd darfudol convector heater gwresogydd darfudol convector heaters gwresogydd darfudol convener cynullydd conveners cynullydd convenience food bwyd cyfleus convenience foods bwyd cyfleus convenience goods nwyddau cyfleus convenient cyfleus convent lleiandy conventicle confentigl conventicles confentigl convention confensiwn (=customary practice) convention cynulliad (=assembly) conventional confensiynol conventional art celfyddyd gonfensiynol conventional arts celfyddyd gonfensiynol conventional feed porthiant confensiynol conventional feeds porthiant confensiynol conventional isometric projection tafluniad isometrig confensiynol conventional isometric projections tafluniad isometrig confensiynol conventional joint uniad confensiynol conventional joints uniad confensiynol conventional mathematical notation nodiant mathemategol confensiynol conventional mathematical notations nodiant mathemategol confensiynol conventional method dull confensiynol conventional methods dull confensiynol conventional milling melino confensiynol (up-cut) conventional notation nodiant confensiynol conventional notations nodiant confensiynol conventional sign arwydd confensiynol conventional signs arwydd confensiynol conventional symbol symbol confensiynol conventional symbols symbol confensiynol conventions confensiwn (=customary practice) conventions cynulliad (=assembly) conventions of fair play confensiynau chwarae teg convents lleiandy conventual cwfeiniad conventual cwfeiniol conventuals cwfeiniad converge cydgyfeirio convergence cydgyfeiriant convergence in distribution cydgyfeiriant o ran dosraniad convergence in probability cydgyfeiriant o ran tebygolrwydd convergence in quadratic mean cydgyfeiriant o ran cymedr cwadratig convergence limit terfan cydgyfeiriant convergence limits terfan cydgyfeiriant convergences cydgyfeiriant convergent cydgyfeiriol convergent question cwestiwn cydgyfeiriol convergent questions cwestiwn cydgyfeiriol convergent series cyfres gydgyfeiriol converging electron lens lens electron cydgyfeiriol converging lens lens cydgyfeiriol converging point pwynt cydgyfeiriol converging points pwynt cydgyfeiriol conversation sgwrs conversation piece darlun ymddiddan (of painting) conversation pieces darlun ymddiddan (of painting) conversational system system sgyrsiol conversational systems system sgyrsiol conversations sgwrs converse cyfdro converse theorem theorem gyfdro converse theorems theorem gyfdro converses cyfdro conversi brodyr lleyg conversion trawsnewidiad (in science) conversion trosiad (timber) conversion tröedigaeth (in religion) conversion graph graff trawsnewid conversion graphs graff trawsnewid conversion of energy trawsnewidiad ynni conversion table tabl trawsnewid conversion tables tabl trawsnewid conversions trawsnewidiad (in science) conversions trosiad (timber) conversions tröedigaeth (in religion) convert trawsnewid (in science) convert trosi (a try) converted try trosgais converter trawsnewidydd (e.g. Bessemer) converters trawsnewidydd (e.g. Bessemer) convex amgrwm convex curvature amgrymedd convex curvatures amgrymedd convex curve cromlin amgrwm convex curves cromlin amgrwm convex face wyneb amgrwm convex faces wyneb amgrwm convex hull hwl amgrwm convex hulls hwl amgrwm convex lens lens amgrwm convex slope llethr amgrwm convex slopes llethr amgrwm convexity amgrymedd convey cludo (=carry) convey trosglwyddo (=transfer legal title) conveyance cludiant (=transport) conveyance trosglwyddiad (of legal title) conveyance deed trawsgludiad conveyance deeds trawsgludiad conveyancer trawsgludwr conveyancers trawsgludwr conveyances cludiant (=transport) conveyances trosglwyddiad (of legal title) conveyancing trawsgludo conveyor cludydd conveyor belt cludfelt conveyor belts cludfelt conveyors cludydd convocation confocasiwn convocations confocasiwn convolution ffaltwng (=faltung) convolutions ffaltwng (=faltung) convoy cymdaith convulsion confylsiwn (medical) convulsion dirgryniad (in earthquake) convulsions confylsiwn (medical) convulsions dirgryniad (in earthquake) cook coginio cooker popty cooker hood lwfer popty cooker hoods lwfer popty cooker range popty estynedig cooker ranges popty estynedig cooker ring alch cooker rings alch cookers popty cooking apple afal coginio cooking apples afal coginio cool claear (of iron setting, weather) cool claearu (of weather) cool oer (=cold) cool oeri (in general) cool colour lliw oeraidd cool colours lliw oeraidd cool iron haearn claear cool irons haearn claear cool temperate tymherus claear cool temperate zone cylchfa dymherus glaear cool temperate zones cylchfa dymherus glaear coolant oerydd coolants oerydd cooling fan gwyntyll oeri cooling fans gwyntyll oeri cooling media cyfryngau oeri cooling system system oeri cooling systems system oeri cooling tank tanc oeri cooling tanks tanc oeri coombe rock cwmgraig coombe rocks cwmgraig cooper cowper cooper jointing uniadu cylchwr cooperate cydweithredu cooperation cydweithrediad cooperations cydweithrediad cooperative cydweithredol coopers cowper coordinate cyd-drefnol (of covalent bond) coordinate cyd-drefnu (of covalent bond) coordinate cydgysylltu (in administration) coordinate cydweddu (fashion items) coordinate cydweddyn (fashion items) coordinate cyfesuryn (in order to fix a position) coordinate axes echelinau cyfesurynnol coordinate bond bond cyd-drefnol coordinate bonds bond cyd-drefnol coordinate geometry geometreg gyfesurynnol coordinate system system gyfesurynnol coordinate systems system gyfesurynnol coordinated provision cyd-ddarpariaeth coordinated provisions cyd-ddarpariaeth coordinated separates amrywion cydwedd coordinates cydweddyn (fashion items) coordinates cyfesuryn (in order to fix a position) coordinating power gallu cyd-drefnu coordinating powers gallu cyd-drefnu coordination cyd-drefniant (of covalent bond) coordination cydgysylltu (in administration) coordination cydsymud (of movements) coordination number rhif cyd-drefnol coordination numbers rhif cyd-drefnol coordinations cyd-drefniant (of covalent bond) coordinator cydgysylltwr coordinators cydgysylltwr copal varnish farnais copal copal varnishs farnais copal cope copa (in metalwork) cope ymdopi cope and drag copa a drag copes copa (in metalwork) copier copïwr copiers copïwr coping copin (of wall) coping saw llif fwa fach coping saws llif fwa fach coping skills sgiliau ymdopi coping stone carreg gopa coping stones carreg gopa copings copin (of wall) coplanar cymhlan coplanar forces grymoedd cymhlan copper copr (Cu) copper atom atom copr copper atoms atom copr copper blank blanc copr copper blanks blanc copr copper brown brown copr copper browns brown copr copper filings naddion copr copper hammer morthwyl copr copper hammers morthwyl copr copper money arian cochion copper nail hoelen gopr copper nails hoelen gopr copper ore mwyn copr copper ores mwyn copr copper screw sgriw gopr copper screws sgriw gopr copper stud styden gopr copper studs styden gopr copper sulphate copr sylffad copper sulphates copr sylffad copper washer wasier gopr copper washers wasier gopr copper wire gwifren gopr copper wires gwifren gopr coppered screw sgriw goprog coppered screws sgriw goprog coppered wire gwifren goprog coppered wires gwifren goprog coppers copr (Cu) coppice coedlan coppice prysgoedio coppices coedlan coprophage carthysydd coprophages carthysydd coprosterol coprosterol coprosterols coprosterol copulate ymgydio copulation ymgydiad copulations ymgydiad copunctual cydbwyntiol copy copi copy copïo copy key bysell gopïo copy menu dewislen gopïo copy menus dewislen gopïo copy ruler copïo mesurydd copy-cat crime trosedd efelychu copy-cat crimes trosedd efelychu copycat theory damcaniaeth efelychu copyholder copiddeiliad copyholders copiddeiliad copyright hawlfraint copyrights hawlfraint cor anglais cor anglais coral cwrel coral stitch pwyth cwrel coral stitches pwyth cwrel coralline cwrelaidd corals cwrel corbel corbel corbelled arch bwa corbelaidd corbelled arches bwa corbelaidd corbels corbel cord cortyn corded weave gwehyddiad cordynnog corded weaves gwehyddiad cordynnog cordial cordial cordials cordial cordillera cadwyn cordilleras cadwyn cordless diwifr cords cortyn corduroy melfaréd core craidd core and foundation subjects pynciau craidd a sylfaen core area maes craidd core areas maes craidd core box blwch craidd core boxes blwch craidd core culture diwylliant craidd core cultures diwylliant craidd core curriculum cwricwlwm craidd core curriculums cwricwlwm craidd core diameter diamedr craidd core diameters diamedr craidd core impression argraff craidd core impressions argraff craidd core lipped and veneered door drws craidd wedi'i ymylu a'i argaenu core lipped and veneered doors drws craidd wedi'i ymylu a'i argaenu core memory cof craidd core pattern patrwm craidd core patterns patrwm craidd core print argraffiad craidd core prints argraffiad craidd core store storfa graidd core stores storfa graidd core subject pwnc craidd core subjects pwnc craidd core syllabus maes llafur craidd core vocabulary geirfa graidd core yarn edafedd craidd core-domain-sphere craidd-parth-cylch core-domain-spheres craidd-parth-cylch coreboard craiddfwrdd coreboards craiddfwrdd cored pattern patrwm creiddig cored patterns patrwm creiddig cored solder sodr craidd cored solders sodr craidd corer digreiddiwr corers digreiddiwr cores craidd coriander coriander corianders coriander cork corc cork corcyn cork block bloc corc cork blocks bloc corc cork bung topyn corc cork bungs topyn corc cork oak derwen gorc cork oaks derwen gorc cork ring cylch corc cork rings cylch corc cork rubber rwber corc cork rubbers rwber corc cork slab tafell gorc cork slabs tafell gorc cork tile teilsen gorc cork tiles teilsen gorc corks corcyn corky corcaidd corm corm cormoid cormaidd corms corm corn corn (=maize) corn cob tywysen corn corn cobs tywysen corn corn oil olew corn corn oils olew corn corn-beef cornbiff corn-beefs cornbiff cornea cornbilen corneal cornbilennol corneas cornbilen corner cornel corner cornelu corner arc arc y gornel corner arcs arc y gornel corner block bloc cornel corner blocks bloc cornel corner bridle joint uniad bagl cornel corner bridle joints uniad bagl cornel corner flag lluman cornel corner flags lluman cornel corner halving haneru cornel corner halving joint uniad haneru cornel corner halving joints uniad haneru cornel corner hit ergyd gornel corner hits ergyd gornel corner joint uniad cornel corner joints uniad cornel corner kick cic gornel corner kicks cic gornel corner tear darn craith rhwyg cornel corner tear darns craith rhwyg cornel corner unit uned gornel corner units uned gornel corners cornel cornet cornet cornetist canwr cornet cornetists canwr cornet cornets cornet cornetto cornetto cornflakes creision ŷd cornflour blawd corn cornflour mould mowld blawd corn cornflour moulds mowld blawd corn cornflours blawd corn cornice cornis cornice gordo (of ice, snow, rock) cornice moulding mowldin cornis cornice mouldings mowldin cornis cornices cornis cornices gordo (of ice, snow, rock) cornopean cornopean cornopeans cornopean corns corn (=maize) coro coro corolla corola corollary canlyneb corollas corola corona corona coronary coronaidd coronary artery rhydweli goronaidd coronary heart disease clefyd coronaidd y galon coronary heart diseases clefyd coronaidd y galon coronary thrombosis thrombosis coronaidd coronas corona coroner crwner coroner's inquest cwest crwner coroner's inquests cwest crwner coroners crwner corporal corporal corporal punishment cosb gorfforol corporal punishments cosb gorfforol corporals corporal corporate corfforaethol corporate act of worship cydaddoliad corporate culture diwylliant corfforaethol corporate cultures diwylliant corfforaethol corporate identity hunaniaeth gorfforaethol corporate image delwedd gorfforaethol corporate images delwedd gorfforaethol corporate state gwladwriaeth gorfforaethol corporate states gwladwriaeth gorfforaethol corporate worship cydaddoli corporation corfforaeth corporation tax treth gorfforaeth corporation taxes treth gorfforaeth corporations corfforaeth corpus corpws corpus callosum corpws caloswm corpus callosums corpws caloswm corpus cavernosum corpws cafernoswm corpus cavernosums corpws cafernoswm corpus luteum corpws lwtewm corpus luteums corpws lwtewm corpus spongiosum corpws spongioswm corpus spongiosums corpws spongioswm corpus striatum corpws striatwm corpus striatums corpws striatwm corpuscle corffilyn corpuscles corffilyn corral corlan corrals corlan corrasion cyrathiad corrasions cyrathiad correct cywir correct cywiro correct angle ongl gywir correct angles ongl gywir correct position safle cywir correct positions safle cywir correct proportion cyfrannedd cywir correct proportions cyfrannedd cywir correct sequence trefn gywir correct sequences trefn gywir correction cywiriad correction procedure trefn gywiro correction procedures trefn gywiro corrections cywiriad corrective reading darllen a chywiro correlate cydberthyn correlate cydberthyniad correlate cydberthynol correlates cydberthyniad correlation cydberthyniad correlation coefficient cyfernod cydberthyniad correlation coefficients cyfernod cydberthyniad correlation matrix matrics cydberthyniad correlation matrixes matrics cydberthyniad correlations cydberthyniad correspond cyfateb correspondence cyfatebiaeth (=similarity) correspondence gohebiaeth (=letters) correspondence course cwrs drwy'r post correspondence courses cwrs drwy'r post correspondence education addysg drwy'r post correspondence educations addysg drwy'r post correspondences cyfatebiaeth (=similarity) correspondences gohebiaeth (=letters) corresponding cyfatebol corresponding angles onglau cyfatebol corresponding sides ochrau cyfatebol corresponding society cymdeithas ohebu corridor coridor corridor kitchen cegin hirgul corridor kitchens cegin hirgul corridors coridor corrie peiran corries peiran corrode cyrydu corrosion cyrydiad corrosion inhibitor atalydd rhwd corrosion inhibitors atalydd rhwd corrosion of iron cyrydu haearn corrosion resistant gwrthgyrydiad corrosions cyrydiad corrosive cyrydol corrugated rhychiog corrugated card cerdyn rhychiog corrugated cards cerdyn rhychiog corrugated fastener ffasnydd rhychiog (wiggle nail) corrugated fastener hoelen rychiog corrugated fasteners ffasnydd rhychiog (wiggle nail) corrugated fasteners hoelen rychiog corrugated iron haearn rhychiog corrugated irons haearn rhychiog corrugated paper papur rhychiog corrugated papers papur rhychiog corrupt llygru corruption llygredd corruption of electronic information llygru gwybodaeth electronig corruptions llygredd corset staes corsets staes cortex cortecs cortexes cortecs corticosterone corticosteron corticosterones corticosteron corticotrophin corticotroffin corticotrophins corticotroffin cosecant cosecant (cosec) cosecants cosecant (cosec) cosech cosech coseches cosech cosh cosh coshs cosh cosine cosin (cos) cosines cosin (cos) cosmetics cosmetigau cosmic cosmig cosmological cosmolegol cosmological argument dadl gosmolegol cosmological arguments dadl gosmolegol cosmology cosmoleg cosmopolitan amlgenhedlig cost cost cost analysis dadansoddiad costau cost centre canolfan gost cost centres canolfan gost cost classification sheet taflen dosbarthu costau cost classification sheets taflen dosbarthu costau cost effectiveness effeithiolrwydd cost cost management rheoli costau cost of living index mynegai costau byw cost plus pricing prisio cost plws cost price pris cost cost prices pris cost cost push inflation chwyddiant cynnydd cost cost push inflations chwyddiant cynnydd cost cost-benefit analysis dadansoddiad cost a budd cost-effective cost effeithiol costal asennol costing costiad costings costiad costs cost costs line llinell y costau costs lines llinell y costau costume gwisg costumes gwisg cot crud cot death marwolaeth yn y crud cot deaths marwolaeth yn y crud cotangent cotangiad (cot) cotangents cotangiad (cot) coterminal cyd-derfynol coth coth coths coth cottage cheese caws colfran cottage cheeses caws colfran cottage industry diwydiant cartref cottage loom gwŷdd bwthyn cottage looms gwŷdd bwthyn cottage pie pastai'r bwthyn cottage pies pastai'r bwthyn cottar cotywr cottars cotywr cotter coter cotter pin pìn hollt cotter pins pìn hollt cotters coter cotton cotwm cotton apron ffedog gotwm cotton aprons ffedog gotwm cotton ball pellen gotwm cotton balls pellen gotwm cotton bandage rhwymyn cotwm cotton bandages rhwymyn cotwm cotton belt ardal gotwm cotton belts ardal gotwm cotton linters linteri cotwm cotton tape tâp cotwm cotton tapes tâp cotwm cotton thread edau gotwm cotton threads edau gotwm cotton twine cortyn cotwm cotton twines cortyn cotwm cotton waste gwastraff cotwm cotton wastes gwastraff cotwm cotton wool gwlân cotwm cotton wools gwlân cotwm cottonbud ffon gotwm cottonbuds ffon gotwm cottons cotwm cotyledon cotyledon cotyledons cotyledon couch grass marchwellt couching cowtsio couching pwyth gorwedd couchings pwyth gorwedd cough peswch cough pesychu coughs peswch coulomb coulomb coulombmeter coulombmedr coulombmeters coulombmedr coulombs coulomb coulter cwlltwr coulters cwlltwr council cyngor council estate stad cyngor council estates stad cyngor council house estate stad dai cyngor council house estates stad dai cyngor council on tribunals cyngor ar dribiwnlysoedd councillor cynghorydd councillors cynghorydd councils cyngor counsel cynghori counselling service gwasanaeth cynghori counselling services gwasanaeth cynghori counselling technique techneg gynghori counselling techniques techneg gynghori counsellor cynghorwr counsellor training hyfforddi cynghorwyr counsellors cynghorwr count cyfrif count out cyfrif allan count rate cyfradd cyfrif count rates cyfradd cyfrif countability rhifadwyedd countable rhifadwy countably infinite yn rhifadwy anfeidraidd counted thread stitch pwyth cyfrif edau counted thread stitches pwyth cyfrif edau counter gwrthiad (in sport) counter gwrthio (in sport) counter masnachdy (house) counter rhifydd (in computing) counter enamel enamel cefndir counter enamels enamel cefndir counter exposition gwrthddangosiad counter expositions gwrthddangosiad counter revolution gwrthchwyldro counter revolutions gwrthchwyldro counter riposte riposte gwrthol counter ripostes riposte gwrthol counter spit gwrthdafod counter spits gwrthdafod counter veneer gwrthargaen counter veneers gwrthargaen counter-attack gwrthymosodiad counter-attacks gwrthymosodiad counter-current gwrthgerrynt counter-current flow llif gwrthgerrynt counter-current flows llif gwrthgerrynt counter-currents gwrthgerrynt counter-example gwrthenghraifft counter-examples gwrthenghraifft counter-reformation gwrthddiwygiad counter-reformations gwrthddiwygiad counter-revolutionary gwrthchwyldroadol counter-urbanisation gwrthdrefoli counteract gwrthweithio counterbalance gwrthbwyso counterbalance gwrthgytbwys (ice snout) counterbalanced gwrthgytbwys counterbalances gwrthgytbwys (ice snout) counterbore gwrthdyllu counterbored hole twll gwrthfor counterbored holes twll gwrthfor counterchange gwrthgyfnewid counterchange gwrthgyfnewidiad counterchange design cynllun gwrthgyfnewid counterchange designs cynllun gwrthgyfnewid counterchange pattern patrwm gwrthgyfnewid counterchange patterns patrwm gwrthgyfnewid counterchanges gwrthgyfnewidiad counterfactor gwrthffactor counterfactors gwrthffactor counterflow gwrthlif counterflows gwrthlif counterfoil bonyn counterfoils bonyn countermelody cyfalaw counterpart gwrthran counterparts gwrthran counterpoint gwrthbwynt counterpoints gwrthbwynt counterproof gwrthbrawf counterproofs gwrthbrawf counters gwrthiad (in sport) counters masnachdy (house) counters rhifydd (in computing) countershading gwrthliwio countersink gwrthsoddi countersink gwrthsoddydd countersink bit ebill gwrthsoddi countersink bits ebill gwrthsoddi countersink drill dril gwrthsoddi countersink drills dril gwrthsoddi countersinks gwrthsoddydd countersunk gwrthsodd countersunk pengwrthsodd (machine screws) countersunk head bolt bollt ben gwrthsodd countersunk head bolts bollt ben gwrthsodd countersunk head rivet rhybed pen gwrthsodd countersunk head rivets rhybed pen gwrthsodd countersunk hole twll gwrthsodd countersunk holes twll gwrthsodd countersunk rivet rhybed gwrthsodd countersunk rivets rhybed gwrthsodd countersunk screw sgriw wrthsodd countersunk screws sgriw wrthsodd countertenor uwchdenor countertenors uwchdenor counterweight gwrthbwysyn counterweights gwrthbwysyn countess iarlles counting song cân gyfrif counting songs cân gyfrif country gwlad country gwledig country and western canu gwlad country and westerns canu gwlad country dance dawns wledig country dances dawns wledig country house plasty yn y wlad country houses plasty yn y wlad country rock craig gysefin country rocks craig gysefin country seat plas country seats plas country town tref wledig country towns tref wledig countryside cefn gwlad countryside area ardal wledig countryside areas ardal wledig countryside recreation adloniant cefn gwlad countryside recreations adloniant cefn gwlad countrysides cefn gwlad counts cyfrif county sir county committee pwyllgor sirol county committees pwyllgor sirol county community cymuned sirol county councillor cynghorydd sir county councillors cynghorydd sir county court llys sirol county court claim form ffurflen hawlio'r llys sirol county court claim forms ffurflen hawlio'r llys sirol county courts llys sirol county palatine iarllaeth balatin county palatines iarllaeth balatin county record office archifdy'r sir county record offices archifdy'r sir couple cwpl couple cyplu couple family teulu cwpl coupled cypledig coupler cyplydd coupler stop stop cyplu coupler stops stop cyplu couplers cyplydd couples cwpl couplet cwpled (in rondeau) couplets cwpled (in rondeau) coupling cyplydd coupling flange fflans gyplydd coupling flanges fflans gyplydd coupling of valves cyplysu falfiau couplings cyplydd coupon cwpon coupons cwpon courante courante courantes courante courgettes courgettes course cwrs course team tîm y cwrs course teams tîm y cwrs courses cwrs coursework gwaith cwrs courseworks gwaith cwrs court cwrt (in sport and historical) court llys (modern legal) court and country llys a gwlad court leet cwrt lit court leets cwrt lit court of competent jurisdiction llys ag awdurdod digonol court of protection llys gwarchod court of special jurisdiction llys awdurdod arbennig court poet bardd llys court poets bardd llys court-baron cwrt barwn court-barons cwrt barwn courtelle courtelle courtelles courtelle courtier gŵr llys courtiers gŵr llys courts cwrt (in sport and historical) courts llys (modern legal) courtyard iard courtyards iard covalency cofalens covalent cofalent covalent bond bond cofalent covalent bonds bond cofalent covariance cydamrywiad covariances cydamrywiad cove cildraeth covenant cyfamod covenants cyfamod cover clawr (of book etc) cover cyfro (in cricket) cover gorchudd (in general) cover gorchuddio (in general) cover ymdrin â (a topic) cover board bwrdd clawr cover boards bwrdd clawr cover crop cnwd gorchudd cover crops cnwd gorchudd cover drive dreif gyfar cover drives dreif gyfar cover note nodyn diogelu cover notes nodyn diogelu cover paper papur clawr cover papers papur clawr cover point cyfar cover points cyfar cover-land tir gorchudd cover-lands tir gorchudd coverage sylw (in media) coverages sylw (in media) covered button botwm gorchudd covered buttons botwm gorchudd coverlet cwrlid coverlets cwrlid covers clawr (of book etc) covers gorchudd (in general) coversine cyfersin coversines cyfersin coverslip arwydryn coverslips arwydryn coves cildraeth cow horn corn gwartheg cow horns corn gwartheg cow's tongue stake bonyn tafod buwch cow's tongue stakes bonyn tafod buwch cowbells clychau gwartheg cowl cwfl cowl collar coler cwfl cowl collars coler cwfl cowl neck gwddf cwfl cowl necks gwddf cwfl cowls cwfl cox cocs cox cocsio coxed four pedwar a chocs coxed pair pâr a chocs coxless four pedwar coxless fours pedwar coxless pair pâr coxless pairs pâr crab cranc crabs cranc crack crac crack cracio cracked enamel enamel cracellu cracked enamels enamel cracellu cracker cracydd crackers cracydd crackle cracellu cracks crac cradle crud cradle crudo (in metalwork) cradle V crud V cradle cap crudgen cradle caps crudgen cradle song hwiangerdd cradle songs hwiangerdd cradles crud cradling crudiad cradling piece darn crudiad (hearth) cradling pieces darn crudiad (hearth) cradlings crudiad craft bad (boat) craft crefft craft dye llifyn crefft craft dyes llifyn crefft craft guild gild crefft craft guilds gild crefft craft knife cyllell grefft craft knifes cyllell grefft craft paint paent crefft craft paints paent crefft craft process proses grefft craft skill sgìl crefft craft skills sgìl crefft crafts bad (boat) crafts crefft craftsman crefftwr craftsmans crefftwr craftsmanship crefftwriaeth craftsmanships crefftwriaeth craftworker crefftwr craftworkers crefftwr crag clegyr crag and tail clegyr a chynffon craggy clegyrog crags clegyr cramp cramp cramp crampio cramping action arwaith crampio cramping actions arwaith crampio cramping blocks blociau crampio crampon crampon crampons crampon cramps cramp cranberries llugaeron crane craen cranes craen cranial creuanol cranium creuan craniums creuan crank cranc crank pin crancbin crank pins crancbin crank pivot crancgolyn crank pivots crancgolyn crank spanner sbaner cranc crank spanners sbaner cranc cranked cam cranked centre hinge colfach canol camdro cranked centre hinges colfach canol camdro cranked handle dolen gamdro cranked handles dolen gamdro cranked palette knife cyllell balet gam cranked palette knifes cyllell balet gam cranks cranc crankshaft crancsiafft crankshafts crancsiafft crash chwalfa crash chwalu crash cwymp crash course cwrs carlam crash courses cwrs carlam crashs chwalfa crashs cwymp crate cawell crater crater craters crater crates cawell crating cawell crating cawellu cratings cawell craton tarian cratons tarian craving chwant cravings chwant crawfish cimwch coch crawfishs cimwch coch crawl cropian (of baby) crawl enamel enamel llusg crawl enamelling enamlo llusg crawl enamels enamel llusg crawling ymlusgo (glazing fault) crayfish cimwch yr afon (freshwater) crayfishs cimwch yr afon (freshwater) crayon creon crayon engraving ysgythriad creon crayon engravings ysgythriad creon crayon pencil pensil creon crayon pencils pensil creon crayons creon crazing cracellu cream hufen cream hufennu cream cracker bisged gracer cream crackers bisged gracer cream horn corn hufen cream horns corn hufen cream of tartar powdr tartar cream slice tafell hufen cream slices tafell hufen creaming method dull hufennu creaming methods dull hufennu creams hufen creamy hufennog creamy consistency ansawdd hufennog crease cris (in cricket) crease crych crease crychu crease recovery datgrychu crease-resistant gwrthgrych creases cris (in cricket) creases crych creasing hammer morthwyl crychu creasing hammers morthwyl crychu creasing stake bonyn crychu creasing stakes bonyn crychu creasing tool erfyn crychu creasing tools erfyn crychu create creu create characters creu cymeriadau create mode modd creu create modes modd creu creation creadigaeth creation date dyddiad creu creation dates dyddiad creu creations creadigaeth creative creadigol creative ability test prawf gallu creadigol creative ability tests prawf gallu creadigol creative approach agwedd greadigol creative approaches agwedd greadigol creative arts celfyddydau creadigol creative craftwork crefftwaith creadigol creative craftworks crefftwaith creadigol creative design cynllun creadigol creative designs cynllun creadigol creative expression mynegiant creadigol creative expressions mynegiant creadigol creative play chwarae creadigol creative response ymateb creadigol creative responses ymateb creadigol creative thinking meddwl creadigol creative work gwaith creadigol creative works gwaith creadigol creative writing ysgrifennu creadigol creativity creadigrwydd creativity test prawf creadigrwydd creativity tests prawf creadigrwydd creator creawdwr creators creawdwr credibility hygrededd credit credyd credit cyfrif yn gredyd credit accumulation casglu credydau credit agreement cytundeb credyd credit agreements cytundeb credyd credit buying prynu ar gredyd credit card cerdyn credyd credit cards cerdyn credyd credit control rheolaeth credyd credit control system system rheoli credyd credit control systems system rheoli credyd credit controller rheolwr credyd credit controllers rheolwr credyd credit controls rheolaeth credyd credit creation creu credyd credit exemption esgusodi rhag credyd credit note nodyn credyd credit notes nodyn credyd credit sale gwerthiant credyd credit sales gwerthiant credyd credit scheme cynllun credydau credit schemes cynllun credydau credit terms telerau credyd credit transfer trosglwyddiad credyd credit transfers trosglwyddiad credyd creditor credydwr creditors credydwr credits clodrestr (of names of people) credits credyd creed credo creeds credo creek cilfach (=inlet, bay) creek nant (in U.S.A) creeks cilfach (=inlet, bay) creeks nant (in U.S.A) creel rhesel sbwliau (spool rack) creels rhesel sbwliau (spool rack) creep ymgripiad (of soil) creep feeding didol borthi creep feeding of lambs didol borthi ŵyn bach creep feeding of suckling pigs didol borthi moch bach creeps ymgripiad (of soil) cremation amlosgiad cremations amlosgiad creosote oil olew creosot creosote oils olew creosot crepitation rhugliad crepitations rhugliad crescent cilgant crescent moon lleuad gilgant crescent moons lleuad gilgant crescentic cilgantaidd crescents cilgant cress berwr crest brig (of hill etc) crest crib (of bird) crested chain stitch pwyth cadwyn cribog crested chain stitches pwyth cadwyn cribog cresting arwydd crestings arwydd crests brig (of hill etc) crests crib (of bird) cretaceous cretasig cretinism cretinedd cretinisms cretinedd crevasse crefas crevasses crefas crevice tool teclyn corneli (vacuum tools) crevice tools teclyn corneli (vacuum tools) crewel needle nodwydd frodio crewel needles nodwydd frodio cricket criced cricket club clwb criced cricket clubs clwb criced cricket field maes criced cricket fields maes criced cricket shoe esgid griced cricket shoes esgid griced cricketer cricedwr cricketers cricedwr crickets criced crime trosedd crime scene analysis dadansoddiad safle trosedd crimes trosedd criminal troseddol criminal troseddwr criminal consistency hypothesis damcaniaeth cysondeb troseddau criminal justice cyfiawnder troseddol criminal justices cyfiawnder troseddol criminal law cyfraith trosedd criminal law and justice cyfraith troseddau a chyfiawnder criminal laws cyfraith trosedd criminal psychology seicoleg troseddu criminals troseddwr criminology troseddeg crimp crimpio crimson rhuddgoch (enamelling colour) crimson lake llif rhuddgoch crimson lakes llif rhuddgoch crimsons rhuddgoch (enamelling colour) crinkle crychu crinkled paper papur crych crinkled papers papur crych crisis argyfwng crisp claps clapio clir crispbread tafell gras crispbreads tafell gras crisps creision tatws criss-cross croesymgroes crista crista cristas crista criteria instrument offeryn meini prawf criteria instruments offeryn meini prawf criteria referencing cyfeirio at feini prawf criterion maen prawf criterion-referenced maen prawf gyfeiriol criterion-referenced assessment asesiad maen prawf gyfeiriol criterion-referenced assessments asesiad maen prawf gyfeiriol criterion-referenced test prawf maen prawf gyfeiriol criterion-referenced testing profi maen prawf gyfeiriol criterion-referenced tests prawf maen prawf gyfeiriol criterions maen prawf critic adolygydd (=reviewer) critic beirniad critical allweddol (=decisive, crucial) critical argyfyngus (of or at a crisis) critical beirniadol (of faculty) critical critigol (in mathematics and physics) critical and contextual studies astudiaethau beirniadol a chyd-destunol critical angle ongl critigol critical angles ongl critigol critical autonomy annibyniaeth feirniadol critical evaluation gwerthusiad beirniadol critical evaluations gwerthusiad beirniadol critical incident digwyddiad critigol critical incidents digwyddiad critigol critical learning period cyfnod dysgu allweddol critical learning periods cyfnod dysgu allweddol critical path analysis dadansoddiad llwybr critigol critical path method dull llwybr critigol (CPM) critical path methods dull llwybr critigol (CPM) critical point pwynt critigol critical points pwynt critigol critical range amrediad critigol critical ranges amrediad critigol critical ratio cymhareb gritigol critical region rhanbarth critigol critical regions rhanbarth critigol critical size maint critigol critical sizes maint critigol critical temperature tymheredd critigol critical temperatures tymheredd critigol criticism beirniadaeth criticisms beirniadaeth critics adolygydd (=reviewer) critics beirniad crochet crosio crochet gwaith crosio crochet hook bach crosio crochet hooks bach crosio crocheted lace les wedi'i grosio crocheted laces les wedi'i grosio crochets gwaith crosio crockery llestri crocus saffrwm crocus powder powdr crocws crocus powders powdr crocws croft crofft crofter crofftwr crofters crofftwr crofting system cyfundrefn grofftio crofting systems cyfundrefn grofftio crofts crofft crook bagl crooked grain graen cam crooked grains graen cam crooks bagl crop cnwd crop tocio (in photography) crop rotation cylchdro cnydau crop rotations cylchdro cnydau crops cnwd croquette croquette croquettes croquette crosier bagl crosiers bagl cross croes (in general) cross croesi cross croesiad (=act of crossing) cross banded plinth plinth bandin croes cross banded plinths plinth bandin croes cross banding bandin croes cross bandings bandin croes cross beam trawst cross beams trawst cross country traws gwlad cross country event cystadleuaeth draws gwlad cross country events cystadleuaeth draws gwlad cross country race ras draws gwlad cross country races ras draws gwlad cross cut trawstoriad cross cut trawstorri cross cuts trawstoriad cross elasticity trawselastigedd cross elasticity of demand trawselastigedd y galw cross feed trawsborthiant cross feeds trawsborthiant cross grain graen croes cross grains graen croes cross halving haneru croes cross halving joint uniad croes haneru cross halving joints uniad croes haneru cross hatching croeslinellu cross hey hai croes cross infection traws-heintiad cross infections traws-heintiad cross kick cic groes cross kicks cic groes cross member trawsaelod cross members trawsaelod cross multiply trawsluosi cross over trawsgroesiad cross overs trawsgroesiad cross peen wyneb croes cross peen hammer morthwyl wyneb croes cross peen hammers morthwyl wyneb croes cross peens wyneb croes cross piece darn croes cross pieces darn croes cross pollination trawsbeilliad cross pollinations trawsbeilliad cross profile trawsbroffil cross profiles trawsbroffil cross rail rheilen groes cross rails rheilen groes cross slide trawslithryn cross slides trawslithryn cross stitch pwyth croes cross stitches pwyth croes cross stretcher estynnwr croes cross stretchers estynnwr croes cross the goal line croesi'r llinell gôl cross the line croesi'r llinell cross tongue tafod croes cross tongues tafod croes cross wall croesfur cross walls croesfur cross wires croeswifrau cross-accent croesacen cross-accents croesacen cross-bedded trawshaenog cross-bedding trawshaenu cross-breeding croesfridio cross-channel boat cwch sianel cross-channel boats cwch sianel cross-compiler traws-grynhoydd cross-compilers traws-grynhoydd cross-contamination traws-halogiad cross-contaminations traws-halogiad cross-culture study astudiaeth drawsddiwylliannol cross-curricular trawsgwricwlaidd cross-curricular issue mater trawsgwricwlaidd cross-curricular issues mater trawsgwricwlaidd cross-curricular theme thema drawsgwricwlaidd cross-curricular themes thema drawsgwricwlaidd cross-curricularity trawsgwricwledd cross-cut chisel cŷn trawstor cross-cut chisels cŷn trawstor cross-cut darn craith trawstoriad cross-cut darns craith trawstoriad cross-cut saw trawslif cross-cut saws trawslif cross-feed lever lifer trawsborthiant cross-feed levers lifer trawsborthiant cross-fertilization trawsffrwythloni cross-filing croesffeilio cross-hair cursor cyrchwr traws cross-hair cursors cyrchwr traws cross-laterality trawsochredd cross-legged coesgroes (sitting) cross-link trawsgysylltiad cross-linkage trawsgyswllt cross-linkages trawsgyswllt cross-linking trawsgysylltu cross-links trawsgysylltiad cross-ratio cymhareb draws cross-rhythm trawsrythm cross-rhythms trawsrythm cross-section trawstoriad cross-sections trawstoriad crossbar croesfar crossbars croesfar crossbow bwa croes crossbows bwa croes crossed cheque siec wedi'i chroesi crossed cheques siec wedi'i chroesi crossing croesfan crossings croesfan crossway facing wynebyn croes crossway facings wynebyn croes crossway fold plyg croesraen crossway folds plyg croesraen crossway strip stribed croesraen crossway strips stribed croesraen crotales crotalau crotch seam sêm fforch crotch seams sêm fforch crotchet crosiet crotchets crosiet crouch cwrcwd (position) crouch cyrcydu crouch jump naid gwrcwd crouch jumps naid gwrcwd crouch-running rhedeg gwargam crouched burial claddu cwrcwd crouches cwrcwd (position) croute crwst croutes crwst crouton crouton croutons crouton crowbar trosol crowbars trosol crowd crwth (musical instrument) crowds crwth (musical instrument) crown corun (of the head) crown fitting line llinell ffitio pen crown fitting lines llinell ffitio pen crown guard gard uchaf crown guards gard uchaf crown land tir y goron crown lands tir y goron crown of sleeve pen llawes crown plate plât gwarchod crown plates plât gwarchod crown prosecution erlynydd y goron crown prosecutions erlynydd y goron crown rail rheilen warchod crown rails rheilen warchod crowns corun (of the head) crucible crwsibl crucible furnace ffwrnais grwsibl crucible furnaces ffwrnais grwsibl crucible steel dur crwsibl crucible steels dur crwsibl crucible tongs gefel grwsibl crucibles crwsibl crucifix croes crucifixes croes crucifixion croeshoeliad crucifixions croeshoeliad cruciform croesffurf cruck nenfforch cruck framed house tŷ ffrâm nenfforch cruck framed houses tŷ ffrâm nenfforch crucked nenffyrchog crucks nenfforch crude amrwd (=not adjusted or corrected) crude crai (=natural or raw state) crude birth / death rate cyfradd geni / marw syml crude birth / death rates cyfradd geni / marw syml crude oil olew crai crude oils olew crai cruiser llong ryfel gyflym cruisers llong ryfel gyflym crum horn crwmgorn crum horns crwmgorn crumb briwsionyn crumble briwsioni crumble cap cap inc clystyrog (fungus) crumble caps cap inc clystyrog (fungus) crumbly briwsionllyd crumbs briwsionyn crumpet cramwythen crumpets cramwythen crumple crychu crumple zone cywasgran crumple zones cywasgran crunchy creisionllyd crunode crwnod crunodes crwnod crusade croesgad crusades croesgad crush malu'n fân crush injury anaf mathru crushed enamel enamel mâl crushed enamels enamel mâl crusher malwr crushers malwr crust cramen crustacean cramennog crustaceans cramennog crustaceous cramennog crustal cramennol crustal plate plât cramennol crustal plates plât cramennol crusts cramen crutch bagl crutches bagl crwth crwth crwth player crythor crwth players crythor crwths crwth cryogenics cryogeneg cryolite cryolit cryolites cryolit cryopedology rhewbriddeg cryophil cryoffil cryophilic cryoffilig cryophils cryoffil cryoplanation rhew-wastadiant cryoplanations rhew-wastadiant cryoscopy cryosgopi cryptic cryptig cryptic coloration cêl-liwiad cryptic colorations cêl-liwiad cryptophyte cryptoffyt cryptophytes cryptoffyt crypts of Lieberkuhn cryptau Lieberkuhn crystabolite cristabolit crystabolites cristabolit crystal grisial crystalline grisialog crystalline glaze gwydredd grisialog crystalline glazes gwydredd grisialog crystalline lens lens grisialog crystalline pigment pigment grisialog crystalline pigments pigment grisialog crystalline structure ffurfiad grisialog crystalline structures ffurfiad grisialog crystallization grisialiad crystallizations grisialiad crystallize grisialu crystallized fruit ffrwythau grisialog crystallography grisialograffaeth crystals grisial crèche meithrinfa crèches meithrinfa crêpe crempog (=pancake) crêpe crêp (of paper) crêpe bandage rhwymyn crêp crêpe bandages rhwymyn crêp crêpe de chine crêpe de chine crêpe de chines crêpe de chine crêpe paper papur crêp crêpe papers papur crêp crêpes crempog (=pancake) crêpes crêp (of paper) cub cenau cube ciwb cube torri'n giwbiau cube root trydydd isradd cube roots trydydd isradd cube roots of unity trydydd israddau un cubes ciwb cubic ciwbig cubic close-packing pacio tyn ciwbig cubic equation hafaliad ciwbig cubic equations hafaliad ciwbig cubic metre metr ciwbig cubic metres metr ciwbig cubical ciwbigol cubism ciwbiaeth cubisms ciwbiaeth cubit cufydd cubits cufydd cuboid ciwboid cuboid epithelium epitheliwm ciwboid cuboid epitheliums epitheliwm ciwboid cuboids ciwboid cucumber ciwcymer cucumbers ciwcymer cuddle anwesu cuddly toy tegan anwes cue ciw (pool, snooker) cuff cyffen cufflink dolen lawes cufflinks dolen lawes cuffs cyffen cultic myth myth cyltig cultic myths myth cyltig cultivate trin (land) cultivated crop cnwd trin cultivated crops cnwd trin cultivation triniad cultivations triniad cultural diwylliannol cultural aspect agwedd ddiwylliannol cultural aspects agwedd ddiwylliannol cultural context cyd-destun diwylliannol cultural contexts cyd-destun diwylliannol cultural deprivation amddifadiad diwylliannol cultural deprivations amddifadiad diwylliannol cultural development datblygiad diwylliannol cultural developments datblygiad diwylliannol cultural diversity amrywiaeth ddiwylliannol cultural heritage etifeddiaeth ddiwylliannol cultural heritages etifeddiaeth ddiwylliannol cultural imperialism imperialaeth ddiwylliannol cultural imperialisms imperialaeth ddiwylliannol cultural landscape tirlun diwylliannol cultural landscapes tirlun diwylliannol cultural overlay troshaen ddiwylliannol culturalization diwylliannu culturally disadvantaged dan anfantais ddiwylliannol culture diwylliant (=customs etc) culture meithrin (bacteria etc) culture meithriniad (of bacteria etc) culture cells celloedd meithrin culture element elfen ddiwylliannol culture elements elfen ddiwylliannol culture medium cyfrwng meithrin culture mediums cyfrwng meithrin culture solution hydoddiant meithrin culture solutions hydoddiant meithrin culture tissues meinweoedd meithrin cultured diwylliedig (of person) cultures diwylliant (=customs etc) cultures meithriniad (of bacteria etc) cummerbund cummerbund cummerbunds cummerbund cumulative cronnus cumulative achievement record cofnod cyrhaeddiad cronnus cumulative achievement records cofnod cyrhaeddiad cronnus cumulative causation achosiaeth gronnus cumulative causations achosiaeth gronnus cumulative distribution function ffwythiant dosraniad cronnus cumulative distribution functions ffwythiant dosraniad cronnus cumulative frequency amlder cronnus cumulative frequency curve cromlin amlder cronnus cumulative frequency curves cromlin amlder cronnus cumulative frequency diagram diagram amlder cronnus cumulative frequency diagrams diagram amlder cronnus cumulative frequency distribution dosraniad amlder cronnus cumulative frequency distributions dosraniad amlder cronnus cumulative frequency graph graff amlder cronnus cumulative frequency graphs graff amlder cronnus cumulative frequency polygon polygon amlder cronnus cumulative frequency polygons polygon amlder cronnus cumulative hey hai cynnydd cumulative record cofnod cronnus cumulative records cofnod cronnus cumulative song cân gronnus cumulative songs cân gronnus cumulative spelling sillafu cronnus cumulative total cyfanswm cronnus cumulative totals cyfanswm cronnus cumulonimbus cwmwlonimbws cumulus cwmwlws cuneiform cynffurf cunning man dyn hysbys cunning mans dyn hysbys cup chuck crafanc gwpan cup chucks crafanc gwpan cup final gornest derfynol cup finals gornest derfynol cup handle dolen gwpan cup handles dolen gwpan cup shake hollt cwpan cup shakes hollt cwpan cup-tie gornest gwpan cup-ties gornest gwpan cupboard cwpwrdd cupboard bolt bollt gwpwrdd cupboard bolts bollt gwpwrdd cupboard lock clo cwpwrdd cupboard locks clo cwpwrdd cupboards cwpwrdd cupful cwpanaid cupfuls cwpanaid cupola cwpola cupola furnace ffwrnais gwpola cupola furnaces ffwrnais gwpola cupolas cwpola cupping cwpanu cupro-nickel nicel coprog cupro-nickels nicel coprog cupula cwpwla cupulas cwpwla curd ceuled curdle cawsio curds ceuled curds and whey ceuled a maidd cure caledu (glue) cure gofalaeth (of a curate) cure iachâd cures gofalaeth (of a curate) cures iachâd curfew hwyrgloch (bell) curfews hwyrgloch (bell) curing cochi (fish) curing cyweirio (leather) curing halltu (pork) curium curiwm (Cm) curiums curiwm (Cm) curl cwrl curl cyrlio curls cwrl curly brackets bachau cyrliog ({ }) currant cyrensen currant bread bara brith currant breads bara brith currants cyrensen currency arian cyfred current cerrynt current cyfredol current account cyfrif cyfredol current accounts cyfrif cyfredol current assets asedau cyfredol current balance clorian gerrynt (in physics) current balances clorian gerrynt (in physics) current band corlan gyfredol current bands corlan gyfredol current bedding llifhaenau current enquiry ymholiad cyfredol current font ffont cyfredol current fonts ffont cyfredol current liability rhwymedigaeth gyfredol current money arian treigl current nib pìn cyfredol current nibs pìn cyfredol current operation gweithred gyfredol current operations gweithred gyfredol current price pris cyfredol current prices pris cyfredol current rate cyfradd gyfredol current rates cyfradd gyfredol current standard safon gyfredol current standards safon gyfredol current variable newidyn cyfredol current variables newidyn cyfredol currents cerrynt curricular cwricwlaidd curricular experiences profiadau yn y cwricwlwm curriculum cwricwlwm curriculum leader arweinydd cwricwlwm curriculum leaders arweinydd cwricwlwm curriculum panel panel cwricwlwm curriculum panels panel cwricwlwm curriculum planning cynllunio'r cwricwlwm curriculum studies astudiaethau'r cwricwlwm curriculum time amser y cwricwlwm curriculum times amser y cwricwlwm curriculum vitae curriculum vitae curriculum vitaes curriculum vitae curriculums cwricwlwm curry cyri cursive rhedol cursive writing ysgrifennu sownd cursor cyrchwr cursor address cyfeiriad cyrchwr cursor position safle cyrchwr cursor positions safle cyrchwr cursors cyrchwr curtain llen curtain ring dolen llenni curtain rings dolen llenni curtain wall murlen curtain walls murlen curtains llen curtsy cyrtsi curvature crymedd curvatures crymedd curve cromlin (=curved line) curve crymu curve tro (=bend) curve of intersection cromlin groestoriad curved crom (with feminine nouns) curved crwm (with masculine nouns) curved area arwynebedd crwm curved areas arwynebedd crwm curved bodkin botgin crwm curved bodkins botgin crwm curved edge ymyl grom curved edges ymyl grom curved line llinell grom curved lines llinell grom curved open seam sêm agored grom curved open seams sêm agored grom curved rail rheilen grom curved rails rheilen grom curved scraper sgrafell grom curved scrapers sgrafell grom curved snips snipiwr crwm curved spit tafod crwm curved spits tafod crwm curved stretcher estynnwr crwm curved stretchers estynnwr crwm curved surface arwyneb crwm curved surfaces arwyneb crwm curved tinsnips snipiwr tun crwm curves cromlin (=curved line) curves tro (=bend) curvilinear cromlinog curvilinear decoration addurn cromlinog curvilinear decorations addurn cromlinog curvilinear trajectory taflwybr cromlinog cushion clustog cushion cover gorchudd clustog cushion covers gorchudd clustog cushions clustog cusp cwsb cusps cwsb custard cwstard custards cwstard custodian ceidwad custodians ceidwad custom arfer custom house tollty custom houses tollty custom of the manor arfer y faenor custom style arddull wedi’i addasu custom styles arddull wedi’i addasu customer cwsmer customer feedback adborth cwsmeriaid customer feedbacks adborth cwsmeriaid customer service gwasanaeth i gwsmeriaid customer service skill sgìl gwasanaeth i gwsmeriaid customer service skills sgìl gwasanaeth i gwsmeriaid customer services gwasanaeth i gwsmeriaid customers cwsmer customs arfer customs tollau customs and excise tollau tramor a chartref customs and excise officer swyddog tollau customs and excise officers swyddog tollau customs duty tolldal cut archoll (=wound) cut toriad (in general) cut torlun (=engraved block for printing) cut torri cut and paste torri a gludo cut and thrust trychu a gwanu cut at cheek trychu at foch cut at chest trychu at fynwes cut at flank trychu at ystlys cut at head trychu at ben cut clasp nail hoelen lorio cut clasp nails hoelen lorio cut door-lock torglo drws cut door-locks torglo drws cut glassware llestri gwydr cerfiedig cut nail torhoelen cut nails torhoelen cut off torri i ffwrdd cut on the thread torri ar yr edau cut out torri allan cut out on the bias torri ar y bias cut out on the cross torri ar y groes cut over trostorri cut paper papur wedi'i dorri cut papers papur wedi'i dorri cut shoot cyffyn a dorrwyd o blanhigyn cut shoots cyffyn a dorrwyd o blanhigyn cut shot trawsergyd cut shots trawsergyd cut stem coesyn a dorrwyd o blanhigyn cut stems coesyn a dorrwyd o blanhigyn cut surface arwyneb y toriad cut surfaces arwyneb y toriad cut tack hoelen fer cut tacks hoelen fer cut through torri trwodd cut-off torbwynt cut-off bay cilfae cut-offs torbwynt cutaneous croenol cuticle cwtigl cuticles cwtigl cutlery cyllyll a ffyrc cuts gostyngiadau cutter torrwr cutter bar bar torri cutter bars bar torri cutter block bloc torri cutter blocks bloc torri cutters torrwr cutting toriad (in botany) cutting action arwaith torri cutting actions arwaith torri cutting angle ongl dorri cutting angles ongl dorri cutting blade llafn torri cutting blades llafn torri cutting board bwrdd torri cutting boards bwrdd torri cutting clearance cliriad torri cutting clearances cliriad torri cutting edge ymyl dorri cutting edges ymyl dorri cutting fluid hylif torri cutting fluids hylif torri cutting gauge medrydd torri cutting gauges medrydd torri cutting iron llafn torri cutting irons llafn torri cutting knife cyllell dorri cutting knifes cyllell dorri cutting line llinell dorri cutting lines llinell dorri cutting list rhestr dorri cutting lists rhestr dorri cutting out paper papur torri allan cutting out papers papur torri allan cutting plane plân torri cutting planes plân torri cutting plate plât torri cutting plates plât torri cutting pliers gefelen dorri cutting press gwasg dorri cutting stroke strôc dorri cutting strokes strôc dorri cutting tools offer torri cutting wire gwifren dorri cutting wires gwifren dorri cutting-out scissors siswrn torri defnydd (for fabric) cuttings toriad (in botany) cuttlefish casting castio môr-gyllell cutwork torwaith cutworks torwaith cwm cwm (in Wales) cyanidin cyanidin cyanidins cyanidin cyanogen cyanogen cyanogens cyanogen cyanosis dulasedd cybernetic seibernetaidd cybernetics seiberneteg cycle cylch (of songs, poems) cycle cylchred (in physics etc) cycle of disadvantage cylch anfantais cycle of erosion cylchred erydu cycle of fifths cylch pumedau cycles cylch (of songs, poems) cycles cylchred (in physics etc) cyclic cylchol (in chemistry, music) cyclic seiclig (in biology) cyclic AMP AMP cylchol cyclic group grŵp cylchol cyclic groups grŵp cylchol cyclic mass offeren gylch cyclic quadrilateral pedrochr cylchol cyclic quadrilaterals pedrochr cylchol cyclical cylchol cyclical unemployment diweithdra cylchol cyclical unemployments diweithdra cylchol cycling cylchynu cyclohexane cylchohecsan cyclohexanes cylchohecsan cycloid cylchoid cycloidal curves cromliniau cylchoidol cycloidal gear tooth dant gêr cylchoidol cycloidal gear tooths dant gêr cylchoidol cycloids cylchoid cyclomatic number rhif seiclomatig cyclomatic numbers rhif seiclomatig cyclone seiclon cyclones seiclon cyclorama seiclorama cycloramas seiclorama cyclostome seiclostom cyclostomes seiclostom cyclosymmetry cylchgymesuredd cyclotherm cylchtherm cyclotron cylchotron cyclotrons cylchotron cylchoalkane cylchoalcan cylchoalkanes cylchoalcan cylchoalkene cylchoalcen cylchoalkenes cylchoalcen cylinder silindr cylinder vacuum cleaner sugnwr llwch silindr cylinder vacuum cleaners sugnwr llwch silindr cylinders silindr cylindrical silindrog cylindrical core craidd silindrog cylindrical cores craidd silindrog cylindrical cuffs cyffiau silindrog cylindrical development datblygiad silindrog cylindrical developments datblygiad silindrog cylindrical former ffurfydd silindrog cylindrical formers ffurfydd silindrog cylindrical projection tafluniad silindrog cylindrical projections tafluniad silindrog cylindroid silindroid cylindroids silindroid cymatogenic symatogenig cymbal symbal cymbals symbal cyst coden cysteine cystein cysteines cystein cystic cystig cystic pledrennol (medical) cystic fibrosis ffibrosis y bledren cystine cystin cystines cystin cystitis llid y bledren cysts coden cytokinesis cytocinesis cytokinin cytocinin cytokinins cytocinin cytology cytoleg cytoplasm cytoplasm cytoplasms cytoplasm cytosol cytosol cytosols cytosol cytosome cytosom cytosomes cytosom cytotoxic drug cyffur cytotocsig cytotoxic drugs cyffur cytotocsig dab dab dab dabio dabbed resist gwrthydd dabio dabbed resists gwrthydd dabio dado dado dado joint uniad dado dado joints uniad dado dagger dagr daggers dagr daily change newid beunyddiol daily changes newid beunyddiol daily cleaning glanhau dyddiol daily collective worship cydaddoliad dyddiol daily collective worships cydaddoliad dyddiol daily living activities gweithgareddau byw bob dydd daily office gwasanaeth beunyddiol daily offices gwasanaeth beunyddiol daily task tasg ddyddiol daily tasks tasg ddyddiol dairy llaethdy dairy farm fferm laeth dairy farms fferm laeth dairy industry diwydiant llaethdy dairy products cynnyrch llaeth dais esgynlawr daisy-wheel olwyn argraffu daisy-wheel printer argraffydd olwyn daisy-wheel printers argraffydd olwyn daisy-wheels olwyn argraffu dam argae dam cronni damage difrod damage difrodi damage to the ozone layer difrod i'r haen oson damages difrod damages iawndal (=compensation) damascene damasgin damascene damasgu damascenes damasgin damask damasg damasks damasg dame school ysgol hen ferch dame schools ysgol hen ferch dammed lake cronlyn dammed lakes cronlyn damp gwanychu (a sound) damp llaith damp lleithder damp storage storfa laith damp storages storfa laith damp-proof course cwrs gwrthleithder (D.P.C.) damp-proof courses cwrs gwrthleithder (D.P.C.) damped gwanychol (of sound) damped oscillation osgiliad gwanychol damped oscillations osgiliad gwanychol damped vibration dirgryniad gwanychol damped vibrations dirgryniad gwanychol dampen lleithio damper damper (=shock absorber) dampers damper (=shock absorber) damping gwanychiad (of sound) dampings gwanychiad (of sound) dampness lleithder damps lleithder damsons eirin duon dana dana danas dana dance dawns (form or motion) dance dawns (occasion) dance dawnsio dance composition cyfansoddiad dawns dance compositions cyfansoddiad dawns dance figure ffigur dawns dance figures ffigur dawns dance form ffurf dawns dance forms ffurf dawns dance freely dawnsio'n rhydd dance movement symudiad dawns dance movements symudiad dawns dance on the spot dawnsio yn yr unfan dance routine dawnsdrefn dance routines dawnsdrefn dance-band band dawns dance-bands band dawns dances dawns (form or motion) dances dawns (occasion) dandruff cen ar y pen dandruffs cen ar y pen danger area llain waharddedig (on playing field) danger areas llain waharddedig (on playing field) dangerous play chwarae peryglus dangling hongian yn rhydd dariole mould mowld dariol dariole moulds mowld dariol dark tywyll dark brown brown tywyll (enamelling colour) dark browns brown tywyll (enamelling colour) dark colour lliw tywyll dark colours lliw tywyll dark figure ffigur tywyll dark figures ffigur tywyll dark green gwyrdd tywyll (enamelling colour) dark greens gwyrdd tywyll (enamelling colour) dark purple porffor tywyll (tempering colour) dark purples porffor tywyll (tempering colour) dark ruby rhuddliw tywyll (enamelling colour) dark straw melyn tywyll (tempering colour) dark straws melyn tywyll (tempering colour) dark tone tôn tywyll (of colour) dark tones tôn tywyll (of colour) darkness tywyllwch darn craith darn trwsio darning hoop cylch creithio darning hoops cylch creithio darning needle nodwydd greithio darning needles nodwydd greithio darns craith dart dart dart gwibio dart perforation twll dart dart perforations twll dart dart slash toriad dart dart slashs toriad dart darts dart dash llinell doriad (in computing) dashed line llinell doredig dashed lines llinell doredig dashs llinell doriad (in computing) data data data bank banc data data banks banc data data capture cipio data data channel sianel ddata data channels sianel ddata data collection casglu data (act of) data controller rheolydd data data controllers rheolydd data data density dwysedd data data dictionary geiriadur data data encryption amgryptio data data entering mewnbynnu data data entry cofnod data data file ffeil ddata data files ffeil ddata data flow diagram diagram llif data data flow diagrams diagram llif data data format fformat data data formats fformat data data independence annibyniaeth data data independences annibyniaeth data data item eitem o ddata data items eitem o ddata data logging logio data data manipulation language iaith trin data (DML) data manipulation languages iaith trin data (DML) data model model data data models model data data portability cludadwyedd data data preparation paratoi data data preparation operator gweithredwr paratoi data data preparation operators gweithredwr paratoi data data processing prosesu data data processing department adran brosesu data data processing departments adran brosesu data data processing supervisor goruchwyliwr prosesu data data processing supervisors goruchwyliwr prosesu data data protection gwarchod data data representation cynrychioliad data data representations cynrychioliad data data retrieval adalw data data set set ddata data sets set ddata data sheet dalen ddata data sheets dalen ddata data storage storio data (act of) data structure strwythur data data structures strwythur data data transfer trosglwyddo data data transfer rate cyfradd trosglwyddo data data transfer rates cyfradd trosglwyddo data data transmission trawsyrru data (act of) data type math data data types math data data validation dilysu data (act of) data verification gwireddu data data-handling package pecyn trin data data-handling packages pecyn trin data data-response task tasg ymateb i ddata data-response tasks tasg ymateb i ddata database cronfa ddata database management rheolaeth cronfeydd data database management system system rheoli cronfeydd data database management systems system rheoli cronfeydd data database managements rheolaeth cronfeydd data databases cronfa ddata date datysen (=type of fruit) date dyddiad (on calendar) dated dyddiedig (=containing the date) dated wedi dyddio (=old-fashioned) dates datysen (=type of fruit) dates dyddiad (on calendar) datum datwm datum edge ymyl datwm datum edges ymyl datwm datum face wyneb datwm datum faces wyneb datwm datum line llinell ddatwm datum lines llinell ddatwm datum side ochr ddatwm datum sides ochr ddatwm datums datwm daughter cell epilgell daughter cells epilgell daughter centriole epilgentriol daughter centrioles epilgentriol daughter house cangen (of nunnery) daughter houses cangen (of nunnery) daughter isotope epilisotop daughter isotopes epilisotop daughter nucleus epilgnewyllyn daughter nuclide epilniwclid daughter nuclides epilniwclid daughter product epilgynnyrch daughter products epilgynnyrch day diwrnod (=period of 24 hours) day dydd (with named days and as opposed to night) day and night dydd a nos day book dyddlyfr day books dyddlyfr day care gofal dydd day cares gofal dydd day centre canolfan ddydd day centres canolfan ddydd day hospital ysbyty dydd day hospitals ysbyty dydd day nursery meithrinfa ddydd day of the March dydd Mers day room ystafell ddydd day rooms ystafell ddydd day shift shifft dydd day shifts shifft dydd day visitor ymwelydd undydd day visitors ymwelydd undydd day-neutral dydd-niwtral day-work gwaith dydd day-works gwaith dydd daylight golau dydd daylight factor ffactor golau dydd daylight factors ffactor golau dydd daylights golau dydd days of notification diwrnodau o rybudd de Moivre's theorem theorem de Moivre de Moivre's theorems theorem de Moivre de-Stalinization dadstalineiddio de-airing datawyru de-waxing digwyro deacon diacon deaconess diacones deacons diacon dead ball pêl farw dead ball line llinell gwsg dead ball lines llinell gwsg dead balls pêl farw dead cell cell farw dead cells cell farw dead centre canol llonydd dead centres canol llonydd dead heat ras gyfartal dead heats ras gyfartal dead knot cainc farw dead knots cainc farw dead record cofnod marw dead records cofnod marw dead shore ateg unionsyth dead shores ateg unionsyth dead size union faint dead sizes union faint dead smooth file ffeil orlefn dead smooth files ffeil orlefn dead wood pren marw dead woods pren marw deadbeat curiad stond (of mechanism) deadbeats curiad stond (of mechanism) deadline terfyn amser deadlines terfyn amser deadlock llwyrglo (=type of lock) deadlock sefyllfa ddiddatrys (=impasse) deadlocks llwyrglo (=type of lock) deadlocks sefyllfa ddiddatrys (=impasse) deadweight tonnage tunelledd llwyth deadweight tonnages tunelledd llwyth deaf byddar deaf child plentyn byddar deaf childs plentyn byddar deafness byddardod deal bargen deal delio dealing with customers delio â chwsmeriaid deals bargen deaminase dadaminas deaminases dadaminas deaminate dadamineiddio deamination dadamineiddiad deaminations dadamineiddiad dean deon deanery deondy deans deon dearcuate delta delta bwaog dearcuate deltas delta bwaog death marwolaeth death certificate tystysgrif marwolaeth death certificates tystysgrif marwolaeth death duty toll farwolaeth death grant grant marwolaeth death grants grant marwolaeth death penalty cosb eithaf death rate cyfradd marwolaethau death rates cyfradd marwolaethau death warrant gwarant dienyddio death warrants gwarant dienyddio deaths marwolaeth deathwatch beetle ticbryf deathwatch beetles ticbryf debasement llygriad (of coinage) debasements llygriad (of coinage) debate dadl debates dadl debility llesgedd debit debyd debit debydu debit account cyfrif debyd debit accounts cyfrif debyd debit interest llog ar ddebyd debit interests llog ar ddebyd debits debyd deblocking dadflocio debouncing dadadlamu debridement digramennu debris malurion (=detritus) debris rwbel (=man-made rubble etc) debt dyled debt crisis argyfwng dyledion debtor dyledwr debtors dyledwr debts dyled debugger dadfygiwr debuggers dadfygiwr debugging dadfygio decade degawd decadence dirywiaeth (in art etc) decadences dirywiaeth (in art etc) decades degawd decagon decagon decagons decagon decalcification datgalchiad decalcifications datgalchiad decalcify datgalchu decalescent point pwynt caledu decalescent points pwynt caledu decani decani decanis decani decant ardywallt decarbonize datgarboneiddio decarboxylate datgarbocsyleiddio decay dadfeiliad (in chemistry and radioactive) decay dadfeilio (in chemistry and radioactive) decay pydredd (in biology) decay pydru (in biology) decay chain cadwyn bydredd decay chains cadwyn bydredd decay constant cysonyn dadfeilio decay constants cysonyn dadfeilio decay series cyfres ddadfeiliad decayed tooth dant wedi pydru decayed tooths dant wedi pydru deceive twyllo decelerate arafu deceleration arafiad decelerations arafiad decentralization datganoliad decentralizations datganoliad decentralize datganoli deceptive cadence diweddeb annisgwyl deceptive cadences diweddeb annisgwyl decibel desibel decibels desibel decide penderfynu deciduous collddail deciduous tooth dant cyntaf deciduous tooths dant cyntaf deciduous tree coeden gollddail deciduous trees coeden gollddail deciduous woodland coetir collddail deciduous woodlands coetir collddail decile degradd decile point pwynt degradd decile points pwynt degradd deciles degradd decilitre decilitr decilitres decilitr decimal degol decimal degolyn decimal coinage arian degol decimal fraction ffracsiwn degol decimal fractions ffracsiwn degol decimal notation nodiant degol decimal notations nodiant degol decimal place lle degol decimal places lle degol decimal point pwynt degol decimal points pwynt degol decimal system system ddegol decimal systems system ddegol decimalize degoli decimals degolyn decimation degymu (=exaction of tithes) decimation dinistrio (=destruction) decimetre decimetr decimetres decimetr decision penderfyniad decision box blwch penderfyniad decision boxes blwch penderfyniad decision making penderfynu decision making process proses benderfynu decision table tabl penderfyniad decision tables tabl penderfyniad decision tree coeden benderfyniadau decision trees coeden benderfyniadau decisions penderfyniad deck dec decks dec declaim traethu declaration datganiad declaration of war cyhoeddi rhyfel declarations datganiad declare datgan declare an interest cyhoeddi diddordeb declare the innings closed cau'r batiad declination gogwyddiad declinations gogwyddiad decline dirywiad (=deterioration) decline gostyngiad (=decrease in price etc) declines dirywiad (=deterioration) declines gostyngiad (=decrease in price etc) declining industry diwydiant sy'n dirywio declivity goriwaered decoder datgodiwr decoders datgodiwr decollator decoladydd decollators decoladydd decolonize dad-drefedigaethu decolourize dadliwio decompose dadelfennu decomposer dadelfennydd decomposers dadelfennydd decomposition dadelfeniad decomposition method dull dadelfennu decomposition methods dull dadelfennu decomposition of azomethane dadelfeniad asomethan decompositions dadelfeniad decompress datgywasgu decompression datgywasgiad decompressions datgywasgiad deconstruct dadadeiladu decontaminate dadlygru decontrol dadreoli decorate addurno decorated addurnedig decorating punch pwnsh addurno decorating punches pwnsh addurno decoration addurn decorations addurn decorative addurnol decorative art celfyddyd addurnol decorative arts celfyddyd addurnol decorative chamfer siamffer addurnol decorative chamfers siamffer addurnol decorative container cynhwysydd addurnol decorative containers cynhwysydd addurnol decorative details manylion addurnol decorative finish gorffeniad addurnol decorative finishs gorffeniad addurnol decorative hem hem addurnol decorative hems hem addurnol decorative panel panel addurnol decorative panels panel addurnol decorative process proses addurnol decorative relief cerfwedd addurnol decorative reliefs cerfwedd addurnol decorative seam sêm addurnol decorative seams sêm addurnol decorative stitch pwyth addurnol decorative stitches pwyth addurnol decorative technique techneg addurnol decorative techniques techneg addurnol decorative through dovetail joint uniad cynffonnog trwodd addurnol decorative through dovetail joints uniad cynffonnog trwodd addurnol decorative unit uned addurnol decorative units uned addurnol decorative veneer argaen addurnol decorative veneers argaen addurnol decouple dadgyplu decrease gostwng pwythau (in knitting) decrease lleihad decrease lleihau decrease through back of stitch cyfyngu drwy gefn y pwyth decreases lleihad decreasing gostyngol (in economics) decreasing lleihaol (in general) decreasing cost cost ostyngol decreasing costs cost ostyngol decree archddyfarniad (in courts of law) decree archddyfarnu (in courts of law) decree ordeinio (=order) decree ordinhad (=official order) decree nisi archddyfarniad amodol decree nisis archddyfarniad amodol decrees archddyfarniad (in courts of law) decrees ordinhad (=official order) decrement gostwng (act of decreasing) decrement gostyngiad (=ratio or amount lost) decrement lleihad (=decrease) decrements gostyngiad (=ratio or amount lost) decrements lleihad (=decrease) decrepitate clindarddach decretal decretal decretals decretal decryption dadgryptio decumbent gorweddol decurion dengwriad decurions dengwriad decurrent llorestynnol decussate croesedig dedendum circle cylch dedendwm dedendum circles cylch dedendwm dedicate cyflwyno (a book, music etc) dedicate cysegru (a church) dedicated computer cyfrifiadur un pwrpas dedicated computers cyfrifiadur un pwrpas dedicated register cofrestr un pwrpas dedicated registers cofrestr un pwrpas dedicated word processor prosesydd geiriau un pwrpas dedicated word processors prosesydd geiriau un pwrpas dedication cyflwyniad (of book, music etc) dedication cysegriad (of church) dedications cyflwyniad (of book, music etc) dedications cysegriad (of church) deduce diddwytho (technical usage) deduce that diddwythwch (imperative) deduct didynnu (in arithmetic) deduction casgliad (=inference, conclusion drawn) deduction diddwythiad (theory) deduction didyniad (in arithmetic) deduction tynnu (of money) deductions casgliad (=inference, conclusion drawn) deductions diddwythiad (theory) deductions didyniad (in arithmetic) deductive proof prawf diddwythol deductive proofs prawf diddwythol deed gweithred deed of partnership gweithred partneriaeth deeds gweithred deep dwfn deep Naples yellow melyn dwfn Napoli deep Naples yellows melyn dwfn Napoli deep chrome yellow melyn crôm dwfn deep chrome yellows melyn crôm dwfn deep end of the bath pen dwfn y baddon deep fat frying ffrio dwfn deep freeze cabinet cwpwrdd rhew deep freeze cabinets cwpwrdd rhew deep freeze chest rhewgist deep freeze chests rhewgist deep lemon yellow melyn lemwn dwfn deep lemon yellows melyn lemwn dwfn deep litter gwasarn (for hens) deep litters gwasarn (for hens) deep mid wicket canolwr wiced bell deep mid wickets canolwr wiced bell deep saw llif dwfn deep sea fishing pysgota'r cefnfor deep square leg coeswr pell sgwâr deep square legs coeswr pell sgwâr deep sunken wedi'i suddo'n ddwfn deep throat G cramp cramp G dyfnwddf deep throat G cramps cramp G dyfnwddf deepen dyfnhau defamation difenwad defamations difenwad default diofynnu defaulter methdalwr defaulters methdalwr defeat trechu defeatist gwangalon defeatist gwangalonnwr (of person) defeatists gwangalonnwr (of person) defecate ymgarthu defecation ymgarthiad defecations ymgarthiad defect diffyg (=imperfection) defect gwrthgilio defect nam (physical) defective diffygiol (=imperfect) defective gwallus (=faulty) defector gwrthgiliwr defectors gwrthgiliwr defects diffyg (=imperfection) defects nam (physical) defence amddiffyn (in sport) defence amddiffynfa (=fortifications) defence amddiffyniad (=justification in response to accusation) defences amddiffyn (in sport) defences amddiffynfa (=fortifications) defences amddiffyniad (=justification in response to accusation) defend amddiffyn defend off the front leg amddiffyn oddi ar y droed flaen defend the goal amddiffyn y gôl defend the wicket amddiffyn y wiced defendant diffynnydd defendants diffynnydd defender cefnwr (in soccer, rugby) defenders cefnwr (in soccer, rugby) defensible space gwagle amddiffynnol defensible spaces gwagle amddiffynnol defensive amddiffynnol defensive bowling bowlio amddiffynnol defensive shot ergyd amddiffynnol defensive shots ergyd amddiffynnol defensive stroke ergyd amddiffynnol defensive strokes ergyd amddiffynnol deference parch deferences parch deferred confluence cydlifiad gohiriedig deferred confluences cydlifiad gohiriedig deferred payment tâl gohiriedig deferred payments tâl gohiriedig deficiency diffyg (=lack, deficit) deficiency characteristic nodwedd diffyg deficiency characteristics nodwedd diffyg deficiency disease clefyd diffyg deficiency diseases clefyd diffyg deficiency payment tâl diffyg deficiency payments tâl diffyg deficiency symptom symptom diffyg deficiency symptoms symptom diffyg deficient diffygiol deficit diffyg deficits diffyg defile cyfyng (=narrow passage) defiles cyfyng (=narrow passage) define diffinio definite pendant definite integral integryn pendant definite integrals integryn pendant definiteness pendantrwydd definition diffiniad definitions diffiniad deflagrating spoon llwy ffaglu deflagrating spoons llwy ffaglu deflate dadchwyddo (in economics) deflate dadchwythu (in physics) deflate gollwng aer allan (a tyre etc) deflated dadchwythedig deflation dadchwyddiant (in economics) deflation dadchwythiad (in physics / geology) deflations dadchwyddiant (in economics) deflations dadchwythiad (in physics / geology) deflect allwyro (in physics) deflect the ball gwyro'r bêl deflecting allwyriadol deflecting field maes allwyriadol deflecting fields maes allwyriadol deflection allwyriad deflections allwyriad deflocculate datglystyru deflocculation datglystyriad deflocculations datglystyriad defoaming diewynnu defoliate diddeilio deforestate datgoedwigo deform anffurfio deformation anffurfiad deformations anffurfiad deformity anffurfiad defraud twyllo defrost dadrewi defuzzification dadniwlo degassing dinwyo degassing plunger plymiwr dinwyo degassing plungers plymiwr dinwyo degassing tablet tabled ddinwyo degassing tablets tabled ddinwyo degeneracy dirywiad degenerate dirywiedig degenerate dirywio degenerating dirywiol degenerative disease clefyd dirywiol degenerative diseases clefyd dirywiol deglaciation dadrewlifiant deglaciations dadrewlifiant deglutition llyncu degradation diraddiad degradations diraddiad degrade diraddio degraded diraddedig degreasant datseimydd degreasants datseimydd degrease datseimio degree gradd degree exercise cyfansoddiad gradd degree exercises cyfansoddiad gradd degree of dissociation gradd ddaduno degree of pitch serthiant degrees gradd degrees of freedom graddau rhyddid degrees of the scale graddau'r raddfa dehisce ymagor dehiscent ymagorol dehorning digornio dehumanize dad-ddyneiddio dehydrate dadhydradu dehydrated dadhydredig dehydration dadhydradiad (of food) dehydration diffyg hylif (of person) dehydration agent dadhydradydd dehydration agents dadhydradydd dehydrations dadhydradiad (of food) dehydrations diffyg hylif (of person) dehydrogenase dadhydrogenas dehydrogenase activity gweithgaredd dadhydrogenas dehydrogenases dadhydrogenas dehydrogenate dadhydrogenu dehydrogenation dadhydrogeniad dehydrogenations dadhydrogeniad deism dëistiaeth deisms dëistiaeth delamination dadlaminadu delay oedi delay oediad delay line llinell oedi delay lines llinell oedi delayed riposte riposte oediog delayed ripostes riposte oediog delayed speech hwyr yn siarad delayer dihaenu (in order to simplify) delegate cynrychiolydd delegate dirprwyo delegate the management of dirprwyo rheolaeth delegated budget cyllideb ddirprwyedig delegated budgets cyllideb ddirprwyedig delegated expenditure gwariant dirprwyedig delegated expenditures gwariant dirprwyedig delegated item eitem ddirprwyedig delegated items eitem ddirprwyedig delegated legislation deddfwriaeth ddirprwyedig delegated legislations deddfwriaeth ddirprwyedig delegated power pŵer dirprwyedig delegated powers pŵer dirprwyedig delegates cynrychiolydd delegation dirprwyaeth delegation of budgets dirprwyo cyllidebau delegation of requirements dirprwyo gofynion delegations dirprwyaeth delete dileu delete key dilëwr deletion dilead deletions dilead delicate cain (=finely beautiful) delicate eiddil (=frail) delicate main (fabric) delicate ysgafn (of touch) delimit amffinio delimiter amffinydd delimiters amffinydd delinquency tramgwyddaeth delinquent tramgwyddus delinquent tramgwyddwr delinquent behaviour ymddygiad tramgwyddus delinquent behaviours ymddygiad tramgwyddus delinquents tramgwyddwr deliquescence gwlybyredd deliquescences gwlybyredd deliquescent gwlybyrol delirium deliriwm deliriums deliriwm delivery genedigaeth (of a baby) delivery date dyddiad trosglwyddo delivery dates dyddiad trosglwyddo delivery note nodyn trosglwyddo delivery notes nodyn trosglwyddo delivery tube tiwb cludo delivery tubes tiwb cludo delocalization dadleoliad delocalizations dadleoliad delocalize dadleoli delocalized dadleoledig delta delta deltaic deltaidd deltas delta deltoid ridge crib ddeltoid deltoid ridges crib ddeltoid delusion rhithdyb delusions rhithdyb delustre diloywi dem dem demagnetize dadfagneteiddio demagogue demagog demagogues demagog demand galw demand galw (in economics) demand hawlio (in general) demand curve cromlin galw demand curves cromlin galw demand feeding bwydo ar alw demand pull inflation chwyddiant cynnydd galw demand pull inflations chwyddiant cynnydd galw demanded quantity maint y galw (in economics) demands galw dematerialize difateroli dementia dementia dementias dementia demerit dirinwedd (of goods) demersal fishing pysgota'r gwaelod demesne demen demesnes demen demi semiquaver chwarter cwafer demi semiquavers chwarter cwafer demi-cadence diweddeb amherffaith demi-cadences diweddeb amherffaith demilitarize dadfilwrio demilitarized zone ardal ddadfilwroledig demilitarized zones ardal ddadfilwroledig demise by will cymynaeth democracy democratiaeth democrat democrat democratic democrataidd democratic leader arweinydd democrataidd democratic leaders arweinydd democrataidd democrats democrat demodulate dadfodiwliad demodulates dadfodiwliad demodulator dadfodylydd demodulators dadfodylydd demographic demograffig demographic change newid demograffig demographic changes newid demograffig demographic characteristic nodwedd ddemograffig demographic characteristics nodwedd ddemograffig demographic revolution chwyldro demograffig demographic revolutions chwyldro demograffig demographic structure strwythur demograffig demographic structures strwythur demograffig demographic transition trawsnewid demograffig demographic transitions trawsnewid demograffig demographic trend tuedd ddemograffig demographic trends tuedd ddemograffig demographics demograffeg demography demograffeg demolish chwalu demolition order gorchymyn chwalu demolition orders gorchymyn chwalu demon cythraul demons cythraul demonstrate arddangos (=show) demonstrate gwrthdystio (=protest) demonstration arddangosiad (=show) demonstration gwrthdystiad (=protest) demonstration lesson gwers enghreifftiol demonstration lessons gwers enghreifftiol demonstration program rhaglen arddangos demonstration programs rhaglen arddangos demonstrations arddangosiad (=show) demonstrations gwrthdystiad (=protest) demutualization datgilyddu denary degaidd denary number rhif degaidd denary numbers rhif degaidd denationalize dadwladoli denaturation dadnatureiddiad denaturations dadnatureiddiad denature dadnatureiddio denatzification dadnatsieiddio dendrite dendrid dendrites dendrid dendritic canghennog dendrochronology dendrocronoleg denervate dadnerfogi denier denier deniers denier denim denim denims denim denitrification dadnitreiddiad denitrifications dadnitreiddiad denitrify dadnitreiddio denitrifying bacteria bacteria dadnitreiddio denizenship dinasyddiaeth denizenships dinasyddiaeth denomination enwad (of religion) denominational religious education addysg grefyddol enwadol denominational religious educations addysg grefyddol enwadol denominational school ysgol enwadol denominational schools ysgol enwadol denominations enwad (of religion) denotation dynodiad denotations dynodiad denote dynodi dense dwys (of sound quality, in physics etc) dense trwchus (of bush etc) dense growth tyfiant trwchus dense growths tyfiant trwchus density dwysedd density gradient centrifugation allgyrchu graddiant dwysedd density independent factor ffactor annibynnol ar ddwysedd density independent factors ffactor annibynnol ar ddwysedd dent tolc dent tolcio dentage dentiad (of heddle) dentages dentiad (of heddle) dental deintiol dental brace ffrâm ddannedd dental braces ffrâm ddannedd dental decay pydredd dannedd dental floss edau ddeintiol dental formula patrwm dannedd dental formulas patrwm dannedd dental plaque plac deintiol dental plaques plac deintiol denticle deintigl denticles deintigl dentine dentin dentines dentin denting dentio dentist deintydd dentistry deintyddiaeth dentists deintydd dents tolc dentures dannedd gosod denudation treuliant denudation chronology cronoleg treuliant denudations treuliant deny gwadu deodorant diaroglydd deodorants diaroglydd deodorize diarogli deontological deontolegol deoxygenated deocsigenedig deoxyribose deocsiribos deoxyriboses deocsiribos depart gadael department adran department store siop adrannol department stores siop adrannol departmental adrannol departments adran departure ymadawiad departures ymadawiad dependant dibynnydd dependants dibynnydd dependence caethiwed (=being unable to do without) dependence dibyniaeth (=reliance) dependences caethiwed (=being unable to do without) dependences dibyniaeth (=reliance) dependency dibyniaeth (in general) dependency tiriogaeth ddibynnol (of country) dependent dibynnol (=depending on) dependent behaviour ymddygiad dibynnol dependent behaviours ymddygiad dibynnol dependent child plentyn dibynnol dependent childs plentyn dibynnol dependent population poblogaeth ddibynnol dependent populations poblogaeth ddibynnol dependent variable newidyn dibynnol dependent variables newidyn dibynnol depersonalization dadbersonoli depigmentation dadbigmentiad depigmentations dadbigmentiad depilate diflewio deplete darwagio (in biology) depleted diffygiol (of uranium) depleted uranium wraniwm diffygiol depleted uranium tip treiddiwr wraniwm diffygiol depleted uranium tips treiddiwr wraniwm diffygiol depleted uraniums wraniwm diffygiol depletion disbyddiad (in general) depletions disbyddiad (in general) deploy trefnu milwyr (troops) depolarization dadbolariad depolarizations dadbolariad depolarize dadbolaru depolarizer dadbolarydd depolarizers dadbolarydd depopulate diboblogi depopulated area ardal wedi'i diboblogi depopulated areas ardal wedi'i diboblogi depopulation diboblogaeth depopulations diboblogaeth deport alltudio deportation alltudiaeth deportations alltudiaeth depose diorseddu (=dethrone) depose diswyddo (other than king / queen) deposit adnau (of assets) deposit blaendal (=first payment) deposit dyddodi (chemical, silt etc) deposit dyddodyn (chemical, silt etc) deposit ernes (=money given as pledge) deposit account cyfrif cadw deposit accounts cyfrif cadw deposition deponiad (=sworn evidence) deposition diorseddiad (=dethronement) deposition diswyddiad (of official) deposition dyddodiad (of sediment) depositional dyddodol depositions deponiad (=sworn evidence) depositions diorseddiad (=dethronement) depositions diswyddiad (of official) depositions dyddodiad (of sediment) depositor adneuwr depositors adneuwr deposits adnau (of assets) deposits blaendal (=first payment) deposits dyddodyn (chemical, silt etc) deposits ernes (=money given as pledge) depreciate dibrisio depreciation dibrisiad (act of) depreciation dibrisiant (of currency) depreciations dibrisiad (act of) depreciations dibrisiant (of currency) depress gostwng (=lower) depress gwasgu (push down) depressed area ardal ddirwasgedig depressed areas ardal ddirwasgedig depression dirwasgiad (in economics) depression diwasgedd (of weather) depression gostyngiad (=lowering) depression iselder ysbryd (=low spirits) depression pant (in land) depression of freezing point gostyngiad y rhewbwynt depressions dirwasgiad (in economics) depressions diwasgedd (of weather) depressions gostyngiad (=lowering) depressions iselder ysbryd (=low spirits) depressions pant (in land) depressor gostyngydd depressor nerve nerf gostyngol depressor nerves nerf gostyngol depressors gostyngydd deprivation amddifadedd deprivations amddifadedd deprive amddifadu (in general) deprive difydio (=depose clergyman from office) deprived difreintiedig (of area) deprived area ardal ddifreintiedig deprived areas ardal ddifreintiedig deprived child plentyn amddifadus deprived childs plentyn amddifadus depth dyfnder depth charge ffrwydryn tanddwr depth charges ffrwydryn tanddwr depth dimension dimensiwn dyfnder depth dimensions dimensiwn dyfnder depth gauge medrydd dyfnder depth gauges medrydd dyfnder depth line llinell ddyfnder depth lines llinell ddyfnder depth of field dyfnder ffocws depth perception canfyddiad o ddyfnder depth perceptions canfyddiad o ddyfnder depth stop stop dyfnder depth stops stop dyfnder depths dyfnder deputation dirprwyaeth deputations dirprwyaeth deputy dirprwy deputy head dirprwy bennaeth (of school) deputy headmistress dirprwy brifathrawes deputy heads dirprwy bennaeth (of school) deputy lieutenant dirprwy raglaw deputy lieutenants dirprwy raglaw deregulate dadreoleiddio derelict diffaith dereliction diffeithdra dereliction order gorchymyn dirywiad llwyr dereliction orders gorchymyn dirywiad llwyr derelictions diffeithdra derivation deilliant derivations deilliant derivative deilliad derivative deilliadol derivative art celfyddyd ddeilliadol derivative arts celfyddyd ddeilliadol derivatives deilliad derive deillio derive an expression deillio mynegiad derived deilliadol derived function ffwythiant deilliadol derived functions ffwythiant deilliadol derived scale graddfa ddeilliadol derived scales graddfa ddeilliadol dermal croenol dermal plexus plethwaith plecsws dermaidd dermatitis dermatitis dermatologist dermatolegydd dermatologists dermatolegydd dermatology dermatoleg derrick deric derricks deric desalination dihalwyno descale digennu descant desgant descant recorder recorder desgant descant recorders recorder desgant descant viol feiol ddesgant descant viols feiol ddesgant descants desgant descend disgyn descendant disgynnydd descendants disgynnydd descending disgynnol descending colon colon disgynnol descending colons colon disgynnol descending order trefn ddisgynnol descending orders trefn ddisgynnol descending scale graddfa ddisgyn descending scales graddfa ddisgyn descent disgyniad descents disgyniad describe disgrifio description disgrifiad descriptions disgrifiad descriptive disgrifiadol descriptive language iaith ddisgrifiadol descriptive languages iaith ddisgrifiadol descriptive music cerddoriaeth ddisgrifiadol descriptive musics cerddoriaeth ddisgrifiadol descriptive statistics ystadegau disgrifiadol descriptor disgrifydd descriptors disgrifydd desegregation dadwahanu deselect dad-ddewis desert diffeithdir desert place diffeithle desert places diffeithle desert varnish farnais y diffeithdir desert varnishs farnais y diffeithdir deserted village pentref anghyfannedd deserted villages pentref anghyfannedd deserter enciliwr deserters enciliwr deserts diffeithdir desiccated dysychedig desiccated coconut coconyt mân desiccated coconuts coconyt mân desiccation dysychiad desiccations dysychiad desiccator sychiadur desiccators sychiadur design cynllun (=plan) design cynllunio (=plan) design dyluniad (=sketch or plan drawn) design dylunio (=draw a plan) design a system cynllunio system design and technology dylunio a thechnoleg design brief briff dylunio design briefs briff dylunio design criteria meini prawf dylunio design development datblygiad cynllun design developments datblygiad cynllun design evaluation gwerthuso cynllun design folio ffolio dylunio design framework fframwaith dylunio design frameworks fframwaith dylunio design label label cynllun design labels label cynllun design loop dolen ddylunio design loops dolen ddylunio design of a batik dyluniad batik design process proses ddylunio design refinements gorffeniadau yn y cynllun design thinking ystyried dylunio designate darpar designate dynodi designated dynodedig designated area maes dynodedig designated areas maes dynodedig designated school ysgol ddynodedig designated schools ysgol ddynodedig designer dylunydd designers dylunydd designing of programme cynllunio rhaglen designs cynllun (=plan) designs dyluniad (=sketch or plan drawn) desk desg desk check gwiriad desg desk checks gwiriad desg desks desg desktop bwrdd gwaith desktop publishing cyhoeddi bwrdd gwaith desktops bwrdd gwaith desloughing dadgennu desmomome desmomom desmomomes desmomom desolate diffaith despot unben despotism unbennaeth despotisms unbennaeth despots unben dessert pwdin dessert apple afal bwyta dessert apples afal bwyta desserts pwdin dessertspoon llwy bwdin dessertspoonful llond llwy bwdin dessertspoonfuls llond llwy bwdin dessertspoons llwy bwdin destarch dadstartsio destination cyrchfan destination disk cyrchddisg destination disks cyrchddisg destination feature nodwedd cyrchfan destination features nodwedd cyrchfan destination file ffeil gyrchfan destination files ffeil gyrchfan destinations cyrchfan destroy dinistrio destroyer llong ryfel fechan (ship) destroyers llong ryfel fechan (ship) destructive distrywiol destructive interference ymyriant distrywiol destructive interferences ymyriant distrywiol destructive readout allddarlleniad distrywiol destructive readouts allddarlleniad distrywiol detach datgysylltu detachable datgysylltiol detachable collar coler rhydd detachable collars coler rhydd detached datgysylltiedig detached chain stitch pwyth cadwyn unigol detached chain stitches pwyth cadwyn unigol detached house tŷ sengl detached houses tŷ sengl detail manylu detail manylyn detail drawing lluniad manylion detail drawings lluniad manylion detail paper papur manylion detail papers papur manylion detail scenery set fanwl detailed manwl detailed drawing lluniad manwl detailed drawings lluniad manwl details manylion details manylyn detect canfod detector canfodydd detector valve falf ganfod detector valves falf ganfod detectors canfodydd detention centre canolfan gadw detention centres canolfan gadw detergency glanedwaith detergent glanedydd detergents glanedydd deteriorate dirywio deterioration dirywiad deteriorations dirywiad determinant determinant (in mathematics) determinant penderfynyn (in immunology) determinants determinant (in mathematics) determinants penderfynyn (in immunology) determinate penderfynedig determinate key cywair penodol determination mesuriad (of size) determinations mesuriad (of size) determine darganfod determine penderfynu (movement) determine pennu (in economics) determined coefficient cyfernod pendant determined coefficients cyfernod pendant determinism penderfyniaeth determinisms penderfyniaeth determinist penderfyniadol determinist penderfyniedydd deterministic penderfynedig determinists penderfyniedydd deterrent arf ataliol deterrent ataliol deterrents arf ataliol detour dargyfeiriad detour index mynegrif dargyfeirio detour indexes mynegrif dargyfeirio detours dargyfeiriad detoxicate dadwenwyno detoxication dadwenwyniad detoxications dadwenwyniad detritivore detritysydd detritivores detritysydd detritus detritws (in biology) detritus malurion (=debris) deuce diws deuces diws deuteron diwteron deuterons diwteron devaluation dibrisiad devaluation of the pound dibrisio'r bunt devaluations dibrisiad devastating dinistriol develop datblygu develop control meithrin rheolaeth develop hypotheses datblygu rhagdybiaethau develop knowledge datblygu gwybodaeth develop performance datblygu perfformiad develop rule datblygu rheol develop skills meithrin sgiliau developed country gwlad ddatblygedig developing country gwlad sy'n datblygu developing embryo embryo datblygol development datblygiad development agency asiantaeth ddatblygu development area ardal ddatblygu development areas ardal ddatblygu development chart siart datblygiad development charts siart datblygiad development company cwmni datblygu development grant grant datblygu development grants grant datblygu development land tax treth tir datblygu development land taxes treth tir datblygu development process proses ddatblygu development site safle datblygu development sites safle datblygu development sketch braslun datblygiad development sketches braslun datblygiad developmental datblygiadol developmental age oed datblygiad developmental ages oed datblygiad developmental curriculum cwricwlwm datblygiadol developmental curriculums cwricwlwm datblygiadol developmental delay oediad datblygiad developmental guidance arweiniad ar ddatblygiad developmental guidances arweiniad ar ddatblygiad developmental maturity aeddfedrwydd datblygiad developmental process proses ddatblygiadol developmental reading darllen datblygiadol developmental readings darllen datblygiadol developmental stage cam datblygiadol developmental stages cam datblygiadol developmentally appropriate addas o ran datblygiad developments datblygiad deviance amplification ymhelaethiad o wyriant deviance amplifications ymhelaethiad o wyriant deviant gwyrdröedig deviant behaviour ymddygiad gwyrdröedig deviant behaviours ymddygiad gwyrdröedig deviate gwyro deviation gwyriad deviations gwyriad device dyfais devices dyfais devilled poeth devise dyfeisio devitrification diwydriad devitrifications diwydriad devolution datganoli devoted ymroddedig devotion ymroddiad devotions ymroddiad dew gwlith dew point gwlithbwynt dew points gwlithbwynt dewpond gwlithbwll dewponds gwlithbwll dexterity deheurwydd dextrose decstros dextroses decstros dhamma dhamma (= dharm) dhammas dhamma (= dharm) diabase diabas diabases diabas diabetes diabetes diabetic diabetig diabetic child plentyn diabetig diabetic childs plentyn diabetig diaeresis didolnod diagnose gwneud diagnosis diagnosis diagnosis diagnosis related groups grwpiau diagnosis perthynol diagnostic diagnostig diagnostic assessment asesiad diagnostig diagnostic assessments asesiad diagnostig diagnostic program rhaglen ddiagnostig diagnostic programs rhaglen ddiagnostig diagnostic routine rheolwaith diagnostig diagnostic routines rheolwaith diagnostig diagnostic test prawf diagnostig diagnostic testing profi diagnostig diagnostic tests prawf diagnostig diagnostics diagnosteg diagonal croesgornel (=from one corner to another) diagonal croeslin diagonal croeslinol (on a straight sided figure) diagonal lletraws (=slanted) diagonal bracing cleddu croeslinol diagonal cutting pliers gefelen dorri croeslin diagonal dominance trechedd croeslinol diagonal dominances trechedd croeslinol diagonal hip pocket poced glun letraws diagonal hip pockets poced glun letraws diagonal kick cic letraws diagonal kicks cic letraws diagonal pass pàs letraws diagonal rail rheilen groeslinol diagonal rails rheilen groeslinol diagonal scale graddfa groeslinol diagonal scales graddfa groeslinol diagonal stretcher estynnwr croeslinol diagonal stretchers estynnwr croeslinol diagonal stripe rhes groeslinol diagonal stripes rhes groeslinol diagonal stroke strôc groeslinol (lettering) diagonal strokes strôc groeslinol (lettering) diagonal test prawf croeslinol diagonal testing profi croeslinol diagonal tests prawf croeslinol diagonal wedging lletemu croeslinol diagonal-cutting nipper niper torri croeslinol diagonal-cutting nippers niper torri croeslinol diagonally yn groesgornel (=to opposite corner) diagonally yn groeslinol (in general) diagonals croeslin diagram diagram diagrammatic approach dull diagramatig diagrammatic approaches dull diagramatig diagrammatic notation nodiant arluniol diagrammatic notations nodiant arluniol diagrammatic representation cynrychioliad diagramatig diagrammatic representations cynrychioliad diagramatig diagrammatic technique techneg ddiagramatig diagrammatic techniques techneg ddiagramatig diagrams diagram diakinesis diacinesis dial deial dial gauge medrydd deial dial gauges medrydd deial dial test indicator prawf-ddangosydd deial (D.T.I.) dial test indicators prawf-ddangosydd deial (D.T.I.) dial-up modem modem deialu dial-up modems modem deialu dialect tafodiaith dialectal tafodieithol dialectic dilechdid dialectical materialism materoliaeth ddilechdidol dialectical materialisms materoliaeth ddilechdidol dialectics dilechdid dialects tafodiaith dialogue deialog dialogues deialog dials deial dialysate dialysad dialysates dialysad dialysis dialysis diamagnetism diamagnetedd diamagnetisms diamagnetedd diameter diamedr diameters diamedr diametral diamedrol diametral pitch pitsh diamedrol diametral pitches pitsh diamedrol diamond diemwnt diamond banding bandin diemwnt diamond bandings bandin diemwnt diamond knurl nwrl diemwnt diamond knurls nwrl diemwnt diamond point pwynt diemwnt diamond point chisel cŷn trwyn diemwnt diamond point chisels cŷn trwyn diemwnt diamond points pwynt diemwnt diamond tipped blaen diemwnt diamond tool erfyn diemwnt diamond tools erfyn diemwnt diamond wheel olwyn ddiemwnt diamond wheels olwyn ddiemwnt diamonds diemwnt diapason diapason diapasons diapason diaper diaper diapers diaper diaphragm diaffram (in plants and animals other than mammals) diaphragm llengig (=muscular partition in mammals) diaphragms diaffram (in plants and animals other than mammals) diaphragms llengig (=muscular partition in mammals) diarrhoea dolur rhydd diarrhoeas dolur rhydd diary dyddiadur diastase diastas diastases diastas diastole diastole diastoles diastole diastolic diastolig diastrophism diastroffedd diastrophisms diastroffedd diatom diatom (alga) diatomic deuatomig (yn cynnwys dau atom) diatoms diatom (alga) diatonic diatonig diatonic semitone hanner tôn diatonig diatonic semitones hanner tôn diatonig diatonicism diatonyddiaeth diatonicisms diatonyddiaeth dice deisio dice dis dicentric deusentrig dices dis dicotyledon deugotyledon dicotyledonous deugotyledonaidd dicotyledons deugotyledon dictator unben dictatorial unbenaethol dictators unben dictatorship unbennaeth dictatorship of the proletariat unbennaeth y proletariat dictatorships unbennaeth diction ynganiad dictionary geiriadur dictions ynganiad didactic apparatus cyfarpar didactig didactic model model didactig didactic models model didactig die dei die nut nyten ddei die nuts nyten ddei die-casting deigastio diegetic sound sain gynefin diegetic sounds sain gynefin dielectric deuelectrig dielectric deuelectryn dielectric constant cysonyn deuelectrig dielectric constants cysonyn deuelectrig dielectrics deuelectryn diet deiet dietary deietegol dietary deficiencies diffygion deiet dietary fibre ffibr deietegol dietary fibres ffibr deietegol dietary value sheet taflen gwerth deietegol dietary value sheets taflen gwerth deietegol dietetics deieteg dietitian deietegydd dietitians deietegydd diets deiet difference gwahaniaeth difference amplifier mwyhadur gwahaniaeth difference amplifiers mwyhadur gwahaniaeth difference of means gwahaniaeth cymedrau difference of two squares gwahaniaeth rhwng dau sgwâr differences gwahaniaeth different gwahanol differentiability differadwyedd differentiable differadwy differential differol (in mathematics and physics) differential differyn differential gwahaniaethol (in general) differential assembly cydosodiad differyn differential axis echelin ddifferyn differential calculus calcwlws differol differential coefficient cyfernod differol differential coefficients cyfernod differol differential equation hafaliad differol differential equations hafaliad differol differential erosion erydiad gwahaniaethol differential erosions erydiad gwahaniaethol differential permeability athreiddedd gwahaniaethol differential pulley pwli differol differential tone rhyng-dôn differential tones rhyng-dôn differentially permeable differol athraidd differentials differyn differentiate differu (in mathematics) differentiate gwahaniaethu (in general) differentiated gwahaniaethol differentiated curriculum cwricwlwm gwahaniaethol differentiated curriculums cwricwlwm gwahaniaethol differentiated examination arholiad gwahaniaethol differentiated examinations arholiad gwahaniaethol differentiated paper papur gwahaniaethol differentiated papers papur gwahaniaethol differentiation differiad (in mathematics and physics) differentiation gwahaniaethiad (in general) differentiation by outcome gwahaniaethu yn ôl y canlyniad differentiations differiad (in mathematics and physics) differentiations gwahaniaethiad (in general) difficult anodd difficulty anhawster diffract diffreithio diffraction diffreithiant diffraction grating gratin diffreithiant diffraction gratings gratin diffreithiant diffraction patterns patrymau diffreithiant diffractions diffreithiant diffuse cymysgu (in meteorology) diffuse tryledol diffuse tryledu (in physics and chemistry) diffuse ymledu (=spread out) diffuse porous mandyllog tryledol diffused lighting golau tryledol diffused lightings golau tryledol diffuser tryledwr diffuser spray tryledwr chwistrell diffusers tryledwr diffusion lledaenu diffusion trylediad (in physics and chemistry) diffusion ymlediad (=spreading out) diffusion cloud chamber llestr niwl trylediad diffusion cloud chambers llestr niwl trylediad diffusions ymlediad (=spreading out) diffusivity trylededd dig cloddfa (archaeological) dig cloddio digest treulio digestibility treuliadwyedd digestibility coefficient cyfernod treuliadwyedd digestibility coefficients cyfernod treuliadwyedd digestible treuliadwy digestion treuliad digestions treuliad digestive biscuit bisged ddigestif digestive biscuits bisged ddigestif digestive enzyme ensym treulio digestive enzymes ensym treulio digestive juice sudd treulio digestive juices sudd treulio digestive system system dreulio digestive systems system dreulio digit digid digit repetition test prawf ailadrodd rhifau digit repetition tests prawf ailadrodd rhifau digital digidol digital computer cyfrifiadur digidol digital computers cyfrifiadur digidol digital dice dis digidol digital dices dis digidol digital meter mesurydd digidol digital meters mesurydd digidol digital plotter plotydd digidol digital plotters plotydd digidol digital root isradd digidol digital roots isradd digidol digital signal signal digidol digital signals signal digidol digital-analogue converter trawsnewidydd digidol-analog (DAC) digital-analogue converters trawsnewidydd digidol-analog (DAC) digitation byseddiad (in botany and zoology) digitation digideiddiad (in computing) digitations byseddiad (in botany and zoology) digitations digideiddiad (in computing) digits digid dignity urddas digraph deugraff digraphs deugraff dihedral deuhedrol dihedral angle ongl ddeuhedrol dihedral angles ongl ddeuhedrol dihybrid deuhybrid dihybrids deuhybrid dilate ymagor (of blood-vessel etc) dilate ymledu (of pupils, cervix) dilation ymlediad dilations ymlediad dilemma cyfyng-gyngor dilemmas cyfyng-gyngor diluent gwanedydd diluents gwanedydd dilute gwanedig dilute gwanedu dilute acid asid gwanedig dilute acids asid gwanedig dilute sulphuric acid asid sylffwrig gwanedig dilute sulphuric acids asid sylffwrig gwanedig dilution gwanediad dilution teneuo (of skilled workers) dilutions gwanediad dim pylu dim pŵl dimension dimensiwn dimension dimensiynu dimensional dimensiynol dimensional control rheolaeth ddimensiynol dimensional controls rheolaeth ddimensiynol dimensional sketch braslun dimensiynol dimensional sketches braslun dimensiynol dimensioned drawing lluniad dimensiynol dimensioned drawings lluniad dimensiynol dimensions dimensiwn dimer deumer dimers deumer dimetric projection tafluniad deufetrig dimetric projections tafluniad deufetrig diminish cywasgu (in music) diminish lleihau (in general) diminished cywasg (in music) diminished llai (in general) diminished chord cord cywasg diminished chords cord cywasg diminished image delwedd lai diminished images delwedd lai diminished interval cyfwng cywasg diminished intervals cyfwng cywasg diminished seventh chord cord seithfed cywasg diminished seventh chords cord seithfed cywasg diminishing returns enillion lleihaol diminution cywasgiad (in music) diminution lleihad (in general) diminutions cywasgiad (in music) diminutions lleihad (in general) dimmer pylydd dimmer board bwrdd pylu dimmer boards bwrdd pylu dimmer-switch switsh pylu dimmer-switches switsh pylu dimmers pylydd dining chair cadair ystafell fwyta dining chairs cadair ystafell fwyta dining room ystafell fwyta dining rooms ystafell fwyta dining table bwrdd bwyd dining tables bwrdd bwyd dinner lady cynorthwyydd cinio dinosaur dinosor dinosaurs dinosor dinucleotide deuniwcliotid dinucleotides deuniwcliotid diocesan esgobaethol diocese esgobaeth dioceses esgobaeth diode deuod diodes deuod dioecious deuoecaidd diorama diorama dioramas diorama diorite diorit diorites diorit dioxide deuocsid dioxides deuocsid dioxygenated deuocsigenedig dip dip dip dipio dip gogwyddiad dip goledd (of strata) dip goleddu (of strata) dip trochdrwyth (for sheep) dip coating trocharaenu dip slope golethr dip slopes golethr diphtheria difftheria diphtherias difftheria diploid diploid diploid nucleus niwclews diploid diploidy diploidi diploma diploma diplomacy diplomyddiaeth diplomas diploma diplomat diplomydd diplomatic diplomyddol diplomatic history hanes diplomyddiaeth diplomatics diplomateg diplomats diplomydd dipole deupol dipole moment moment deupol dipole moments moment deupol dipoles deupol dipper dipell (oil painting) dipper trochydd dippers dipell (oil painting) dippers trochydd dipping trochi dipstick trochbren dipsticks trochbren direct cyfeirydd (sign) direct uniongyrchol direct access cyrchu uniongyrchol direct access mynediad uniongyrchol direct addressing cyfeirio uniongyrchol direct advertising hysbysebu uniongyrchol direct application rhoi (of paint etc) direct care gofal uniongyrchol direct cares gofal uniongyrchol direct contact cyswllt uniongyrchol direct contacts cyswllt uniongyrchol direct current cerrynt union (D.C.) direct current motor modur cerrynt union direct current motors modur cerrynt union direct currents cerrynt union (D.C.) direct data entry cofnodi data uniongyrchol direct dye llifyn uniongyrchol direct dyes llifyn uniongyrchol direct experience profiad uniongyrchol direct experiences profiad uniongyrchol direct free kick cic rydd uniongyrchol direct free kicks cic rydd uniongyrchol direct instruction dysgu uniongyrchol direct lighting golau uniongyrchol direct lightings golau uniongyrchol direct marketing marchnata uniongyrchol direct marketings marchnata uniongyrchol direct method dull uniongyrchol direct methods dull uniongyrchol direct moulding clay clai modelu uniongyrchol direct painting peintio uniongyrchol direct parry pario union direct proportion cyfrannedd union direct proportions cyfrannedd union direct ratio cymhareb union direct riposte riposte union direct ripostes riposte union direct taxes trethi uniongyrchol direct thrust gwaniad union direct thrusts gwaniad union direct variation amrywiad union direct variations amrywiad union direct vision spectroscope sbectrosgop golwg union direct vision spectroscopes sbectrosgop golwg union directed number rhif cyfeiriol directed numbers rhif cyfeiriol directed work gwaith gosod directed works gwaith gosod direction cyfeiriad direction of arrow A cyfeiriad saeth A direction of cut cyfeiriad y toriad direction of feed cyfeiriad porthiant direction of grain cyfeiriad y graen direction of movement cyfeiriad symudiad direction of rotation cyfeiriad y cylchdro (D.O.R.) direction of the ball cyfeiriad y bêl direction of throw cyfeiriad y tafliad directional cyfeiriadol directional selection detholiad cyfeiriadol directional selections detholiad cyfeiriadol directions cyfeiriad directions test prawf dilyn cyfarwyddiadau directions tests prawf dilyn cyfarwyddiadau directive cyfarwyddeb (in computing etc) directive cyfarwyddyd (in general) directives cyfarwyddeb (in computing etc) directives cyfarwyddyd (in general) director cyfarwyddwr director circle cyfeirgylch director circles cyfeirgylch director of education cyfarwyddwr addysg director of nursing services cyfarwyddwr gwasanaethau nyrsio directors cyfarwyddwr directory cyfeiriadur directrix cyfeirlin directrixes cyfeirlin directs cyfeirydd (sign) disability anabledd disable analluogi disable interruptions analluogi ymyriadau disabled anabl disabled people pobl anabl disabled peoples pobl anabl disabled relief rhyddhad anabledd disabled reliefs rhyddhad anabledd disablement anabledd disablement allowance lwfans yr anabl disablement allowances lwfans yr anabl disablement pension pensiwn yr anabl disablement pensions pensiwn yr anabl disablement resettlement officer swyddog ailsefydlu'r anabl disablement resettlement officers swyddog ailsefydlu'r anabl disablements anabledd disaccharide deusacarid disaccharides deusacarid disadvantaged dan anfantais disadvantaged group grŵp sydd dan anfantais disadvantaged groups grŵp sydd dan anfantais disadvantaged socially dan anfantais gymdeithasol disaffection annheyrngarwch disaffections annheyrngarwch disaggregate dadagregu disapplication datgymhwysiad disapplications datgymhwysiad disapply datgymhwyso disarm diarfogi disassembler dadgydosodydd disassemblers dadgydosodydd disc disg disc sander sandiwr disg disc sanders sandiwr disg discard gwaredu discharge arllwys (water) discharge arllwysiad (water) discharge dadwefriad (electrical) discharge dadwefru (electricity) discharge rhedlif (of pus, liquid etc) discharge rhyddhau (=release) discharge emission allyriad discharge emissions allyriad discharge planning cynllunio rhyddhau discharge tube tiwb dadwefru discharge tubes tiwb dadwefru discharger dadwefrydd dischargers dadwefrydd discharges arllwysiad (water) discharges dadwefriad (electrical) discharges rhedlif (of pus, liquid etc) disciplinarian disgyblwr disciplinarians disgyblwr disciplinary action camau i ddisgyblu discipline disgyblaeth disciplined disgybledig disciplines disgyblaeth disclosure datgeliad disclosures datgeliad disco disgo discography disgyddiaeth discolour afliwio discolouration afliwiad discolourations afliwiad disconnect datgysylltu discontent anniddigrwydd discontents anniddigrwydd discontinuity diffyg parhad discontinuous amharhaol (of variation) discontinuous toredig (=intermittent) discord anghytgord discordant anghydnaws (of colours) discordant anghytgordiol (of music) discordant anghytûn (of opinions) discords anghytgord discount disgownt discount store siop ddisgownt discount stores siop ddisgownt discounted cash flow llif arian disgowntiedig discounted cash flows llif arian disgowntiedig discounts disgownt discovery darganfyddiad discrete arwahanol (separate and distinct) discrete area of activity maes gweithgaredd annibynnol discrete data data arwahanol discrete programme of study rhaglen astudio annibynnol discrete random variable hapnewidyn arwahanol discrete random variables hapnewidyn arwahanol discrete variable newidyn arwahanol discrete variables newidyn arwahanol discretion disgresiwn discretionary dewisol discretionary exception eithriad dewisol discretionary exceptions eithriad dewisol discretionary grant grant dewisol discretionary grants grant dewisol discretions disgresiwn discriminant gwahanolyn discriminants gwahanolyn discriminate gwahaniaethu discrimination didoli (in exam questions) discrimination dirnadaeth (=good taste) discrimination gwahaniaethu (against) discrimination index cyfeirnod didoli discrimination indexes cyfeirnod didoli discriminations dirnadaeth (=good taste) discriminatory behaviour ymddygiad gwahaniaethol discriminatory behaviours ymddygiad gwahaniaethol discriminatory practice arfer gwahaniaethol discriminatory practices arfer gwahaniaethol discs disg discus disgen discuss trafod discussion trafodaeth discussion group cylch trafod (informal) discussion groups cylch trafod (informal) discussions trafodaeth disease clefyd diseased afiach diseases clefyd diseconomies of scale annarbodion maint disembark glanio disendow dadwaddoli disendowment dadwaddoliad disendowments dadwaddoliad disenfranchise dadryddfreinio disengage datgyweddu disengagement datgyweddiad disengagements datgyweddiad disequilibrium diffyg cydbwysedd disequilibrium unemployment diweithdra heb gydbwysedd disequilibrium unemployments diweithdra heb gydbwysedd disequilibriums diffyg cydbwysedd disestablish datgysylltu disestablishment datgysylltiad disestablishments datgysylltiad disfigurement anffurfiad disfigurements anffurfiad disguise cuddio (=conceal) dish dysgl dished base gwaelod dysglog dished bases gwaelod dysglog dished blank blanc dysglog dished blanks blanc dysglog dished shape siâp dysglog dished shapes siâp dysglog dishing bolio (=make convex) dishing pantio (=make concave) dishs dysgl dishwasher peiriant golchi llestri dishwashers peiriant golchi llestri disillusion dadrithio disincentive anghymhelliad disincentives anghymhelliad disinfect diheintio disinfectant diheintydd disinfectants diheintydd disinfected diheintiedig disinfection diheintiad disinfections diheintiad disintegrate chwalu (of rock) disintegrate ymddatod (in physics) disintegrated chwilfriw disintegration chwilfriwiant (of rock) disintegration ymddatodiad (in physics) disintegrations chwilfriwiant (of rock) disintegrations ymddatodiad (in physics) disjoint sets setiau digyswllt disk disg disk controller rheolydd disgiau disk controllers rheolydd disgiau disk crash chwalfa disg disk crashs chwalfa disg disk drive disgyrrwr disk drives disgyrrwr disk filing system system ddisg-ffeilio (DFS) disk filing systems system ddisg-ffeilio (DFS) disk head pen disg disk heads pen disg disk operating system system weithredu disg (DOS) disk operating systems system weithredu disg (DOS) disk pack pecyn disgiau disk packs pecyn disgiau disks disg dislocate afleoli dislocation afleoliad dislocations afleoliad dismantle datgysylltu dismembered drainage draeniad datgymalog dismembered drainages draeniad datgymalog dismount dadlwytho disobedience anufudd-dod disobediences anufudd-dod disobedient anufudd disorder anhrefn (=lack of order) disorder anhwylder (medical) disorderly pupil disgybl anystywallt disorderly pupils disgybl anystywallt disorders anhrefn (=lack of order) disorders anhwylder (medical) dispensary dosbarthfa dispersal gwasgariad dispersal of spores gwasgariad sborau dispersals gwasgariad disperse gwasgaru disperse medium cyfrwng gwasgaru disperse mediums cyfrwng gwasgaru disperse phase gwasgarwedd disperse phases gwasgarwedd dispersed gwasgarog dispersion gwasgariad dispersions gwasgariad dispersive gwasgarol dispersive power nerth gwasgaru dispersive powers nerth gwasgaru displace dadleoli displacement dadleoliad (of gases) displacement / time diagram diagram dadleoliad / amser displacement / time diagrams diagram dadleoliad / amser displacement angle ongl ddadleoliad displacement angles ongl ddadleoliad displacement diagram diagram dadleoliad displacement diagrams diagram dadleoliad displacement reaction adwaith dadleoli displacement reactions adwaith dadleoli displacement tonnage tunelledd dadleoliad displacement tonnages tunelledd dadleoliad displacements dadleoliad (of gases) display arddangos display arddangosfa (=small exhibition) display arddangosiad (act of) display dangosydd (on screen) display area lle dangos display areas lle dangos display board bwrdd arddangos display boards bwrdd arddangos display of dancing arddangosfa ddawnsio display panel panel arddangos display panels panel arddangos display stand stand arddangos display stands stand arddangos displayed formula fformiwla graffig displayed formulas fformiwla graffig disposable tafladwy disposable income incwm gwario disposable incomes incwm gwario disposable nappy cewyn parod disposable palette palet hepgor disposable palettes palet hepgor disposal gwarediad disposals gwarediad dispose gwaredu dispose of fullness ad-drefnu llawnder disproportionation dadgyfraniad disproportionations dadgyfraniad disputant dadleuwr disputants dadleuwr disputation dadl disputations dadl dispute anghydfod dispute resolution process proses datrys anghydfod disputes anghydfod disqualification diarddeliad disqualifications diarddeliad disqualify diarddel disqualify from the race diarddel o'r ras disrupt aflonyddu disruption aflonyddwch disruptions aflonyddwch disruptive aflonyddgar disruptive behaviour ymddygiad aflonyddgar disruptive behaviours ymddygiad aflonyddgar disruptive pupil disgybl aflonyddgar disruptive pupils disgybl aflonyddgar disruptive selection detholiad rhwygol disruptive selections detholiad rhwygol disruptiveness aflonyddwch dissect dyrannu dissected plateau llwyfandir dyranedig dissected plateaus llwyfandir dyranedig dissected rat llygoden fawr ddyranedig dissection dyraniad dissections dyraniad disseminate lledaenu dissemination of good practice lledaenu ymarfer da dissent anghydffurfiaeth dissenter anghydffurfiwr dissenters anghydffurfiwr dissenting anghydffurfiol dissents anghydffurfiaeth dissipate afradloni dissipation afradlonedd dissipations afradlonedd dissociate daduno dissociation daduniad dissociation constant cysonyn daduniad dissociation constants cysonyn daduniad dissociation curve cromlin ddaduniad dissociation curves cromlin ddaduniad dissociations daduniad dissolution diddymiad dissolution of the monasteries diddymu'r mynachlogydd dissolutions diddymiad dissolve diddymu (=dismiss or annul) dissolve hydoddi (e.g. solid in a liquid) dissolve toddi (in film editing and non-technical usage) dissonance anghyseinedd dissonances anghyseinedd dissonant anghyseiniol dissonant interval cyfwng anghyseiniol dissonant intervals cyfwng anghyseiniol distaff cogail distaffs cogail distal distal distal convoluted tubule tiwbyn troellog pen pellaf distal convoluted tubules tiwbyn troellog pen pellaf distal end pen pellaf distal ends pen pellaf distal tubule pen pella'r tiwbyn distal tubules pen pella'r tiwbyn distance pellter distance education addysg o bell distance educations addysg o bell distance learning dysgu o bell distance piece darn pellter distance pieces darn pellter distance swimming nofio pellter distance teaching addysgu o bell distance-decay gwanhad-pellter distances pellter distemper distemper distemper paint paent distemper distemper paints paent distemper distempers distemper distended chwyddedig distention chwyddiant distentions chwyddiant distil distyllu distillate distyllad distillates distyllad distillation distyllu distilled water dŵr distyll distilled waters dŵr distyll distinct amlwg distinctive nodedig distinguish gwahaniaethu distinguishable gwahaniaethadwy distinguishing note nodyn dangos (sol-fa) distinguishing notes nodyn dangos (sol-fa) distort aflunio (image) distort ystumio (facts) distort sprite aflunio corlun distortion afluniad (of image) distortion ystumiad (of facts) distortions afluniad (of image) distortions ystumiad (of facts) distract gwrthdynnu distraction gwrthdyniad distractions gwrthdyniad distractor gwrthdynnwr (in objective questions) distractors gwrthdynnwr (in objective questions) distrain atafaelu distraint atafaeliad distraints atafaeliad distress cyfyngder distress signal arwydd cyfyngder distress signals arwydd cyfyngder distress warrant gwarant atafaelu distress warrants gwarant atafaelu distributary allafon distributary channel allsianel distributary channels allsianel distribute dosbarthu (=share out) distribute dosrannu (in statistics) distributed computer system system gyfrifiadurol wasgaredig distributed computer systems system gyfrifiadurol wasgaredig distributed loading llwyth dosbarthedig distributed loadings llwyth dosbarthedig distribution dosbarthiad (=sharing out or dispersal) distribution dosraniad (=division into parts, classification) distribution channel sianel dosbarthu distribution channels sianel dosbarthu distribution coefficient cyfernod dosraniad distribution coefficients cyfernod dosraniad distribution curve cromlin ddosraniad distribution curves cromlin ddosraniad distribution of wealth dosbarthiad cyfoeth distribution pattern patrwm dosbarthiad distribution patterns patrwm dosbarthiad distributions dosbarthiad (=sharing out or dispersal) distributions dosraniad (=division into parts, classification) distributive dosbarthol distributive law deddf ddosbarthol distributive laws deddf ddosbarthol distributive trade masnach ddosbarthu distributive trades masnach ddosbarthu distributor dosbarthydd distributors dosbarthydd district ardal (=area with common characteristics) district dosbarth (=division of county electing its own councillors) district council cyngor dosbarth district councils cyngor dosbarth district education officer swyddog addysg rhanbarthol district education officers swyddog addysg rhanbarthol district general hospital ysbyty cyffredinol dosbarth district general hospitals ysbyty cyffredinol dosbarth district nurse nyrs ardal district nurses nyrs ardal district valuer prisiwr rhanbarth district valuers prisiwr rhanbarth districts ardal (=area with common characteristics) districts dosbarth (=division of county electing its own councillors) disturb tarfu ar disturbance aflonyddwch (=unrest) disturbance cynnwrf (=agitation) disturbances aflonyddwch (=unrest) disturbances cynnwrf (=agitation) disturbed aflonydd (=agitated) disturbed cythryblus (of psychological condition) disturbed pupil disgybl cythryblus disturbed pupils disgybl cythryblus disunite tynnu'n rhydd dital harp telyn fysell dital harps telyn fysell dither mwydro ditty canig diuresis troethlif diuretic diwretig diuretics diwretig diurnal dyddiol dive deif dive deifio dive at a striker's feet deifio wrth draed ymosodwr dive for the ball deifio am y bêl dive forward roll deifrol ymlaen dive forward rolls deifrol ymlaen diverge dargyfeirio divergence dargyfeiriad divergences dargyfeiriad divergent dargyfeiriol divergent question cwestiwn dargyfeiriol divergent questions cwestiwn dargyfeiriol divergent series cyfres ddargyfeiriol divergent thinking meddwl dargyfeiriol divergent thinkings meddwl dargyfeiriol diverging lens lens dargyfeirio diversify amrywiaethu diversion dargyfeiriad diversions dargyfeiriad diversity amrywiaeth divertimento divertimento dives deif divide gwahanfa ddŵr divide rhannu divide by a number rhannu â rhif divided rhanedig dividend buddran (=sum of money) dividend rhannyn (=number to be divided) dividends buddran (=sum of money) dividends rhannyn (=number to be divided) divider rhannwr dividers cwmpas mesur dividers rhannwr divides gwahanfa ddŵr dividing a line rhannu llinell dividing areas rhannu arwynebedd dividing head pen rhannu dividing heads pen rhannu dividing lines in perspective rhannu llinellau mewn persbectif divisibility rhanadwyedd divisible rhanadwy division adran (of football league etc) division gradden (of scale) division rhaniad (=part) division by factors rhannu â ffactorau division of labour rhaniad llafur divisional court llys adrannol divisional courts llys adrannol divisions adran (of football league etc) divisions amrywiadau (=variations) divisions gradden (of scale) divisions rhaniad (=part) divisor rhannydd divisors rhannydd divorce ysgariad divorce ysgaru divorces ysgariad dizygotic DZ deusygotig DS dizziness pendro do nothing instruction cyfarwyddyd gwneud dim do nothing instructions cyfarwyddyd gwneud dim do-se-do do-si-do doatiness llwydni mewn pren doctor meddyg doctorate doethuriaeth doctorates doethuriaeth doctors meddyg doctrine athrawiaeth doctrines athrawiaeth document dogfen document dogfennu document a system dogfennu system document reader darllenydd dogfennau document readers darllenydd dogfennau document window ffenestr dogfen document windows ffenestr dogfen documentation dogfennaeth documentations dogfennaeth documents dogfen docusoap sebon dogfennol docusoaps sebon dogfennol dodecagon dodecagon dodecagons dodecagon dodecahedron dodecahedron dodecahedrons dodecahedron dodecanal dodecanal dodecanals dodecanal dodecaphonic dodecaffonig dodecaphonic scale graddfa ddodecaffonig dodecaphonic scales graddfa ddodecaffonig dodecaphony dodecaffoni dodge osgoi dog paddle nofio ci dogfish morgi dogfishs morgi doily doili doldrums doldrymau dolerite dolerit dolerites dolerit dolina dolin dolinas dolin doll choice dewis doliau doll choices dewis doliau dollar doler dollar key bysell doler dollars doler dolly doli dolly peg peg doli dolly pegs peg doli dolly riveting rhybedu doli (bolster) dolman sleeve llawes ddolman dolman sleeves llawes ddolman dolmen dolmen dolmens dolmen dolomite dolomit dolomites dolomit dolphin dolffin dolphin kick cic dolffin dolphin kicks cic dolffin dolphins dolffin domain parth domains parth dome cromen dome cromennu dome castor castor cromen dome castors castor cromen domed cromennog domed blank blanc crymdo domed blanks blanc crymdo domed button botwm cromen domed buttons botwm cromen domes cromen domestic domestig (in general) domestic mewnol (not foreign) domestic affair mater mewnol domestic affairs mater mewnol domestic demand galw mewnol domestic demands galw mewnol domestic fuel tanwydd domestig domestic fuels tanwydd domestig domestic history hanes teuluol domestic industry diwydiant aelwyd domestic iron haearn smwddio domestic irons haearn smwddio domestic mains supply prif gyflenwad domestig domestic policy polisi cartref domestic science gwyddor cartref domestic sciences gwyddor cartref domestic staff staff domestig domestic studies astudiaethau cartref domestic system trefn aelwyd domestic systems trefn aelwyd domestic tourist ymwelydd o Brydain (in Britain) domestic tourists ymwelydd o Brydain (in Britain) domestic violence trais yn y cartref domestic violences trais yn y cartref domesticate dofi domiciliary cartref domiciliary service gwasanaeth cartref domiciliary services gwasanaeth cartref domiciliary visit ymweliad cartref domiciliary visits ymweliad cartref dominance goruchafiaeth dominances goruchafiaeth dominant llywydd (in music) dominant trechol (in general) dominant attribute priodwedd drechol dominant attributes priodwedd drechol dominant cadence diweddeb amherffaith dominant cadences diweddeb amherffaith dominant colour lliw trechol dominant colours lliw trechol dominant factor ffactor drechol dominant factors ffactor drechol dominant feature nodwedd trechol dominant features nodwedd trechol dominant seventh chord cord seithfed y llywydd dominant seventh chords cord seithfed y llywydd dominant wind gwynt cryfaf dominant winds gwynt cryfaf dominants llywydd (in music) dominate goruchafu (in the natural environment) dominate tra-arglwyddiaethu (of people) domination tra-arglwyddiaeth dominations tra-arglwyddiaeth doming hammer morthwyl cromennu doming hammers morthwyl cromennu dominion awdurdod (=control) dominion dominiwn (=territory) dominions awdurdod (=control) dominions dominiwn (=territory) domino domino domino banding bandin domino domino bandings bandin domino donkey seddisl (easel) donor rhoddwr donor molecule moleciwl cyfrannol donor molecules moleciwl cyfrannol donors rhoddwr doodling dwdlan door drws door fitting gosod drws door frame ffrâm ddrws door frames ffrâm ddrws door furniture celfi drws door latch clicied drws door latches clicied drws door lock clo drws door locks clo drws door panel panel drws door panels panel drws door-to-door salesman gwerthwr o ddrws i ddrws door-to-door salesmans gwerthwr o ddrws i ddrws doors drws dopamine dopamin dopamines dopamin doping amhureddu dormancy cysgiad dormant cwsg dormant bud blaguryn cwsg dormant buds blaguryn cwsg dormant volcano llosgfynydd cwsg dormer roof to dormer dormer roofs to dormer dormer window ffenestr do dormer windows ffenestr do dormitory dortur dormitory town tref noswylio dormitory towns tref noswylio dormitory village pentref noswylio dormitory villages pentref noswylio dorsal dorsal dorsal exercise ymarfer uwchgefn dorsal exercises ymarfer uwchgefn dorsal fin asgell ddorsal dorsal fins asgell ddorsal dorsal spine pigyn dorsal dorsal spines pigyn dorsal dorsiflexion cefnblygiad dorsiflexions cefnblygiad dorsiventral cefndorrol dorter dortur dorters dortur dose dos doses dos dot dot dot dotio dot matrix printer argraffydd matrics dot matrix printers argraffydd matrics dot pitch pitsh dotiau dot pitches pitsh dotiau dot punch pwnsh dotio dot punches pwnsh dotio dot punching dotbwnsio dotted line llinell doredig dotted lines llinell doredig dotted note nodyn dot dotted notes nodyn dot dotted rest tawnod dot dotted rests tawnod dot double dwbl double dyblu double action harp telyn arwaith dwbl double action harps telyn arwaith dwbl double arch dwy law i ffurfio pont (in dance) double award dyfarniad dwbl double awards dyfarniad dwbl double back stitch pwyth ôl dwbl double back stitches pwyth ôl dwbl double bar bar dwbl double bar line llinell bar dwbl double bar lines llinell bar dwbl double bars bar dwbl double bass bas dwbl double bass player canwr bas dwbl double bass players canwr bas dwbl double bassoon basŵn dwbl double bassoonist canwr basŵn dwbl double bassoonists canwr basŵn dwbl double bassoons basŵn dwbl double blast foot bellows megin droed chwyth dwbl double bond bond dwbl double bonds bond dwbl double buffering byffro dwbl double chain stitch pwyth cadwyn ddwbl double chain stitches pwyth cadwyn ddwbl double chorus côr dwbl double circulation cylchrediad dwbl double circulations cylchrediad dwbl double concerto concerto dwbl double counterpoint gwrthbwynt dwbl double counterpoints gwrthbwynt dwbl double cream hufen dwbl double creams hufen dwbl double cropping cnydio dwbl double cut file ffeil toriad dwbl double cut files ffeil toriad dwbl double decomposition dadelfeniad dwbl double decompositions dadelfeniad dwbl double density dwysedd dwbl double diapason diapason dwbl double diapasons diapason dwbl double dipper dipell ddwbl double dippers dipell ddwbl double dotted note nodyn deuddot double dotted notes nodyn deuddot double dribble dribl dwbl double dribbles dribl dwbl double ended dart dart deubwynt double ended darts dart deubwynt double engagement cyweddiad dwbl double engagements cyweddiad dwbl double entry llyfrifo dwbl double exposition dangosiad dwbl double expositions dangosiad dwbl double faced hammer morthwyl dau wyneb crwn double faced hammers morthwyl dau wyneb crwn double faggot stitch pwyth ffagod dwbl double faggot stitches pwyth ffagod dwbl double fault ffawt ddwbl double faults ffawt ddwbl double flat meddalnod dwbl double flats meddalnod dwbl double folded seam sêm ddeublyg double folded seams sêm ddeublyg double fugue ffiwg ddwbl double fugues ffiwg ddwbl double glazing gwydro dwbl double haunched dwbl hansiedig double helix helics dwbl double helixes helics dwbl double hem hem ddwbl double hems hem ddwbl double hollow-bit tongs gefel gegron ddwbl double incontinence anymataliaeth ddwbl double incontinences anymataliaeth ddwbl double knot stitch pwyth cwlwm dwbl double knot stitches pwyth cwlwm dwbl double lapped dovetail joint goruniad cynffonnog dwbl double lapped dovetail joints goruniad cynffonnog dwbl double length hyd dwbl double length arithmetic rhifyddeg hyd dwbl double length arithmetics rhifyddeg hyd dwbl double lengths hyd dwbl double lesson gwers ddwbl double lessons gwers ddwbl double machine stitched seam sêm ffel ddwbl double machine stitched seams sêm ffel ddwbl double mortise and tenon joint uniad mortais a thyno dwbl double mortise and tenon joints uniad mortais a thyno dwbl double open diapason diapason agored dwbl double open diapasons diapason agored dwbl double patch pocket poced glwt ddwbl double patch pockets poced glwt ddwbl double pointed dart dart deubwynt double pointed darts dart deubwynt double precision trachywiredd dwbl double precision arithmetic rhifyddeg trachywiredd dwbl double precision arithmetics rhifyddeg trachywiredd dwbl double precisions trachywiredd dwbl double quote dyfynnod dwbl double quotes dyfynnod dwbl double reed brwynen ddwbl double reeds brwynen ddwbl double roof to trawslath double roofs to trawslath double scull sgwl dwbl double sculls sgwl dwbl double sharp llonnod dwbl double sharps llonnod dwbl double sheet cynfas ddwbl double sheets cynfas ddwbl double somersault trosben dwbl double somersaults trosben dwbl double spacing bylchu dwbl double stopping gwasgiad dwbl double stoppings gwasgiad dwbl double strike trawiad dwbl double strikes trawiad dwbl double suspension gohiriant dwbl (in music) double suspensions gohiriant dwbl (in music) double take-off esgyniad deudroed double take-offs esgyniad deudroed double tenon tyno dwbl double tenons tyno dwbl double thickness trwch dwbl double thread edau ddwbl double threads edau ddwbl double tide dau lanw double tides dau lanw double tonguing tafodi dwbl double turning troad dwbl double turnings troad dwbl double virginal firdsinal ddwbl double virginals firdsinal ddwbl double-acting coupler cyplydd dwyffordd double-acting couplers cyplydd dwyffordd double-acting cylinder silindr gweithrediad-dwbl double-acting cylinders silindr gweithrediad-dwbl double-boarded floor llawr estyll dwbl double-boarded floors llawr estyll dwbl double-breasted â chaead dwbl (coat) double-ended bolt bollt ddeuben double-ended bolts bollt ddeuben double-ended spanner sbaner deuben double-ended spanners sbaner deuben double-glazed door drws dwbl-wydrog double-glazed doors drws dwbl-wydrog double-glazed window ffenestr gwydr dwbl double-glazed windows ffenestr gwydr dwbl double-headed screw sgriw edau ddeuben double-headed screws sgriw edau ddeuben double-lap tile teilsen lap dwbl double-lap tiles teilsen lap dwbl doubles dwbl doubles parau doubles game gêm i barau doubles games gêm i barau doublet dwbled doublets dwbled dove grey llwydlas (enamelling colour) dovetail angle ongl gynffonnog dovetail angles ongl gynffonnog dovetail bridle bagl gynffonnog dovetail bridle joint uniad bagl cynffonnog dovetail bridle joints uniad bagl cynffonnog dovetail bridles bagl gynffonnog dovetail cleat cledd cynffonnog dovetail cleats cledd cynffonnog dovetail halving haneru cynffonnog dovetail halving joint uniad haneru cynffonnog dovetail halving joints uniad haneru cynffonnog dovetail housing joint uniad rhigol gynffonnog dovetail housing joints uniad rhigol gynffonnog dovetail joint uniad cynffonnog dovetail joints uniad cynffonnog dovetail key clo cynffonnog dovetail nailing hoelio cynffonnog dovetail pin pìn cynffonnog dovetail pins pìn cynffonnog dovetail saw llif dyno fach dovetail saws llif dyno fach dovetail slope goledd cynffonnog dovetail slopes goledd cynffonnog dovetail tapered housing joint uniad rhigol gynffonnog daprog dovetail tapered housing joints uniad rhigol gynffonnog daprog dovetail template patrymlun cynffonnog dovetail templates patrymlun cynffonnog dovetailed key allwedd gynffonnog dovetailing tryfalu dovetailing machine peiriant uniadau cynffonnog dovetailing machines peiriant uniadau cynffonnog dowager gweddw dowagers gweddw dowel hoelbren dowel bit ebill hoelbren dowel bits ebill hoelbren dowel construction adeiladwaith hoelbren dowel constructions adeiladwaith hoelbren dowel groove rhigol hoelbren dowel grooves rhigol hoelbren dowel guide cyfeirydd hoelbren dowel guides cyfeirydd hoelbren dowel jig jig hoelbrennau dowel jigs jig hoelbrennau dowel joint uniad hoelbren dowel joints uniad hoelbren dowel peg peg hoelbren dowel pegs peg hoelbren dowel plate plât hoelbrennau dowel plates plât hoelbrennau dowel rod rhoden hoelbren dowel rods rhoden hoelbren dowels hoelbren down arrow saeth i lawr down arrows saeth i lawr down beat music cerddoriaeth curiad cryf down beat musics cerddoriaeth curiad cryf down cutting tyrchu (=vertical corrasion) down payment blaendal down payments blaendal down time amser di-fynd down times amser di-fynd down-count cyfrif i lawr down-counts cyfrif i lawr down-field i lawr y maes (of magnetic field) down-stroke ôl-strôc down-strokes ôl-strôc downbeat curiad i lawr downbeats curiad i lawr downdate dad-ddiweddaru downfold plyg i lawr downfolds plyg i lawr downhill side ochr waered downhill sides ochr waered downhill transition trawsnewid gwaeredol downhill transitions trawsnewid gwaeredol downland twyndir downlands twyndir download llwytho i lawr downpour cawod drom downpours cawod drom downstream i lawr yr afon downthrow side ochr syrthiedig downthrow sides ochr syrthiedig downtown canol tref downtowns canol tref downward i lawr downward pressure gwasgedd tuag i lawr downward pressures gwasgedd tuag i lawr downward sloping curve cromlin ddisgynnol downward sloping curves cromlin ddisgynnol downward vertical fertigol i lawr downward-sideways i lawr ac i'r ochr downwarp crychiad i lawr downwarps crychiad i lawr dowried gwaddoledig dowry gwaddol draft drafft draft drafftio draft a pattern drafftio patrwm draft document dogfen ddrafft draft documents dogfen ddrafft drafted pattern patrwm drafft drafted patterns patrwm drafft drafting paper papur drafftio drafting papers papur drafftio drafting process proses ddrafftio drafts drafft drag llusgiad drag llusgo drag bar llusgo bar (command) dragonnade erledigaeth filwrol dragonnades erledigaeth filwrol dragoon dragŵn dragoons dragŵn drags llusgiad drain draen drain draenio drainage carthffosiaeth (of sewage) drainage draeniad (in general) drainage bag bag draenio drainage bags bag draenio drainage basin dalgylch afon drainage basins dalgylch afon drainage pattern patrwm draeniad drainage patterns patrwm draeniad drainage runs dyfnder draeniau drainages carthffosiaeth (of sewage) drainages draeniad (in general) draining board astell ddiferu draining boards astell ddiferu draining paper papur diferu draining papers papur diferu drains draen drama drama drama in education drama mewn addysg dramas drama dramatic dramatig dramatic form ffurf ddramatig dramatic forms ffurf ddramatig dramatic skill sgìl dramatig dramatic skills sgìl dramatig dramatic structure strwythur dramatig dramatic structures strwythur dramatig dramatic theory theori drama dramatize dramateiddio drape gorchuddio draped backcloth cefnliain gorchuddio draped backcloths cefnliain gorchuddio draper dilledydd drapers dilledydd drapery dilladaeth draping qualities gorweddiad draught drafft draught tynfa (of ship) draught animal anifail gwedd draught animals anifail gwedd draughts drafft draughts tynfa (of ship) draughtsman drafftsmon draughtsmans drafftsmon draughtsmanship drafftsmonaeth draughtsmanships drafftsmonaeth draw lluniadu (a drawing in the technical sense) draw / paint computer system system luniadu / peintio ar gyfrifiadur draw / paint computer systems system luniadu / peintio ar gyfrifiadur draw a cross-section llunio trawstoriad draw a line tynnu llinell draw a picture tynnu llun draw a tangent tynnu tangiad draw a thread tynnu edau draw attention tynnu sylw (to) draw conclusions tynnu casgliadau draw down tynnu lawr draw leaf table bwrdd dalen estynedig draw leaf tables bwrdd dalen estynedig draw off tapio draw plate plât tynnu draw plates plât tynnu draw spike sbigyn tynnu draw spikes sbigyn tynnu draw to scale lluniadu wrth raddfa draw tongs gefel dynnu draw-a-man test prawf tynnu llun person draw-a-man tests prawf tynnu llun person drawbolt tynfollt drawbolts tynfollt drawboring darforio drawbridge pont godi drawbridges pont godi drawer drôr drawer and cupboard pulls dolennau droriau a chypyrddau drawer base gwaelod drôr drawer bases gwaelod drôr drawer bearer cynhalydd drôr drawer bearers cynhalydd drôr drawer bottom gwaelod drôr drawer bottoms gwaelod drôr drawer construction adeiladwaith drôr drawer constructions adeiladwaith drôr drawer guide rhedwr drôr drawer guides rhedwr drôr drawer joint uniad drôr drawer joints uniad drôr drawer lock clo drôr drawer lock chisel cŷn clo drôr drawer lock chisels cŷn clo drôr drawer locks clo drôr drawer opening agoriad drôr drawer openings agoriad drôr drawer rail rheilen ddrôr drawer rails rheilen ddrôr drawer runner rhedwr drôr drawer runners rhedwr drôr drawer side ochr ddrôr drawer sides ochr ddrôr drawer slip drôr-gryfhawr drawer slips drôr-gryfhawr drawers drôr drawfiling darffeilio drawing llun (in general) drawing lluniad (in technical sense) drawing convention confensiwn lluniadu drawing conventions confensiwn lluniadu drawing down tynnu lawr (forging process) drawing ink inc lluniadu drawing inks inc lluniadu drawing instruments offer lluniadu drawing pencil pensil lluniadu drawing pencils pensil lluniadu drawing technique techneg luniadu drawing techniques techneg luniadu drawing-board bwrdd lluniadu drawing-board clamp clamp bwrdd lluniadu drawing-board clamps clamp bwrdd lluniadu drawing-board clip clip bwrdd lluniadu drawing-board clips clip bwrdd lluniadu drawing-boards bwrdd lluniadu drawing-paper papur lluniadu drawing-papers papur lluniadu drawing-pin pìn bawd drawing-pins pìn bawd drawings llun (in general) drawings lluniad (in technical sense) drawknife cyllell ddeugarn drawknifes cyllell ddeugarn drawn fabric embroidery brodwaith ffabrig drawn game gêm gyfartal drawn games gêm gyfartal drawn line llinelliad drawn lines llinelliad drawn thread embroidery brodwaith tynnu edau drawsheet cynfas dynnu drawsheets cynfas dynnu drawstring llinyn tynnu drawstrings llinyn tynnu dredge carthu dredger llong garthu (=dredging ship) dredger sgeintydd (for sprinkling) dredgers llong garthu (=dredging ship) dredgers sgeintydd (for sprinkling) dress ffrog (=frock) dress gwisg (=clothing) dress gwisgo dress trin (in cooking) dress placket opening agoriad placed ffrog dress placket openings agoriad placed ffrog dress sense chwaeth gwisgo dress senses chwaeth gwisgo dress shield pad chwys dress shields pad chwys dress the set gwisgo'r set dress the stage gwisgo'r llwyfan dress weight pwysau ffrog dresser dreser (furniture) dressers dreser (furniture) dressing dresin (for salad) dressing gorchudd (on wound) dressing gown gŵn tŷ dressing gowns gŵn tŷ dressing table bwrdd gwisgo dressing tables bwrdd gwisgo dressing up gwisgo dressings dresin (for salad) dressings gorchudd (on wound) dressmaker gwniyddes dressmaker's dummy model gwniyddes dressmaker's pin pìn bach dressmaker's pins pìn bach dressmakers gwniyddes dribble dribl (in sport) dribble driblo (in sport) dribble glafoerio (saliva) dribbler driblwr dribblers driblwr dribbles dribl (in sport) dried fruits ffrwythau sych dried milk llaeth powdr dried milks llaeth powdr drier sychydd driers sychydd drift drifft (longshore) drift drifftio (fishing) drift lluwch (of snow etc) drift net rhwyd ddrifft drift nets rhwyd ddrifft drift velocity cyflymder drifft drifter driffter (ship) drifters driffter (ship) drifting drifftio (forging process) drifting gwneud tyllau (of holes) drifts drifft (longshore) drifts lluwch (of snow etc) driftwood broc driftwoods broc drill dril drill drilio drill bit ebill dril drill bits ebill dril drill chuck crafanc dril drill chucks crafanc dril drill part rhan dril drill parts rhan dril drill size maint dril drill sizes maint dril drill socket soced dril drill sockets soced dril drill table bwrdd drilio drill tables bwrdd drilio driller driliwr drillers driliwr drilling capacity maint drilio drilling jig jig drilio drilling jigs jig drilio drilling machine peiriant drilio drilling machines peiriant drilio drills dril drinking chocolate siocled yfed drinking chocolates siocled yfed drip rings modrwyau drip tray hambwrdd diferu (for drip-dry and synthetics) drip-dry dripsych drip-dry dripsychu dripping toddion dripstone bargodfaen dripstones bargodfaen drive curo (a nail) drive dreif (in sport) drive gyriad (act of) drive gyriant (of car, computer etc) drive gyrru (in general) drive the ball dreifio'r bêl driver gyrrwr driver and driven gyrru a gyredig driver cell cell yrru driver cells cell yrru driver circuit cylched yrru driver circuits cylched yrru drivers gyrrwr drives dreif (in sport) drives gyriad (act of) drives gyriant (of car, computer etc) driving belt belt yrru driving belts belt yrru driving disk disg gyrru driving disks disg gyrru driving dog cariwr driving dogs cariwr driving fit ffit orwasg driving fits ffit orwasg driving plate plât troi driving plates plât troi drizzle glaw mân drizzles glaw mân drone drôn drone accompaniment cyfeiliant drôn drone accompaniments cyfeiliant drôn drone bass bas drôn drones drôn drop cwymp (=fall) drop diferu (of liquid) drop diferyn (of liquid) drop gollwng (a ball) drop forging delw ofannu drop goal gôl adlam drop goals gôl adlam drop kick cic adlam drop kicks cic adlam drop out adlamu allan (of ball) drop pattern patrwm disgyn drop patterns patrwm disgyn drop shot ergyd gwta drop shots ergyd gwta drop-down door drws gostwng drop-down doors drws gostwng drop-leaf table bwrdd dalen blyg drop-leaf tables bwrdd dalen blyg droplet defnyn droplet infection heintiad defnynnau droplet infections heintiad defnynnau droplets defnyn dropped ball pêl gwymp dropped balls pêl gwymp dropped shoulder ysgwydd isel dropped shoulders ysgwydd isel dropper diferydd droppers diferydd dropping funnel twndis diferu dropping funnels twndis diferu dropping the atomic bomb gollwng y bom atomig drops cwymp (=fall) drops diferyn (of liquid) drops of blood dafnau gwaed drops of moisture dafnau hylif dross amhuredd drought sychder droughts sychder drover porthmon drovers porthmon drowned valley dyffryn boddedig drowsy swrth drug cyffur drug abuse camddefnyddio cyffuriau drug addiction caethiwed i gyffuriau drug addictions caethiwed i gyffuriau drug administration gweini cyffuriau drug dependency dibyniaeth ar gyffuriau drug levels lefelau cyffuriau drug resistance ymwrthiant cyffuriau drug resistances ymwrthiant cyffuriau drugs cyffur drugs and alcohol cyffuriau ac alcohol druid derwydd druidism derwyddiaeth druidisms derwyddiaeth druids derwydd drum drwm drum and sticks drwm a ffyn drum kit offer drymiau drum printer argraffydd drwm drum printers argraffydd drwm drum roll bwrlwm drwm drum rolls bwrlwm drwm drumlin drymlin drumlins drymlin drummer drymiwr drummers drymiwr drums drwm drunk meddw drunk meddwyn drunken saw llif chwil drunken saws llif chwil drunken screw sgriw chwil drunken screws sgriw chwil drunken thread edau chwil drunken threads edau chwil drunks meddwyn drupe drŵp drupes drŵp druxiness marc gwyn mewn pren dry sych dry sychu dry brush brwsh sych dry brushs brwsh sych dry cleaned sychlan dry cleaners sychlanhawyr dry cleaning sychlanhau dry colourant lliwydd sych dry colourants lliwydd sych dry frying ffrio sych dry point engraving ysgythriad sychbwynt dry point engravings ysgythriad sychbwynt dry point site safle sych dry point sites safle sych dry rot pydredd sych dry rots pydredd sych dry run rhediad ffug dry runs rhediad ffug dry transfer lettering llythrennu troslun sych dry valley dyffryn sych dry weight pwysau sych dry-bright polish llathr disgleirsych dry-bright polishs llathr disgleirsych drying agent cyfrwng sychu drying agents cyfrwng sychu drying cabinet cwpwrdd sychu drying cabinets cwpwrdd sychu drying process proses sychu drying rack rhesel sychu drying racks rhesel sychu drying time amser sychu drying times amser sychu drypoint etching ysgythru sychbwynt dual deuol dual alliance cynghrair ddeublyg dual alliances cynghrair ddeublyg dual carriageway ffordd ddeuol dual ownership perchenogaeth ddeublyg dual ownerships perchenogaeth ddeublyg dual purpose pwrpas deublyg dual purposes pwrpas deublyg dual sensory impairment nam ar ddau synnwyr dual sensory impairments nam ar ddau synnwyr dualism deuoliaeth dualisms deuoliaeth dubbing tros-seinio (of sound) dubbing trosleisio (of speech translation) ducal dugol duchess duges duchesse set matiau duchesse duchy dugaeth duck hwyaden duck dive deif hwyaden duck dives deif hwyaden duck-board bwrdd cerdded duck-boards bwrdd cerdded ducking dowcio ducking stool stôl drochi ducking stools stôl drochi ducks hwyaden duct dwythell ductile hydwyth ductility hydwythedd ductless diddwythell ductless gland chwarren ddiddwythell ductless glands chwarren ddiddwythell ducts dwythell duel gornest duels gornest duet deuawd duets deuawd dugout twll ymochel dugouts twll ymochel duke dug dukedom dugaeth dukedoms dugaeth dukes dug dukka dukka (=dukha) dukkas dukka (=dukha) dulciana dulciana dulcianas dulciana dulcimer dwlsimer dulcimers dwlsimer dulcitone dylsiton dulcitones dylsiton duly yn briodol (=as is right) duma dwma dumas dwma dumb child plentyn mud dumb childs plentyn mud dumb terminal terfynell fud dumb terminals terfynell fud dummy dymi (for sucking) dummy ffugiad (=false pass) dummy ffugio dummy pipe pibell fud (on organ) dummy pipes pibell fud (on organ) dump dympio dump tomen dumpling twmplen dumplings twmplen dumps tomen dune twyn dune community cymuned dwyni dune slack llac twyni dune slacks llac twyni dunes twyn dungarees dyngarîs dungeon dwnsiwn dungeons dwnsiwn duodecimal deuddegol duodenum dwodenwm duodenums dwodenwm duple dyblyg duple minor set set ddeubar duple minor sets set ddeubar duple time amser dau duple times amser dau duplet dwbled duplets dwbled duplex dwplecs duplexes dwplecs duplicate dyblyg duplicate dyblygeb duplicate dyblygu duplicates dyblygeb duplication dyblygiad duplications dyblygiad durability gwydnwch durable gwydn durable colour lliw sy'n para durable colours lliw sy'n para durable goods nwyddau sy'n para duralumin dwralwmin duralumins dwralwmin duramen dwramen duramens dwramen duration amser parhad (of heart beat) duration parhad durations amser parhad (of heart beat) durations parhad duricrust cramen galed duricrusts cramen galed dust llwch dust tynnu llwch dust board bwrdd llwch (drawer) dust boards bwrdd llwch (drawer) dust bowl powlen lwch dust bowls powlen lwch dust devil cythraul llwch dust devils cythraul llwch dust free atmosphere atmosffer di-lwch dust free atmospheres atmosffer di-lwch dust particle gronyn llwch dust particles gronyn llwch dust-free di-lwch dust-proof rhydd o lwch dustbin bin sbwriel dustbins bin sbwriel dustpan padell lwch dustpans padell lwch dusts llwch dusty llychlyd duty toll (=tax) duty of care dyletswydd gofal duty officer swyddog dyletswydd duty officers swyddog dyletswydd duumvir deuwriad duumvirate deuwraeth duumvirates deuwraeth duumvirs deuwriad duvet duvet duvets duvet duxelles duxelles dwarf pea corbysen dwarf peas corbysen dwarf plant corblanhigyn dwarf plants corblanhigyn dwarf shrub corwrych dwarf shrubs corwrych dwarf star seren gorrach dwarf stars seren gorrach dwarf willow corhelygen dwarf willows corhelygen dwarfism corachedd dwarfisms corachedd dwell angle ongl breswyl dwell angles ongl breswyl dwelling annedd dwellings annedd dyad deuad dyads deuad dye llifo dye llifyn dye fix sefydlyn llifyn dye fixes sefydlyn llifyn dye loss colli llifyn dye pick-up codi llifyn dyebath baddon llifo dyebaths baddon llifo dyed llifedig dyed cane gwialen liw dyed canes gwialen liw dyed hessian hesian llifedig dyed hessians hesian llifedig dyed seagrass morwellt llifedig dyed string llinyn llifedig dyed strings llinyn llifedig dyestuff defnydd llifo dyestuffs defnydd llifo dyke clawdd (=wall) dyke deic (in geology) dyke ffos (=ditch) dyke morglawdd (=sea wall) dyke swarm clwstwr deiciau dyke swarms clwstwr deiciau dykes clawdd (=wall) dykes deic (in geology) dykes ffos (=ditch) dykes morglawdd (=sea wall) dynamic dynamig dynamic allocation dyrannu dynamig dynamic data structure strwythur data dynamig dynamic data structures strwythur data dynamig dynamic equilibrium ecwilibriwm dynamig dynamic equilibriums ecwilibriwm dynamig dynamic memory cof dynamig dynamic random access memory cof hapgyrch dynamig (DRAM) dynamic screen sgrin ddynamig dynamic screens sgrin ddynamig dynamic store storfa ddynamig dynamic stores storfa ddynamig dynamical dynamegol dynamics dynameg dynamite dynameit dynamites dynameit dynamo dynamo dynamometer dynamometr dynamometers dynamometr dynastic llinachyddol dynasticism llinachyddiaeth dynasticisms llinachyddiaeth dynasty llinach dynatron dynatron dynatrons dynatron dysarthria parlys lleferydd dysarthrias parlys lleferydd dysentery dysentri dysfluency diffyg rhuglder dysfunction camweithrediad dysfunctions camweithrediad dyslexia dyslecsia dyslexias dyslecsia dyslexic dyslecsig dyspepsia diffyg traul dyspepsias diffyg traul dyspeptic dyspeptig dysphasia dysffasia dysphasias dysffasia dyspnoea dyspnoea dyspnoeas dyspnoea dysprosium dysprosiwm (Dy) dysprosiums dysprosiwm (Dy) dystrophic camfaethol dystrophy nychdod (in physiology) début début débuts début décor décor décors décor e-mail e-bost (of medium) e-mail e-hebiaeth (of mail sent or received) e-mail e-hebu (=correspond by email) e-mails e-bost (of medium) e-mails e-hebiaeth (of mail sent or received) eager awyddus ear clust ear discharge rhedlif clust ear discharges rhedlif clust ear drum tympan y glust ear drums tympan y glust ear flick plwc clust ear flicks plwc clust ear ossicle esgyrnyn y glust ear ossicles esgyrnyn y glust earache clust dost earaches clust dost eardrum pilen y glust eardrums pilen y glust earl iarll earldom iarllaeth earldoms iarllaeth earls iarll early adolescence llencyndod cynnar early adolescences llencyndod cynnar early adopter mabwysiadwr cynnar early adopters mabwysiadwr cynnar early childhood plentyndod cynnar early childhoods plentyndod cynnar early history hanes cynnar early modern history hanes modern cynnar early modern period cyfnod modern cynnar early modern periods cyfnod modern cynnar early modern world byd modern cynnar early modern worlds byd modern cynnar early peoples pobloedd cynnar early years blynyddoedd cynnar early years education service gwasanaeth addysg blynyddoedd cynnar early years education services gwasanaeth addysg blynyddoedd cynnar early years learning dysgu blynyddoedd cynnar early years worker gweithiwr blynyddoedd cynnar early years workers gweithiwr blynyddoedd cynnar earmark clustnodi earmarked funding cyllid a glustnodwyd earmarked fundings cyllid a glustnodwyd earned income incwm gwaith earned incomes incwm gwaith earnings enillion earphone ffôn clust earphones ffôn clust earring clustdlws earrings clustdlws earth daear (of land) earth daearu earth pridd (=soil) earth flow tirlif earth flows tirlif earth movement symudiad daear earth movements symudiad daear earth tremor daeargryd earth tremors daeargryd earth wire gwifren ddaearu earth wires gwifren ddaearu earthenware llestri pridd earthing daearu earthquake daeargryn earthquake hazard perygl o ddaeargryn earthquake hazards perygl o ddaeargryn earthquakes daeargryn earths daear (of land) earths pridd (=soil) earthshine llewyrch daear earthshines llewyrch daear earthwork gwrthglawdd earthworks gwrthglawdd ease esmwythder ease esmwytho (easing of fullness) ease lleddfu ease of flow rhwyddineb llifo ease of formation rhwyddineb ffurfiant easel îsl easel tray hambwrdd îsl easels îsl eases esmwythder east dwyrain eastern margins glandiroedd dwyreiniol easting dwyreiniad eastings dwyreiniad easts dwyrain easy hawdd easy solder sodr rhwydd easy solders sodr rhwydd easy-flo solder sodr llifrwydd easy-flo solders sodr llifrwydd eaves bondo ebb trai ebonizing eboneiddio ebony eboni ebony stain staen eboni ebony stains staen eboni ebullioscopic ebwliosgopig ebullioscopy ebwliosgopaeth ebullition byrlymu eccentric echreiddig (of geometrical figures, ellipses) eccentric centre allganol eccentric centres allganol eccentric circle allgylch eccentric circles allgylch eccentric disc disg echreiddig eccentric discs disg echreiddig eccentricity echreiddiad ecclesiastical eglwysig ecclesiastical canon canon eglwysig ecclesiastical canons canon eglwysig ecclesiastical embroidery brodwaith eglwysig ecclesiastical history hanes eglwysig ecclesiastical mode modd eglwysig ecclesiastical modes modd eglwysig ecclesiasticism eglwysyddiaeth ecclesiasticisms eglwysyddiaeth ecdysis ecdysis echelon echelon echelon form ffurf echelon echelon forms ffurf echelon echelons echelon echinoderm echinoderm echinoderms echinoderm echo atsain echo atseinio echo chorus côr atsain echo game gêm atsain echo games gêm atsain echo organ organ atsain echo organs organ atsain echolalia ecolalia echolalias ecolalia echolalic speech lleferydd ecolalig echolalic speeches lleferydd ecolalig eclair eclair eclairs eclair eclectic eclectig eclipse diffyg (of sun, moon) eclipsed conformation cydffurfiad gorchuddiedig eclipsed conformations cydffurfiad gorchuddiedig eclipses diffyg (of sun, moon) ecliptic ecliptig ecliptic plane plân ecliptig ecliptic planes plân ecliptig eclogue bugeilgerdd eclogues bugeilgerdd ecocline ecoclin ecoclines ecoclin ecological ecolegol ecological pattern patrwm ecolegol ecological patterns patrwm ecolegol ecology ecoleg econometrics econometreg economic economaidd economic activity gweithgaredd economaidd economic and industrial understanding dealltwriaeth economaidd a diwydiannol economic and industrial understandings dealltwriaeth economaidd a diwydiannol economic cost cost economaidd economic costs cost economaidd economic development datblygu economaidd economic factor ffactor economaidd economic factors ffactor economaidd economic goods nwyddau economaidd economic growth twf economaidd economic growths twf economaidd economic history hanes economaidd economic prosperity ffyniant economaidd economic recovery adferiad economaidd economic rent rhent economaidd economic rents rhent economaidd economical darbodus (=frugal) economically developing country gwlad sy'n datblygu'n economaidd economics economeg economics of education economeg addysgu economies of scale darbodion maint economist economegydd economists economegydd economize gwneud arbedion economy economi ecospecies ecorywogaeth ecosystem ecosystem ecosystems ecosystem ecotone cyffindir ecotone ecotôn ecotones cyffindir ecotones ecotôn ecotype ecoteip ecotypes ecoteip ectoderm ectoderm ectoderms ectoderm ectoparasite ectoparasit ectoparasites ectoparasit ectoplasm ectoplasm ectoplasms ectoplasm ecumene byd cyfannedd, y ecumenes byd cyfannedd, y ecumenical eciwmenaidd ecumenical movement mudiad eciwmenaidd ecumenical movements mudiad eciwmenaidd ecumenism eciwmeniaeth ecumenisms eciwmeniaeth eczema ecsema eczemas ecsema edaphic edaffig eddy trolif eddy trolifo eddy current cerrynt trolif eddy currents cerrynt trolif edge min (=sharpness) edge ymyl (=rim, side) edge ymylu edge detection canfod ymyl edge guide ffin-ganllaw edge guides ffin-ganllaw edge joint uniad ymyl edge jointing ymyluno edge joints uniad ymyl edge mark marc ymyl edge marks marc ymyl edge stitch ymylbwytho edge to edge ymyl wrth ymyl edge treatment triniaeth ymyl edge treatments triniaeth ymyl edged tools offer miniog edges min (=sharpness) edges ymyl (=rim, side) edging ymylwaith edgings ymylwaith edict cyhoeddeb edicts cyhoeddeb edit golygu edition argraffiad editions argraffiad editor golygydd editors golygydd educability addysgedd educable addysgadwy education addysg education authority awdurdod addysg education committee pwyllgor addysg education committees pwyllgor addysg education officer swyddog addysg education officers swyddog addysg education priority area ardal o flaenoriaeth addysgol education priority areas ardal o flaenoriaeth addysgol education welfare officer swyddog lles addysg education welfare officers swyddog lles addysg educational addysgol educational advantage mantais addysgol educational advantages mantais addysgol educational approach dull addysgol educational approaches dull addysgol educational development datblygiad addysgol educational developments datblygiad addysgol educational facilities cyfleusterau addysgol educational guidance cyfarwyddyd addysgol educational guidances cyfarwyddyd addysgol educational gymnastics gymnasteg addysgol educational needs anghenion addysgol educational psychologist seicolegydd addysg educational psychologists seicolegydd addysg educational quotient cyniferydd addysgol educational quotients cyniferydd addysgol educational support grant grant cynnal addysg educational support grants grant cynnal addysg educational toy tegan addysgol educationalist addysgwr educationalists addysgwr educations addysg educative addysgiadol educe edwytho eduction edwythiad eductions edwythiad eel llysywen eelpout gweflogyn eelpouts gweflogyn effect effaith effect of frequency effaith amledd effect of pollution effaith llygredd effective effeithiol effective movement symudiad effeithiol effective movements symudiad effeithiol effective performance perfformiad effeithiol effective performances perfformiad effeithiol effective rainfall glawiad effeithiol effective rainfalls glawiad effeithiol effective response ymateb effeithiol effective responses ymateb effeithiol effectiveness effeithiolrwydd effector effeithydd effectors effeithydd effects effaith efferent echddygol efferent nerve nerf echddygol efferent nerves nerf echddygol efferent neuron niwron echddygol efferent neurons niwron echddygol effervesce eferwi effervescence eferwad effervescences eferwad effervescing eferwol efficiency effeithlonrwydd (in general) efficiency and effectiveness effeithlonrwydd ac effeithiolrwydd efficiency savings arbedion effeithlonrwydd efficient effeithlon efficient cause achos effeithlon efficient causes achos effeithlon effigy arddelw efflorescence ewlychiad efflorescences ewlychiad efflorescent ewlychol effluence elifiant effluences elifiant effluent carthffrwd (of sewage) effluent elifol effluent elifyn (in general) effluents carthffrwd (of sewage) effluents elifyn (in general) effort ymdrech efforts ymdrech egalitarian egalitaraidd egalitarian egalitariad egalitarianism egalitariaeth egalitarianisms egalitariaeth egalitarians egalitariad egest carthu egestion allfwrw (amoeba) egestion carthiad (digestive tract) egestions carthiad (digestive tract) egg wy egg and dart treatment addurn wy a saethell egg and dart treatments addurn wy a saethell egg cup cwpan wy egg cups cwpan wy egg custard cwstard wy egg custard sauce saws cwstard wy egg custard sauces saws cwstard wy egg custard tart tarten gwstard wy egg custard tarts tarten gwstard wy egg custards cwstard wy egg formation ffurfiant wy egg formations ffurfiant wy egg membrane pilen wy egg membranes pilen wy egg nucleus cnewyllyn wy egg shape ar ffurf wy egg tempera tempera wy egg temperas tempera wy egg yolk melynwy egg yolks melynwy egg-shaped head pen ffurf wy egg-shaped heads pen ffurf wy eggshell plisgyn wy eggshell finish gorffeniad plisgyn wy eggshell finishs gorffeniad plisgyn wy eggshell paint paent plisgyn wy eggshell paints paent plisgyn wy eggshell porcelain porslen plisgyn wy eggshell porcelains porslen plisgyn wy eggshells plisgyn wy egocentric myfïol egocentricity myfïaeth eiderdown cwrlid plu eiderdowns cwrlid plu eigen function ffwythiant eigen eigen functions ffwythiant eigen eigen value gwerth eigen eigen values gwerth eigen eigen vector fector eigen eigen vectors fector eigen eight wyth eight wythwr (of person) eight bit buffer byffer wyth did eight bit buffers byffer wyth did eight points of the compass wyth pwynt y cwmpawd eighth wythfed (interval) eighth-note nodyn wyth (quaver) eighth-notes nodyn wyth (quaver) eighths wythfed (interval) eights wyth eights wythwr (of person) einsteinium einsteiniwm (Es) einsteiniums einsteiniwm (Es) eisteddfod eisteddfod eisteddfods eisteddfod either way offence trosedd neillfordd either way offences trosedd neillfordd ejaculate alldaflu ejaculation alldafliad (in physiology) ejaculations alldafliad (in physiology) ejaculatory alldaflol eject bwrw allan ejection allfwriad ejections allfwriad ejector drift drifft llacio ejector drifts drifft llacio ekistics anheddeg elaborate coeth (of work of art) elaborate coethi (a work of art) elaborate manwl (=detailed) elaborate manylu (=detail) elapsed time amser a aeth heibio elapsed times amser a aeth heibio elastic elastig elastic band band elastig elastic bands band elastig elastic energy egni elastig elastic fibre ffibr elastig elastic fibres ffibr elastig elastic limit terfan elastig elastic limits terfan elastig elastic potential energy egni potensial elastig elastic recoil adlamiad elastig elastic recoils adlamiad elastig elastic scattering gwasgariad elastig elastic scatterings gwasgariad elastig elasticity elastigedd (of material, in economics) elasticity of demand elastigedd y galw elastics elastig elastine elastin elastines elastin elastomeric elastomerig elastomers elastomerau elation ymlediad (in physics) elations ymlediad (in physics) elbow penelin elbow joint cymal penelin elbow joints cymal penelin elbow of capture elin ladrad elbows penelin elder henuriad elder statesman gwladweinydd hŷn elder statesmans gwladweinydd hŷn elderly henoed elderly oedrannus elderly visitor ymwelydd oedrannus elderly visitors ymwelydd oedrannus elders henuriad elect ethol elect etholedig elect etholedig rai election etholiad elections etholiad elective monarchy brenhiniaeth etholedig elective mutism dewis peidio â siarad elector etholwr electoral etholiadol electoral machinery peirianwaith etholiadol electoral reform diwygio etholiadol electoral representation cynrychiolaeth etholiadol electoral representations cynrychiolaeth etholiadol electoral system trefn etholiadol electoral systems trefn etholiadol electorate etholwyr electors etholwr electric trydan electric trydanol electric arc furnace ffwrnais arc drydan electric arc furnaces ffwrnais arc drydan electric arc welding weldio arc drydan electric blanket blanced drydan electric blankets blanced drydan electric blue glas trydan (enamelling colour) electric blues glas trydan (enamelling colour) electric circuit cylched drydanol electric circuits cylched drydanol electric current cerrynt trydan electric currents cerrynt trydan electric drill dril trydan electric drills dril trydan electric element elfen drydan electric elements elfen drydan electric field line llinell faes drydanol electric field lines llinell faes drydanol electric field meter mesurydd maes trydanol electric field meters mesurydd maes trydanol electric finishing stove stof orffennu drydan electric finishing stoves stof orffennu drydan electric flex fflecs drydan electric flexes fflecs drydan electric force of attraction grym atyniad trydanol electric force of repulsion grym gwrthyriad trydanol electric fuse ffiws trydan electric fuses ffiws trydan electric guitar gitâr drydan electric guitars gitâr drydan electric iron haearn trydan electric irons haearn trydan electric kiln odyn drydan electric kilns odyn drydan electric motor modur trydan electric motors modur trydan electric musical instrument offeryn cerdd trydan electric musical instruments offeryn cerdd trydan electric organ organ drydan electric organs organ drydan electric plane plaen trydan electric planes plaen trydan electric plug plwg trydan electric plugs plwg trydan electric potential difference gwahaniaeth potensial trydanol electric potential differences gwahaniaeth potensial trydanol electric power pŵer trydanol electric power point pwynt trydan electric power points pwynt trydan electric powers pŵer trydanol electric shock sioc drydan electric shocks sioc drydan electric socket soced trydan electric sockets soced trydan electric spot welding sbotweldio trydan electric storage heater gwresogydd stôr trydan electric storage heaters gwresogydd stôr trydan electric terminal terfynell drydan electric terminals terfynell drydan electrical trydanol electrical appliance dyfais drydanol electrical appliances dyfais drydanol electrical component cydran drydanol electrical components cydran drydanol electrical generator generadur trydan electrical generators generadur trydan electrical insulator ynysydd trydanol electrical insulators ynysydd trydanol electrical resistance gwrthiant trydanol electrical resistances gwrthiant trydanol electrician trydanwr electrician's insulated pliers gefelen ynysedig trydanwr electrician's screwdriver tyrnsgriw trydanwr electrician's screwdrivers tyrnsgriw trydanwr electricians trydanwr electricity trydan electricity supply cyflenwad trydan electricity transmission line lein trawsyrru trydan electricity transmission lines lein trawsyrru trydan electrics trydan electrify trydanu electroacoustic equipment cyfarpar electroacwstig electroacoustic equipments cyfarpar electroacwstig electrochemical electrocemegol electrochemical electrocemegyn electrochemical equivalent cywerth electrocemegol electrochemical equivalents cywerth electrocemegol electrochemicals electrocemegyn electrode electrod electrodes electrod electrolyse electroleiddio electrolysis electrolysis electrolyte electrolyt electrolytes electrolyt electrolytic electrolytig electrolytic capacitor cynhwysydd electrolytig electrolytic capacitors cynhwysydd electrolytig electrolytic reaction adwaith electrolytig electrolytic reactions adwaith electrolytig electromagnetic electromagnetig electromagnetic induction anwythiad electromagnetig electromagnetic inductions anwythiad electromagnetig electromagnetic radiation pelydriad electromagnetig electromagnetic radiations pelydriad electromagnetig electromagnetic spectrum sbectrwm electromagnetig electromagnetic spectrums sbectrwm electromagnetig electromagnetism electromagnetedd (phenomenon) electromagnetism electromagneteg (study of) electromagnetisms electromagnetedd (phenomenon) electromagnetisms electromagneteg (study of) electrometer electromedr electrometers electromedr electromotive force grym electromotif (emf) electromotive forces grym electromotif (emf) electron electron electron acceptor derbynnydd electronau electron acceptors derbynnydd electronau electron affinity affinedd electronol electron carrier cludydd electronau electron carriers cludydd electronau electron cloud cwmwl electronau electron cloud overlap gorgyffyrddiad cymylau electronau electron cloud overlaps gorgyffyrddiad cymylau electronau electron clouds cwmwl electronau electron configuration ffurfwedd electronau electron configurations ffurfwedd electronau electron delocalization dadleoliad electronau electron delocalizations dadleoliad electronau electron density distribution dosbarthiad dwysedd electronau electron density distributions dosbarthiad dwysedd electronau electron diffraction diffreithiant electronau electron diffractions diffreithiant electronau electron donor cyfrannydd electronau electron donors cyfrannydd electronau electron flow llif electronau electron flows llif electronau electron in bound state electron mewn cyflwr rhwym electron lens lens electronau electron microscope electronmicrosgop electron microscopes electronmicrosgop electron pair repulsion theory damcaniaeth gwrthyriad parau electron electron shell plisgyn electronau electron shells plisgyn electronau electron stream llif electronau electron streams llif electronau electron-deficient electron-ddiffygiol electronegative electronegatif electronegativity electronegatifedd electronic electronig electronic circuit cylched electronig electronic circuits cylched electronig electronic communicator cyfathrebwr electronig electronic communicators cyfathrebwr electronig electronic computer cyfrifiadur electronig electronic computers cyfrifiadur electronig electronic conduction dargludiad electronig electronic conductions dargludiad electronig electronic configuration ffurfwedd electronig electronic configurations ffurfwedd electronig electronic data interchange ymgyfnewid data electronig electronic data interchange EDI link cyswllt ymgyfnewid data electronig EDI electronic data interchange EDI links cyswllt ymgyfnewid data electronig EDI electronic data processing prosesu data electronig (EDP) electronic equipment offer electronig electronic funds transfer trosglwyddo cyfalaf electronig electronic information gwybodaeth electronig electronic informations gwybodaeth electronig electronic keyboard allweddell electronig electronic keyboards allweddell electronig electronic machine peiriant electronig electronic machines peiriant electronig electronic mail ehebiaeth (correspondence) electronic mails ehebiaeth (correspondence) electronic news gathering casglu newyddion yn electronig electronic organ organ electronig electronic organs organ electronig electronic sound sain electronig electronic sounds sain electronig electronic structure adeiledd electronig electronic structures adeiledd electronig electronics electroneg electronmicrograph electronmicrograff electronmicrographs electronmicrograff electrons electron electrophile electroffil electrophiles electroffil electrophilic addition adiad electroffilig electrophilic additions adiad electroffilig electrophoresis electrofforesis electrophorus electrofforws electroplate electroplat electroplate electroplatio electroplates electroplat electropositive electropositif electropositivity electropositifedd electroreceptor electrondderbynydd electroreceptors electrondderbynydd electroscope electrosgop electroscopes electrosgop electrostatic electrostatig electrostatic attraction atyniad electrostatig electrostatic attractions atyniad electrostatig electrostatic charge gwefr electrostatig electrostatic charges gwefr electrostatig electrostatic induction anwythiad electrostatig electrostatic inductions anwythiad electrostatig electrostatic phenomenon ffenomen electrostatig electrostatic phenomenons ffenomen electrostatig electrostatic potential potensial electrostatig electrostatic potentials potensial electrostatig electrostatics electrostateg electrovalent electrofalent elegy galargan element elfen element of competence elfen cymhwysedd elemental elfennaidd elementary elfennol elementary education addysg elfennol elementary educations addysg elfennol elementary entity unffurfedd elfennol elementary particle gronyn elfennol elementary particles gronyn elfennol elementary school ysgol elfennol elementary schools ysgol elfennol elements elfen elements of painting elfennau peintio elevation codiad (of boiling point) elevation golwg (of drawing) elevation view golwg anghyflawn elevation views golwg anghyflawn elevations codiad (of boiling point) elevations golwg (of drawing) elevator codwr (for grain) elevators codwr (for grain) eleven a side game gêm un ar ddeg bob ochr eleven a side games gêm un ar ddeg bob ochr eleventh unfed ar ddeg (interval) elevenths unfed ar ddeg (interval) elfinwood ellyllbren elfinwoods ellyllbren eligible cymwys eliminant dilëydd eliminants dilëydd eliminate dileu elimination bwrw allan (in biology) elimination dilead (in chemistry) elimination gwaredu (from the body) elimination by substitution dileu drwy amnewid elimination print dileubrint elimination printing dileubrintio elimination prints dileubrint elimination reaction adwaith dileu (in chemistry) elimination reactions adwaith dileu (in chemistry) eliminations dilead (in chemistry) elite elit elite elitaidd elites elit elitism elitaeth elitisms elitaeth elitist elitydd elitists elitydd ellipse elips ellipses elips ellipsoid elipsoid ellipsoidal elipsoidol ellipsoids elipsoid elliptic eliptig elliptical eliptigol elliptical arch bwa eliptigol elliptical arches bwa eliptigol elliptical flange fflans eliptigol elliptical flanges fflans eliptigol elongate hwyhau elongated hirgul elongation hwyhad elongations hwyhad eluent echludydd eluents echludydd elute echludo elution echludiad elutions echludiad eluvial echlifol eluviation echlifiant eluviations echlifiant emancipate rhyddfreinio emancipation rhyddfreiniad emancipation of the serfs rhyddfreinio'r taeogion emancipations rhyddfreiniad embargo gwaharddiad embark byrddio embassy llysgenhadaeth embayment amfae embayments amfae embed mewnblannu embedded character nod wedi'i fewnblannu embedded characters nod wedi'i fewnblannu embellishment addurniad embellishments addurniad emblem arwyddlun emblems arwyddlun emboss boglynnu embossed boglynnog embossed wallpaper papur boglynnog embossed wallpapers papur boglynnog embossing boglynwaith embossings boglynwaith embracery rhaithymyrraeth embroider brodio embroidered collage collage brodwaith embroidered collages collage brodwaith embroidered lace les wedi'i frodio embroidered laces les wedi'i frodio embroidered textiles tecstilau wedi'u brodio embroidery brodwaith embroidery cotton edau frodwaith embroidery cottons edau frodwaith embroidery frame ffrâm frodio embroidery frames ffrâm frodio embroidery needle nodwydd frodio embroidery needles nodwydd frodio embroidery scissors siswrn brodio embroidery thread edau frodio embroidery threads edau frodio embroidery wool gwlân brodio embroidery wools gwlân brodio embryo embryo embryo dune egin-dwyn embryo dunes egin-dwyn embryo sac coden embryo embryo sacs coden embryo emerald emrallt emeralds emrallt emerge dod allan emerged cyfodol emergency argyfwng emergency brys emergency protection order gorchymyn amddiffyn brys emergency protection orders gorchymyn amddiffyn brys emergency stop stop brys emergency stops stop brys emergent allddodol emergent beam paladr allddodol emergent beams paladr allddodol emergent nation cenedl ddatblygol emergent nations cenedl ddatblygol emery emeri emery cloth clwt emeri emery cloths clwt emeri emery paste past emeri emery pastes past emeri emery powder powdr emeri emery powders powdr emeri emery wheel olwyn emeri emery wheels olwyn emeri emetic cyfoglyn emetics cyfoglyn emigrant ymfudwr emigrants ymfudwr emigrate ymfudo emission spectroscopy sbectrosgopeg allyriant emission spectrum sbectrwm allyrru emission spectrums sbectrwm allyrru emissivity allyrredd emit allyrru emitter allyrrydd emitters allyrrydd emotion emosiwn emotionable stability sefydlogrwydd emosiynol emotional emosiynol emotional abuse camdriniaeth emosiynol emotional abuses camdriniaeth emosiynol emotional and behavioural difficulties anawsterau ymddygiad ac emosiwn emotional and social development datblygiad emosiynol a chymdeithasol emotional and social developments datblygiad emosiynol a chymdeithasol emotional deprivation amddifadiad emosiynol emotional deprivations amddifadiad emosiynol emotional development datblygiad emosiynol emotional developments datblygiad emosiynol emotional disturbance cythrwfl emosiynol emotional disturbances cythrwfl emosiynol emotions emosiwn empathy empathi emperor ymerawdwr emperors ymerawdwr emphasis pwyslais emphasise pwysleisio emphasized pwysleisiol empire ymerodraeth empires ymerodraeth empirical empirig empirical formula fformiwla empirig empirical formulas fformiwla empirig empirical investigation ymchwiliad empirig empirical investigations ymchwiliad empirig empirical method dull empirig empirical methods dull empirig empiricism empiriaeth empiricisms empiriaeth empiricist empirydd empiricists empirydd employ cyflogi employability cyflogadwyedd employable cyflogadwy employed cyflogedig employee gweithiwr (=worker, staff member) employee gweithiwr cyflogedig (=paid worker) employee organisation cymdeithas i weithwyr employee organisations cymdeithas i weithwyr employees gweithiwr (=worker, staff member) employees gweithiwr cyflogedig (=paid worker) employer cyflogwr employer employee relations cysylltiadau rhwng y cyflogwr a'r gweithwyr employers cyflogwr employment cyflogaeth employment appeal tribunal tribiwnlys apêl cyflogaeth employment appeal tribunals tribiwnlys apêl cyflogaeth employment contract contract cyflogaeth employment contracts contract cyflogaeth employment exchange swyddfa gyflogi employment exchanges swyddfa gyflogi employments cyflogaeth empower awdurdodi (=authorize) empower rhoi grym (clients) empowerment model model rhoi grym empowerment models model rhoi grym empress ymerodres emulate efelychu emulator efelychydd emulators efelychydd emulsification emwlseiddio emulsifier emwlsydd emulsifiers emwlsydd emulsify emwlsio emulsion paint paent emwlsiwn emulsion paints paent emwlsiwn emulsion polish llathr emwlsiwn emulsion polishs llathr emwlsiwn enable galluogi enable interrupts galluogi ymyriadau enabler galluogwr enablers galluogwr enabling act deddf alluogi enabling acts deddf alluogi enabling signal signal galluogi enabling signals signal galluogi enactive thinking meddwl enactif enamel enamel enamel enamlo enamel chips sglodion enamel enamel paint paent enamel enamel paints paent enamel enamel thread edau enamel enamel threads edau enamel enamelled enamlog enamelling colour lliw enamlo enamelling colours lliw enamlo enamelling kiln odyn enamlo enamelling kilns odyn enamlo enamels enamel enantiomer enantiomer enantiomers enantiomer enantiomorph enantiomorff enantiomorphs enantiomorff encampment gwersyllfan encampments gwersyllfan encapsulation mewngapsiwleiddio encaustic llosgliw encaustic tile teilsen losgliw encaustic tiles teilsen losgliw encircle amgylchynu encirclement amgylchyniad encirclements amgylchyniad enclave clofan enclaves clofan enclose amgáu (in letter) enclose cau (land etc) enclosed amgaeedig enclosed choir organ organ gôr gaeedig enclosed choir organs organ gôr gaeedig enclosed land tir caeedig enclosed lands tir caeedig enclosed solo organ organ solo gaeedig enclosed solo organs organ solo gaeedig enclosure lloc (archaeological) enclosure tir caeedig (=enclosed land) enclosure movement mudiad cau tiroedd enclosure movements mudiad cau tiroedd enclosures lloc (archaeological) enclosures tir caeedig (=enclosed land) encode amgodio encompass cwmpasu encourage annog encroach llechfeddiannu (upon rights) encroachment llechfeddiant (of rights) encroachments llechfeddiant (of rights) encrypt amgryptio encyclical cylchlythyr y Pab (papal) encyclicals cylchlythyr y Pab (papal) encyclopaedia gwyddoniadur encyclopaedias gwyddoniadur encyclopaedist gwyddoniadurwr encyclopaedists gwyddoniadurwr encysted cystiedig end elevation ochrolwg end elevations ochrolwg end face wyneb pen end faces wyneb pen end grain graen pen end grains graen pen end milling cutter melinwr ochr end milling cutters melinwr ochr end moraine marian terfynol end moraines marian terfynol end of dance diwedd dawns end of data diwedd y data end of field diwedd maes end of file diwedd ffeil end of job diwedd gorchwyl end of record diwedd cofnod end of run diwedd rhediad end of table talcen bwrdd end of tape diwedd tâp end of the race diwedd y ras end organ terfynolyn end organs terfynolyn end paper papur terfyn end papers papur terfyn end play llacrwydd y pen end point pwynt terfyn end point titration diweddbwynt end point titrations diweddbwynt end points pwynt terfyn end product cynnyrch terfynol end product inhibition ataliad gan gynnyrch terfynol end product inhibitions ataliad gan gynnyrch terfynol end products cynnyrch terfynol end view ochrolwg end views ochrolwg end-cutting nipper niper torri blaen end-cutting nippers niper torri blaen end-of-module test prawf diwedd modiwl end-of-module tests prawf diwedd modiwl end-point diweddbwynt end-points diweddbwynt endemic endemig endergonic endergonig endive endif endives endif endocarp endocarp endocarps endocarp endocrine endocrinaidd endocrine gland chwarren endocrin endocrine glands chwarren endocrin endocrine system system endocrin endocrine systems system endocrin endocrinology endocrinoleg endocycle endoseicl endocycles endoseicl endocyst endocyst endocysts endocyst endodermal endodermaidd endogenesis mewndarddiad endogenous mewndarddol endolymph endolymff endolymphs endolymff endometrium endometriwm endometriums endometriwm endomorphic endomorffig endoplasmic reticulum reticwlwm endoplasmig endoplasmic reticulums reticwlwm endoplasmig endorse arnodi (=write on the back of a cheque etc) endorse cadarnhau (=confirm) endorse cefnogi (=support) endorsed arnodedig endorsement arnodiad (=writing on back of cheque etc) endorsement cadarnhad (=confirmation) endorsement cefnogaeth (=support) endorsements arnodiad (=writing on back of cheque etc) endorsements cadarnhad (=confirmation) endorsements cefnogaeth (=support) endoscope endosgop endoscopes endosgop endoskeleton sgerbwd mewnol endoskeletons sgerbwd mewnol endosperm endosberm endosperms endosberm endothelium endotheliwm endotheliums endotheliwm endothermic endothermig endow gwaddoli endowed gwaddoledig endowed school ysgol waddoledig endowed schools ysgol waddoledig endowment gwaddol endowment assurance aswiriant gwaddol endowment assurances aswiriant gwaddol endowment mortgage morgais gwaddol endowment mortgages morgais gwaddol endowment policy polisi gwaddol endowments gwaddol endrumpf lledwastad terfynol endrumpfs lledwastad terfynol endurance dygnwch endurances dygnwch enema enema enemas enema enemy gelyn enemy action ymgyrch y gelyn enemy actions ymgyrch y gelyn enemy lines llinellau'r gelyn energetic egnïol energetic activity gweithgaredd egnïol energetics egnïeg energize egnioli energized egnioledig energy egni energy balance cydbwysedd egni energy balances cydbwysedd egni energy barrier rhwystr egni energy barriers rhwystr egni energy content cynnwys egni energy contents cynnwys egni energy demands gofynion egni energy efficiency effeithlonrwydd egni energy expenditure traul egni energy expenditures traul egni energy flow llif egni energy flows llif egni energy harnessing harnesu egni energy issues materion egni energy level lefel egni energy levels lefel egni energy source ffynhonnell egni energy sources ffynhonnell egni energy system system egni energy systems system egni energy transfer trosglwyddo egni energy value gwerth egni energy value of food cyfwerth egni bwyd energy values gwerth egni energy yield cynnyrch egni energy yields cynnyrch egni energy-rich bond bond egnioledig energy-rich bonds bond egnioledig enfeoff enffeodu enfold ymblygu enfolds ymblygu enfranchise rhyddfreinio engage cyweddu (the blade) engage with gweithio'n agos gyda engaged column colofn gyswllt engaged columns colofn gyswllt engagement cyrch milwrol (in war) engagement cyweddiad (in fencing) engagement ymrwymiad (commitment) engagements cyrch milwrol (in war) engagements cyweddiad (in fencing) engagements ymrwymiad (commitment) engine injan (of steam train) engine peiriant (in general) engine cylinder silindr peiriant engine cylinders silindr peiriant engine friction ffrithiant peiriant engine frictions ffrithiant peiriant engine house peiriandy (technical usage) engine house tŷ injan (historically, in quarries etc) engine houses peiriandy (technical usage) engine houses tŷ injan (historically, in quarries etc) engineer peiriannydd engineer's hammer morthwyl peiriannydd engineer's hammers morthwyl peiriannydd engineer's marking blue hylif marcio glas engineer's marking blues hylif marcio glas engineer's square sgwâr peiriannydd engineer's squares sgwâr peiriannydd engineer's vice feis peiriannydd engineer's vices feis peiriannydd engineering peirianneg engineering activities gweithgareddau peirianyddol engineering brick bricsen beirianneg engineering bricks bricsen beirianneg engineering drawing lluniad peirianegol (of produce) engineering drawing lluniadu peirianegol (of activity) engineering drawings lluniad peirianegol (of produce) engineering function swyddogaeth peirianneg engineering functions swyddogaeth peirianneg engineering industry diwydiant peirianneg engineering system system beirianegol engineering systems system beirianegol engineerings peirianneg engineers peiriannydd engines injan (of steam train) engines peiriant (in general) englacial mewnrewlifol englacial moraine marian perfedd englacial moraines marian perfedd englishry saesonaeth engrain engreinio engrave ysgythru engraved glassware llestri gwydr ysgythredig engraving ysgythriad engraving block bloc ysgythru engraving blocks bloc ysgythru engraving line llin-ysgythriad engraving lines llin-ysgythriad engraving tool erfyn ysgythru engraving tools erfyn ysgythru engravings ysgythriad engross brasgopïo (=produce a fair copy) engross braslythrennu (=reproduce in larger letters) engrossment brasgopi (=fair copy) engrossment braslythreniad (=large writing) engrossments brasgopi (=fair copy) engrossments braslythreniad (=large writing) engulf amlyncu (amoeba etc) enhance gwella enhanced gwell enharmonic enharmonig enharmonic change newid enharmonig enharmonic changes newid enharmonig enharmonic interval cyfwng enharmonig enharmonic intervals cyfwng enharmonig enharmonic note nodyn enharmonig enharmonic notes nodyn enharmonig enigma enigma enigmas enigma enjoy mwynhau enjoyment mwynhad enjoyments mwynhad enlarge helaethu enlarge a pattern helaethu patrwm enlarged image delwedd fwy enlarged images delwedd fwy enlargement helaethiad enlargement and reduction helaethu a lleihau enlargements helaethiad enlightened goleuedig enlightened absolutism absoliwtiaeth oleuedig enlightened absolutisms absoliwtiaeth oleuedig enlist ymrestru enquiry ymholiad enquiry frame ffrâm holi enquiry frames ffrâm holi enquiry question cwestiwn ymholi enquiry questions cwestiwn ymholi enrichment cyfoethogi enrol cofrestru enrolled nurse nyrs restredig enrolled nurses nyrs restredig enrolment cofrestriad enrolments cofrestriad ensemble ensemble ensembles ensemble ensign lluman (=flag) ensign llumanwr (of person) ensigns lluman (=flag) ensigns llumanwr (of person) ensure sicrhau entail entael entail enteilio entail fee ffi entael entail fees ffi entael entails entael entemophilous entemoffilaidd entente entente ententes entente enter cofrestru (for an exam) enter mynd i mewn (=go in) enter treiddio (=penetrate) enteral tube feeding bwydo gyda thiwb enteritis enteritis enterokinase enterocinas enterokinases enterocinas enterprise menter enterprise zone ardal fenter enterprise zones ardal fenter enterprises menter entertainment adloniant entertainments adloniant enthalpy enthalpi enthalpy change newid enthalpi enthalpy change of atomization newid enthalpi atomeiddiad enthalpy change of combustion newid enthalpi hylosgiad enthalpy change of formation newid enthalpi ffurfiant enthalpy change of hydration newid enthalpi hydradiad enthalpy change of neutralization newid enthalpi niwtraliad enthalpy change of solution newid enthalpi toddiant enthalpy change of sublimation newid enthalpi sychdarthiad enthalpy changes newid enthalpi enthalpy changes of formation newidiadau enthalpi ffurfiant enthalpy of vaporization enthalpi anweddiad entire cyfan entirety cyfanrwydd entitlement hawl entitlements hawl entity endid entity FAULT endid DIFFYG entity-relationship diagram diagram perthynas endidau entity-relationship diagrams diagram perthynas endidau entomology entomoleg entr'acte entr'acte entr'actes entr'acte entrance agoriad (=opening) entrance mynedfa (=way in) entrances agoriad (=opening) entrances mynedfa (=way in) entrenched meander ystum culrych entrenched meanders ystum culrych entrepreneur entrepreneur entrepreneurs entrepreneur entropy entropi entry caniad (in composition) entry cofnod (=record) entry cydiad (in ensemble) entry datganiad (in fugue) entry mynedfa (=doorway) entry mynediad (=act or instance of going in) entry point man cyflwyno (in discussion etc) entry points man cyflwyno (in discussion etc) entrée dish llestr entrée (of container) entrée dish saig entrée (of food) entrée dishs llestr entrée (of container) entrée dishs saig entrée (of food) enumerable rhifadwy enumerate rhifo enumeration rhifiad enumerations rhifiad enuresis enwresis envelope amlen envelope of straight lines amlen llinellau syth envelopes amlen environment amgylchedd environment committee pwyllgor amgylchedd environment committees pwyllgor amgylchedd environmental amgylcheddol environmental challenge her yr amgylchedd environmental challenges her yr amgylchedd environmental conservation and protection gwarchod ac amddiffyn yr amgylchedd environmental education addysg amgylcheddol environmental educations addysg amgylcheddol environmental factor ffactor amgylcheddol environmental factors ffactor amgylcheddol environmental hazard perygl amgylchedd environmental hazards perygl amgylchedd environmental health iechyd yr amgylchedd environmental healths iechyd yr amgylchedd environmental impact effaith amgylcheddol environmental impacts effaith amgylcheddol environmental pollution llygredd amgylcheddol environmental pollutions llygredd amgylcheddol environmental protection amddiffyn yr amgylchedd environmental studies astudiaethau'r amgylchedd environments amgylchedd envoy cennad enzyme ensym enzyme activator actifadydd ensym enzyme activators actifadydd ensym enzyme activity actifedd ensymig enzyme detergent glanedydd ensym enzyme detergents glanedydd ensym enzyme inhibition ataliad ensym enzyme inhibitions ataliad ensym enzyme prosthetic group grŵp prosthetig ensym enzyme prosthetic groups grŵp prosthetig ensym enzyme specificity penodolrwydd ensym enzymes ensym eosinophil eosinoffil eosinophils eosinoffil epaulette epaulette epaulettes epaulette epeiric sea môr epeirig epeiric seas môr epeirig epeirogenetic epeirogenetig ephemera effemera ephemeras effemera ephermeris effermeris epic arwrgerdd epic arwrol epicentre uwchganolbwynt epicentres uwchganolbwynt epicotyl epicotyl epicotyls epicotyl epics arwrgerdd epicyclic episeiclig epicycloid episeicloid epicycloids episeicloid epidemic epidemig epidemics epidemig epidemiological data data epidemiolegol epidermal epidermaidd epidural epidwral epidural analgesic poenleddfwr epidwral epidural analgesics poenleddfwr epidwral epigeal epigeal epiglottis epiglotis epigynous epigynol epilepsy epilepsi epileptic epileptig epileptic child plentyn epileptig epileptic childs plentyn epileptig epimerism epimeredd epimerisms epimeredd epimerization epimeru epimorphic epimorffig epipetalous epipetalog epiphysis epiffysis epiphyte epiffyt epiphytes epiffyt epiphytic epiffytig episcopacy esgobaeth episcopal esgobol episcopalian esgobaethol episcopalian esgobwr episcopalianism esgobwriaeth episcopalianisms esgobwriaeth episcopalians esgobwr episcopate esgobaeth episcopates esgobaeth episiotomy episiotomi episode atgan (in music) episode pennod (in book) episodes atgan (in music) episodes pennod (in book) episodical atganol epistle epistol epistles epistol epitaph beddargraff epitaphs beddargraff epithelial epithelaidd epithelium epitheliwm epitheliums epitheliwm epitrochoid epitrocoid epitrochoids epitrocoid epoch cyfnod epoches cyfnod epoxy epocsi epoxy resin resin epocsi epoxy resin glue glud resin epocsi epoxy resin glues glud resin epocsi epoxy resins resin epocsi epée epée epées epée equable cymedrol (of climate) equable cyson (=not varying) equal cyfartal (in general) equal hafal (in mathematics) equal unfaint (magnitude) equal addition method dull adio cyfartal equal addition methods dull adio cyfartal equal and opposite hafal a dirgroes equal area arwynebedd cyfartal equal areas arwynebedd cyfartal equal constituencies etholaethau cyfartal equal divisions rhannau unfaint equal opportunities policy polisi cyfle cyfartal equal opportunity cyfle cyfartal equal partition dosrannu cyfartal equal pay cyflog cydradd equal rights hawliau cyfartal equal sign hafalnod ( = ) equal signs hafalnod ( = ) equal stretching ymestyn cyfartal equal temperament ardymer cyfartal equal temperaments ardymer cyfartal equality cydraddoldeb (in general) equality hafaledd (mathematical) equalize cyfartalu (in general) equalize hafalu (in mathematics) equally likely yr un mor debygol equally likely principle egwyddor tebygolrwydd hafal equally likely principles egwyddor tebygolrwydd hafal equally spaced cytbell equate hafalu equation hafaliad equations hafaliad equator cyhydedd equatorial cyhydeddol equatorial projection tafluniad cyhydeddol equatorial projections tafluniad cyhydeddol equators cyhydedd equi-area projection tafluniad arwynebedd hafal equi-area projections tafluniad arwynebedd hafal equi-partition hafal-ymraniad equi-partitions hafal-ymraniad equiangular hafalonglog equidistant cytbell equidistant projection tafluniad cytbell equidistant projections tafluniad cytbell equilateral hafalochrog equilateral arch bwa hafalochrog equilateral arches bwa hafalochrog equilateral triangle triongl hafalochrog equilateral triangles triongl hafalochrog equilaterals hafalochrog equilibrate ecwilibreiddio equilibrium ecwilibriwm equilibrium concentration crynodiad ecwilibriwm equilibrium concentrations crynodiad ecwilibriwm equilibrium constant cysonyn ecwilibriwm equilibrium constants cysonyn ecwilibriwm equilibrium expression mynegiad ecwilibriwm equilibrium expressions mynegiad ecwilibriwm equilibrium position safle ecwilibriwm equilibrium positions safle ecwilibriwm equilibrium potential potensial ecwilibriwm equilibrium potentials potensial ecwilibriwm equilibrium price pris ecwilibriwm equilibrium prices pris ecwilibriwm equilibrium unemployment diweithdra ecwilibriwm equilibrium unemployments diweithdra ecwilibriwm equilibriums ecwilibriwm equinox cyhydnos equinoxes cyhydnos equipluve glawlin cymarebol equipluves glawlin cymarebol equipment cyfarpar (in general) equipment offer (for kitchen, camping) equipments cyfarpar (in general) equipotential unbotensial equispaced â lle gwag cyfartal equitable redemption adbryniad ecwitïol equitable redemptions adbryniad ecwitïol equity ecwiti (jurisdiction) equivalence cywerthedd equivalence relation perthynas cywerthedd equivalence relations perthynas cywerthedd equivalences cywerthedd equivalent cywerth equivalent cywerthydd equivalent area arwynebedd cywerth equivalent areas arwynebedd cywerth equivalent circuit cylched gywerth equivalent circuits cylched gywerth equivalent fractions ffracsiynau cywerth equivalent lens lens cywerth equivalent sets setiau cywerth equivalent systems systemau cywerth equivalent weight pwysau cywerth equivalents cywerthydd era oes erase dileu eraser dilëwr erasers dilëwr erasure dilead erasures dilead erbium erbiwm (Er) erbiums erbiwm (Er) erect codi erect unionsyth erect image delwedd unionsyth erect images delwedd unionsyth erectile tissue meinwe sythu erectile tissues meinwe sythu erection codiad (in physiology) erections codiad (in physiology) erector muscle cyhyryn sythu erector muscles cyhyryn sythu eremite ermid eremites ermid eremitical meudwyaidd ergodic ergodig ergonomic aids cymhorthion ergonomig ergonomics ergonomeg ergot mallryg ergots mallryg ermine carlwm ermines carlwm erode erydu eroded surface arwyneb erydog eroded surfaces arwyneb erydog erosion erydiad erosion platform llwyfan erydu erosion platforms llwyfan erydu erosion surface arwyneb erydiad erosion surfaces arwyneb erydiad erosions erydiad erosive erydol erosive agent erydydd erosive agents erydydd error cyfeiliornad (=amount of inaccuracy) error gwall (=mistake) error character gwallnod error characters gwallnod error checking code cod archwilio gwallau error checking codes cod archwilio gwallau error code cod gwallau error codes cod gwallau error correcting code cod cywiro gwallau error correcting codes cod cywiro gwallau error detecting code cod darganfod gwallau error detecting codes cod darganfod gwallau error diagnostics diagnosteg gwallau error handling trin gwallau error interrupt ymyriad gwall error interrupts ymyriad gwall error message neges gwall error messages neges gwall error range amrediad gwallau error ranges amrediad gwallau error routine rheolwaith gwallau error routines rheolwaith gwallau error trap magl gwallau error trapping maglu gwallau error traps magl gwallau errors cyfeiliornad (=amount of inaccuracy) errors gwall (=mistake) erupt echdorri eruption echdoriad eruptions echdoriad eruv eruv eruvs eruv erythrocyte corffilyn coch y gwaed (=corpuscle) erythrocytes corffilyn coch y gwaed (=corpuscle) escalate codi (of prices) escalate dwysáu (of conflict) escalope escalope escalopes escalope escape velocity cyflymder dianc escapement cilfa (plane) escapements cilfa (plane) escarpment sgarp escarpments sgarp eschatological myth myth eschatolegol eschatological myths myth eschatolegol eschatology eschatoleg escheat siedu escheat siêd escheator siedwr escheators siedwr escheats siêd escribed circle allgylch escribed circles allgylch escutcheon esgytsiwn escutcheon pin pìn esgytsiwn escutcheon pins pìn esgytsiwn escutcheon plate plât esgytsiwn escutcheon plates plât esgytsiwn escutcheons esgytsiwn esker esgair eskers esgair esparto esparto espionage ysbïo esquire yswain esquires yswain essay traethawd essence rhinflas essences rhinflas essential hanfodol essential boundary conditions amodau ffin hanfodol essential dimensions dimensiynau hanfodol essential note nodyn anhepgor essential notes nodyn anhepgor essential traffic trafnidiaeth hanfodol essential traffics trafnidiaeth hanfodol essentials hanfodion establish sefydlu established conservation area ardal gadwraeth sefydledig established conservation areas ardal gadwraeth sefydledig established routine trefn sefydledig established routines trefn sefydledig establishing shot llun lleoli establishing shots llun lleoli establishment sefydliad establishments sefydliad estate stad estate agent gwerthwr eiddo estate agent details manylion y gwerthwr eiddo estate agents gwerthwr eiddo estate duty treth stad estate ownership perchenogaeth stad estate ownerships perchenogaeth stad estates stad estates of the realm stadau'r deyrnas ester ester esterification esteriad esterifications esteriad esterify esteru esters ester estimate amcangyfrif estimated perspective persbectif amcangyfrifol estimated perspectives persbectif amcangyfrifol estimated uncertainty ansicrwydd amcangyfrifol estimates amcangyfrif estimation amcangyfrif (=rough calculation) estimation barn (=opinion) estimation of error amcangyfrif cyfeiliornad estimations amcangyfrif (=rough calculation) estimations barn (=opinion) estimator amcangyfrifyn estimators amcangyfrifyn estreat ystrêd estreats ystrêd estuary moryd etch ysgythru etch plain gwastadedd ysgythru etch plains gwastadedd ysgythru etched glassware llestri gwydr ysgythrog etcher ysgythrwr etchers ysgythrwr etching ysgythriad etching ground grwnd ysgythru etching grounds grwnd ysgythru etching needle nodwydd ysgythru etching needles nodwydd ysgythru etching press gwasg ysgythru etchings ysgythriad ethane ethan ethanes ethan ethanoic ethanöig ethanol ethanol ethanolic sodium hydroxide sodiwm hydrocsid ethanolig ethanolic sodium hydroxides sodiwm hydrocsid ethanolig ethanolic solution of iodomethane hydoddiant iodomethan ethanolig ethene ethen ethenes ethen ether ether ethers ether etheryser etherydd etherysers etherydd ethical moesegol ethical issue mater moesegol ethical issues mater moesegol ethical monotheism undduwiaeth foesegol ethical monotheisms undduwiaeth foesegol ethical teaching addysgu am foeseg ethical theory damcaniaeth foesegol ethics moeseg ethnic ethnig ethnic minority group grŵp lleiafrifol ethnig ethnic minority groups grŵp lleiafrifol ethnig ethnic origin tarddiad ethnig ethnic origins tarddiad ethnig ethnicity ethnigedd ethnographic area ardal ethnograffig ethnographic areas ardal ethnograffig ethnological legend chwedl ethnolegol ethnological legends chwedl ethnolegol ethnology ethnoleg ethnomusicology ethnogerddoleg ethos ethos ethyl alcohol ethyl alcohol ethyl alcohols ethyl alcohol ethyl benzenecarboxylate ethyl bensencarbocsylad ethyl benzenecarboxylates ethyl bensencarbocsylad ethyl benzoate ethyl bensoad ethyl benzoates ethyl bensoad ethyne ethyn ethynes ethyn etiolate ymheglu etiolated heglog etiolation hegledd etiolations hegledd eukaryote ewcaryot eukaryotes ewcaryot eukaryotic ewcaryotig euphonious persain euphony perseinedd euro ewro europium ewropiwm (Eu) europiums ewropiwm (Eu) eustatic ewstatig eutectic mixture cymysgedd ewtectig eutectic mixtures cymysgedd ewtectig eutectic point pwynt ewtectig eutectic points pwynt ewtectig eutectics ewtecteg euthanasia ewthanasia euthanasias ewthanasia eutherian ewtheraidd eutrophic ewtroffig eutrophication ewtroffigedd eutrophications ewtroffigedd evacuate gwagio evacuation ymgiliad evacuation procedures trefn ymgilio evacuations ymgiliad evacuee faciwî evacuees faciwî evaded cadence diweddeb annisgwyl evaded cadences diweddeb annisgwyl evagination allweiniad evaginations allweiniad evaluate cloriannu (in general) evaluate enrhifo (in mathematics) evaluate gwerthuso (in appraisal process) evaluate evidence gwerthuso tystiolaeth evaluate expressions enrhifo mynegiadau evaluation enrhifiad (in mathematics) evaluation gwerthusiad (in appraisal process) evaluation criterion maen prawf gwerthuso evaluation criterions maen prawf gwerthuso evaluations enrhifiad (in mathematics) evaluations gwerthusiad (in appraisal process) evangelical efengylaidd evangelist efengylwr evangelists efengylwr evaporate anweddu evaporating basin dysgl anweddu evaporating basins dysgl anweddu evaporation anweddiad evaporations anweddiad evapotranspiration anwedd-drydarthiad evapotranspirations anwedd-drydarthiad even llyfn even chance siawns deg even chances siawns deg even crestline briglin cyson even crestlines briglin cyson even down llyfnhau even function eil-ffwythiant even functions eil-ffwythiant even grain graen llyfn even grains graen llyfn even number eilrif even numbers eilrif even parity eilbaredd even parity check gwiriad eilbaredd even parity checks gwiriad eilbaredd even pitch pitsh llyfn even pitches pitsh llyfn even plaid plad cyson even plaids plad cyson even pressure gwasgedd llyfn even pressures gwasgedd llyfn even texture gwead llyfn even textures gwead llyfn even weave gwehyddiad llyfn even weaves gwehyddiad llyfn evening class dosbarth nos evening dress ffrog fin nos evening meal pryd o fwyd gyda'r hwyr evening meals pryd o fwyd gyda'r hwyr evens siawns deg evensong gosber evensongs gosber event cystadleuaeth (=competition) event digwyddiad (=happening) event handling trin digwyddiadau events cystadleuaeth (=competition) events digwyddiad (=happening) everglaze sglein parhaol (finish) everglazes sglein parhaol (finish) evergreen bythwyrdd evergreen coeden fythwyrdd evergreens coeden fythwyrdd eversion echdroad eversions echdroad evict troi allan evidence tystiolaeth evidences tystiolaeth evidential tystoliaethol evil drygioni evil and suffering drygioni a dioddefaint evils drygioni evolute efoliwt evolutes efoliwt evolution esblygiad evolutionary esblygiadol evolutions esblygiad evolve cynhyrchu (of gases) evolve datblygu (=develop) evolve esblygu (in biology) evolve a design datblygu cynllun evolved gases nwyon cynyrchiedig exacerbation gwaethygiad exacerbations gwaethygiad exact union exact length hyd cywir exact lengths hyd cywir exact money arian cywir exact sampling distribution dosraniad samplu union exact sampling distributions dosraniad samplu union exact size maint cywir exact sizes maint cywir exactly yn union exactness manwl gywirdeb exaggerate gorliwio exaggeration gorliwiad exaggerations gorliwiad examination archwiliad (of patient etc) examination arholiad (formal test) examination component cydran arholiad examination components cydran arholiad examination paper papur arholiad examination papers papur arholiad examination under anaesthetic archwiliad dan anaesthetig examination under anaesthetics archwiliad dan anaesthetig examinations archwiliad (of patient etc) examinations arholiad (formal test) examinations board bwrdd arholi examinations boards bwrdd arholi examine archwilio (=look closely at) examine arholi (=test in an examination) examining magistrate ynad archwiliol examining magistrates ynad archwiliol example enghraifft examples enghraifft excavate cloddio excavation cloddiad excavations cloddiad exceed bod yn fwy na excentric allganol (in biology) except eithrio exception eithriad exceptional child plentyn eithriadol exceptional childs plentyn eithriadol exceptions eithriad excess gormodedd excess demand goralw excess demands goralw excess energy gormodedd egni excess pressure gormodedd gwasgedd excess pressures gormodedd gwasgedd excessive gormodol excessive end play llacrwydd gormodol ar y pen excessive slackness llacrwydd gormodol exchange cyfnewid exchange cyfnewidfa exchange rate cyfradd gyfnewid exchange rates cyfradd gyfnewid exchange reaction adwaith cyfnewid exchange reactions adwaith cyfnewid exchange scheme cynllun cyfnewid exchange schemes cynllun cyfnewid exchangeable cyfnewidiadwy exchangeable disk disg cyfnewidiadwy exchangeable disk store storfa ddisg gyfnewidiadwy (EDS) exchangeable disk stores storfa ddisg gyfnewidiadwy (EDS) exchangeable disks disg cyfnewidiadwy exchanges cyfnewidfa exchequer trysorlys exchequers trysorlys excircle allgylch excircles allgylch excise ecseis exciseman ecseismon excisemans ecseismon excises ecseis excision toriad excisions toriad excitable cyffroadwy excitation cyffroad excitation waves tonnau cyffroad excitations cyffroad excitatory centre canolfannyn cyffroadol excitatory centres canolfannyn cyffroadol excitatory post-synaptic potential potensial ôl-synaptig cyffroadol (EPSP) excitatory post-synaptic potentials potensial ôl-synaptig cyffroadol (EPSP) excite cynhyrfu excited state cyflwr cynhyrfol excited states cyflwr cynhyrfol excitement cynnwrf excitements cynnwrf exciting cynhyrfus exclamation mark ebychnod exclamation marks ebychnod exclave allglofan exclaves allglofan exclosure gwaharddle exclosures gwaharddle exclude cau allan (=shut out) exclude gwahardd (=prohibit) excluded child plentyn wedi'i wahardd excluded childs plentyn wedi'i wahardd exclusion clause cymal eithrio exclusion clauses cymal eithrio exclusion principle egwyddor wahardd exclusion principles egwyddor wahardd exclusive anghynhwysol exclusive OR NEU anghynhwysol excommunicant ysgymunwr excommunicants ysgymunwr excommunicate ysgymuno excommunication ysgymuniad excommunications ysgymuniad excrete ysgarthu excretion ysgarthiad excretions ysgarthiad excretory ysgarthle excretory ysgarthol excretory cavity ceudod ysgarthiol excretory organ organ ysgarthu excretory organs organ ysgarthu excretory substance sylwedd ysgarthiol excretory substances sylwedd ysgarthiol executable gweithredadwy execute cyflawni (=carry into effect) execute dienyddio (=kill) execute gweithredu (=act) execute cycle cylchred weithredu execute cycles cylchred weithredu execute phase gwedd weithredu execute phases gwedd weithredu execution time amser gweithredu execution times amser gweithredu executive adran weithredol (department) executive gweithredol executive gweithredwr executive swyddog gweithredol (officer) executive body corff gweithredol executive committee pwyllgor gwaith (in general) executive committees pwyllgor gwaith (in general) executive program rhaglen oruchwylio executive programs rhaglen oruchwylio executives adran weithredol (department) executives gweithredwr executives swyddog gweithredol (officer) executor ysgutor executors ysgutor exemplar enghraifft batrymol exemplars enghraifft batrymol exempt wedi'i esgusodi (with masculine nouns) exempt wedi'i hesgusodi (with feminine nouns) exemption esgusodiad (in general) exemption rhyddhad (from income tax) exemption clause cymal eithrio exemption clauses cymal eithrio exemptions esgusodiad (in general) exemptions rhyddhad (from income tax) exercise ymarfer exercise activity gweithgaredd ymarfer corff (physical activity) exercise adherence ymlyniad at ymarfer corff (physical activity) exercise adherences ymlyniad at ymarfer corff (physical activity) exercise plan cynllun ymarfer corff (physical activity) exercise plans cynllun ymarfer corff (physical activity) exercise programme rhaglen ymarfer corff (physical activity) exercise programmes rhaglen ymarfer corff (physical activity) exercises ymarfer exergonic ecsergonig exert a force rhoi grym exhalant siphon siffon allanadlu exhalant siphons siffon allanadlu exhale allanadlu exhaled gases nwyon allanadledig exhaust disbyddu (=use up) exhaust gwacáu (evacuate) exhaust air aer gwacáu exhaust airs aer gwacáu exhaust gas nwy gwacáu exhaust manifold maniffold gwacáu exhaust manifolds maniffold gwacáu exhaust pipe pibell wacáu exhaust pipes pibell wacáu exhaust port porth gwacáu exhaust ports porth gwacáu exhaust pump pwmp gwacáu exhaust pumps pwmp gwacáu exhausted disbyddedig (of seams of coal) exhaustible disbyddadwy exhaustion gorludded exhaustions gorludded exhibit arddangos exhibition arddangosfa (display of art etc) exhibition arddangosiad (act of) exhibitions arddangosfa (display of art etc) exhibitions arddangosiad (act of) exhibitor arddangoswr exhibitors arddangoswr exhorter cymhellwr exhorters cymhellwr exhumed datgladdedig (of landform) exile alltud (in general) exile alltudio exiles alltud (in general) existence bodolaeth existence of God bodolaeth Duw existence theorem theorem bodolaeth existence theorems theorem bodolaeth existences bodolaeth existing use defnydd presennol existing uses defnydd presennol exit allanfa (=way out) exits allanfa (=way out) exocrine ecsocrin exocrine gland chwarren ecsocrin exocrine glands chwarren ecsocrin exocrines ecsocrin exogenesis alldarddiad exogenic alldarddol exogenous alldarddol exorcise bwrw allan exoskeleton sgerbwd allanol exoskeletons sgerbwd allanol exothermic ecsothermig exothermic heat gwres ecsothermig exothermic heats gwres ecsothermig exotic alldardd (of river) exotic egsotig (of plants) exotics alldardd (of river) expand ehangu expand ymledu expanded ehangedig expanded metal metel ehangedig expanded metals metel ehangedig expanding industry diwydiant ehangol expanding reamer agorell gymwysadwy expanding reamers agorell gymwysadwy expansion ehangiad expansion allowance lwfans ehangu expansion allowances lwfans ehangu expansion bolt bollt ymestyn expansion bolts bollt ymestyn expansion cloud chamber llestr niwl ehangiad expansion cloud chambers llestr niwl ehangiad expansion slot agen ehangu expansion slots agen ehangu expansions ehangiad expansive bit ebill ymledu expansive bits ebill ymledu expansivity eangolrwydd expectant mother mam feichiog expectant mothers mam feichiog expected disgwyliedig (of value) expected value gwerth disgwyliedig expected values gwerth disgwyliedig expectorant poergarthydd expectorants poergarthydd expediency buddioldeb expedition alldaith (outdoor pursuit) expedition ymgyrch (military) expeditions alldaith (outdoor pursuit) expeditions ymgyrch (military) expel alltudio (from country) expel diarddel (from institution, movement) expenditure gwariant expenditure retained gwariant a gedwir yn ôl expenditure retaineds gwariant a gedwir yn ôl expenditures gwariant expense traul expenses traul experience profiad experience of nirvana profiad o nirfana experiences profiad experiential learning dysgu drwy brofiadau experiment arbrawf experiment arbrofi experimental arbrofol experimental data data arbrofion experimental error cyfeiliornad mewn arbrawf experimental errors cyfeiliornad mewn arbrawf experimental evidence tystiolaeth arbrofol experimental evidences tystiolaeth arbrofol experimental film ffilm arbrofol experimental films ffilm arbrofol experimental method dull arbrofol experimental methods dull arbrofol experimental procedure dull o weithredu arbrawf experimental procedures dull o weithredu arbrawf experimental technique techneg arbrofi experimental techniques techneg arbrofi experimental work gwaith arbrofi experimental works gwaith arbrofi experiments arbrawf expert system system arbenigo expert systems system arbenigo expertise arbenigedd expertises arbenigedd expiration allanadliad (=breathing out) expirations allanadliad (=breathing out) expire allanadlu (=breath out) explain egluro explanation esboniad explanations esboniad explanatory diagram diagram eglurhaol explanatory diagrams diagram eglurhaol explicit echblyg (in mathematics) explicit penodol (in computing) explicit function ffwythiant echblyg (in mathematics) explicit functions ffwythiant echblyg (in mathematics) explode ffrwydro exploded taenedig (of drawing etc) exploded drawing lluniad taenedig exploded drawings lluniad taenedig exploded isometric isometrig taenedig exploded isometric view golwg isometrig taenedig exploded isometric views golwg isometrig taenedig exploded isometrics isometrig taenedig exploded sketch braslun taenedig exploded sketches braslun taenedig exploded view golwg taenedig exploded views golwg taenedig exploit datblygu (=develop) exploit ecsbloetio (=use unfairly) exploitation ecsbloetiaeth exploitation of resources datblygu adnoddau exploitations ecsbloetiaeth exploration archwiliad (of ideas) exploration fforiad (of land) exploration method dull archwilio exploration methods dull archwilio explorations archwiliad (of ideas) explorations fforiad (of land) exploratory archwiliadol exploratory behaviour gweithgaredd chwilio exploratory behaviours gweithgaredd chwilio exploratory play chwarae archwiliadol explore archwilio (ideas) explore fforio (land) explorer fforiwr explorers fforiwr explosion ffrwydrad explosions ffrwydrad explosive ffrwydrol explosive ffrwydryn explosives ffrwydryn exponent esbonydd (in mathematics) exponential esbonyddol exponential definition diffiniad esbonyddol exponential definitions diffiniad esbonyddol exponential functions ffwythiannau esbonyddol exponential phase gwedd esbonyddol exponential phases gwedd esbonyddol exponents esbonydd (in mathematics) export allforio export allforyn export duty toll allforio exporter allforiwr exporters allforiwr exports allforyn expose datgelu (facts etc) expose dinoethi (in photography) expose to light rhoi yn y golau exposed agored (to the weather) exposed noeth (in music) exposed eighth wythfed noeth exposed eighths wythfed noeth exposed fifth pumed noeth exposed fifths pumed noeth exposed octave wythfed noeth exposed octaves wythfed noeth exposition dangosiad expositions dangosiad exposure datguddiad (to air, light etc) exposure dinoethiad (in photography) exposure oerfel (=being exposed to the elements) exposures datguddiad (to air, light etc) exposures dinoethiad (in photography) exposures oerfel (=being exposed to the elements) express mynegi expression mynegiad (in mathematics, act of expressing) expression mynegiant (of ideas etc) expression ymadrodd (=phrase) expression mark marc mynegiant expression marks marc mynegiant expressionism mynegiadaeth expressionisms mynegiadaeth expressionist mynegiadol expressionist mynegiadwr expressionists mynegiadwr expressions mynegiad (in mathematics, act of expressing) expressions mynegiant (of ideas etc) expressions ymadrodd (=phrase) expressive llawn mynegiant expressive arts celfyddydau mynegiannol expressive language disorder diffyg mynegiant llafar expressive language disorders diffyg mynegiant llafar expressive movement symudiad mynegiannol expressive movements symudiad mynegiannol expressiveness mynegolrwydd expressway ffordd gyflym expropriate difeddiannu expulsion alltudiad (from country) expulsion diarddeliad (from movement) expulsion ymwthiad (in childbirth) expulsions alltudiad (from country) expulsions diarddeliad (from movement) expulsions ymwthiad (in childbirth) extempore byrfyfyr extemporization datganiad ar y pryd (performance) extemporization passage darn byrfyfyr extemporization passages darn byrfyfyr extemporizations datganiad ar y pryd (performance) extemporize datganu ar y pryd (in singing) extend estyn extend ymestyn extended day diwrnod estynedig extended family teulu estynedig extended language iaith estynedig extended languages iaith estynedig extended line llinell estynedig extended lines llinell estynedig extended modulator cyweiriadur mawr extended modulators cyweiriadur mawr extended prose rhyddiaith estynedig extended proses rhyddiaith estynedig extended reading darllen estynedig extended readings darllen estynedig extender estynnydd extenders estynnydd extensible estynadwy extension estyniad extension ymestyniad (of muscles) extension activity gweithgaredd estyn extension booklet llyfryn ymestyn extension booklets llyfryn ymestyn extension hinge colfach estyn extension hinges colfach estyn extension organ organ estyn extension organs organ estyn extension paper papur estynedig extension papers papur estynedig extension study astudiaeth estyn extensions estyniad extensions ymestyniad (of muscles) extensive eang extensive listening gwrando eang extensive reading darllen eang extensor muscle cyhyryn estyn extensor muscles cyhyryn estyn extent maint (=size) extent stent (land) extent of reaction lledaeniad yr adwaith (in chemistry) extents maint (=size) extents stent (land) exterior allanol exterior tu allan exterior angle ongl allanol exterior angles ongl allanol exterior plywood pren haenog allanol exterior plywoods pren haenog allanol exteriors tu allan exterminate difodi extermination camp gwersyll difodi extermination camps gwersyll difodi external allanol external assessment asesu allanol external assessor aseswr allanol external assessors aseswr allanol external benefit budd allanol external benefits budd allanol external bisector hanerydd allanol external bisectors hanerydd allanol external chest compression cywasgiad allanol ar y frest external chest compressions cywasgiad allanol ar y frest external circlip cylchglip allanol external circlips cylchglip allanol external communication cyfathrebu allanol external cost cost allanol external costs cost allanol external degree gradd allanol external degrees gradd allanol external examiner arholwr allanol external examiners arholwr allanol external growth twf allanol external growths twf allanol external memory cof allanol external part rhan allanol external parts rhan allanol external point pwynt allanol external points pwynt allanol external pressure gwasgedd allanol external pressures gwasgedd allanol external recruitment recriwtio allanol external respiration resbiradaeth allanol external respirations resbiradaeth allanol external validator dilysydd allanol external validators dilysydd allanol extinct diflanedig extinct volcano llosgfynydd marw extinguisher stake bonyn hirbig extinguisher stakes bonyn hirbig extort cribddeilio extorter cribddeiliwr extorters cribddeiliwr extortion cribddeiliaeth extortionate gormodol extortions cribddeiliaeth extra contractual referral achos all-gontract (ECR) extra contractual referrals achos all-gontract (ECR) extra fine mân iawn extra galactic echalaethog extra high tension tensiwn arbennig o uchel (e.h.t.) extra high tensions tensiwn arbennig o uchel (e.h.t.) extra-curricular activity gweithgaredd allgyrsiol extra-embryonic allembryonig extra-evidential alldystiolaethol extra-musical stimulus ysgogiad allgerddorol extra-nuclear allniwclear extracellular allgellog extract detholiad (=part of something) extract echdynnu extract echdynnyn (=something extracted) extract rhanfap (of map) extract rhin (of meat) extract a resource echdynnu adnodd extract water echdynnu dŵr extraction echdyniad extraction rate of flour cyfradd echdynnol blawd extractions echdyniad extractive echdynnol extractive industry diwydiant echdynnol extractor echdynnwr extractor fan gwyntyll echdynnu extractor fans gwyntyll echdynnu extractors echdynnwr extracts detholiad (=part of something) extracts echdynnyn (=something extracted) extracts rhanfap (of map) extracts rhin (of meat) extradition estraddodi extrados of an arch cromlin allanol bwa extraneous allanol (=outside) extraneous estron (=foreign) extrapolate allosod extrapolation allosodiad extrapolations allosodiad extraterritorial alldiriogaethol extreme eithaf extreme pressure oil olew gwasgedd eithaf (E.P.) extreme pressure oils olew gwasgedd eithaf (E.P.) extreme unction eneiniad olaf extreme unctions eneiniad olaf extreme value gwerth eithaf extreme values gwerth eithaf extreme west gorllewin eithaf extreme wests gorllewin eithaf extremely thankful hynod ddiolchgar extremes eithafion extremes of weather eithafion tywydd extremist eithafol extremist eithafwr extremists eithafwr extremities eithafoedd extrinsic anghynhenid extrovert allblyg extrude allwthio extrusion allwthiad extrusions allwthiad extrusive allwthiol extrusive rock craig allwthiol extrusive rocks craig allwthiol exudate archwys exudates archwys exudation archwysiad exudations archwysiad exude archwysu eye crau (=hole in needle etc) eye llygad (=organ of sight) eye bolt bollt ddolen eye bolts bollt ddolen eye contact cyswllt llygaid eye contacts cyswllt llygaid eye lens lens y llygad eye movement symudiad llygad eye movements symudiad llygad eye muscle cyhyr llygad eye muscles cyhyr llygad eye of hammer crau morthwyl eye of needle crau nodwydd eye ring cylch llygad eye rings cylch llygad eye tooth dant llygad eye tooths dant llygad eye-level llinell orwel eye-level grill gridyll uchel eye-level grills gridyll uchel eye-levels llinell orwel eyeball pelen y llygad eyeballs pelen y llygad eyebrow ael eyebrows ael eyelash blewyn amrant eyelashs blewyn amrant eyelet llygaden eyelet hole twll llygaden eyelet holes twll llygaden eyelet pliers gefelen llygaden eyelet punch tyllwr llygadennau eyelet punches tyllwr llygadennau eyelet tools offer llygadennu eyelets llygaden eyepiece sylladur (microscope) eyepiece graticule sylladur graticwl eyepiece graticules sylladur graticwl eyepieces sylladur (microscope) eyot ynysig eyots ynysig eyre cylchdaith (of justices) eyres cylchdaith (of justices) fabric ffabrig fabric colour lliw ffabrig fabric colours lliw ffabrig fabric conditioner cyflyrydd ffabrig fabric conditioners cyflyrydd ffabrig fabric craft crefft ffabrig fabric crafts crefft ffabrig fabric dressing gorchudd ffabrig fabric dressings gorchudd ffabrig fabric dye llifyn ffabrig fabric dyes llifyn ffabrig fabric medium cyfrwng ffabrig fabric mediums cyfrwng ffabrig fabric printing printio ffabrig fabric printing mallet gordd brintio ffabrig fabric printing mallets gordd brintio ffabrig fabric softener cyflyrydd ffabrig fabric softeners cyflyrydd ffabrig fabricate ffabrigo fabricated ffabrigedig fabrics ffabrig facade ffasâd facades ffasâd face wyneb face wynebu face downwards wyneb i waered face edge ymyl wyneb face edge mark marc ymyl wyneb face edge marks marc ymyl wyneb face edges ymyl wyneb face plate plât wyneb face plates plât wyneb face side ochr wyneb face sides ochr wyneb face the direction of the throw wynebu cyfeiriad y tafliad face the net wynebu'r rhwyd face to face wyneb yn wyneb face value wynebwerth face values wynebwerth face vault llofnaid wyneb face vaults llofnaid wyneb face veneer argaen wyneb face veneers argaen wyneb face-centred cubic ciwbig wyneb-ganolog face-centred cubic lattice dellten giwbig wyneb-ganolog face-centred cubic lattices dellten giwbig wyneb-ganolog faced hem hem wedi'i hwynebu faced hems hem wedi'i hwynebu faced opening agoriad wedi'i wynebu faced openings agoriad wedi'i wynebu faced plywood pren haenog wedi'i wynebu faced plywoods pren haenog wedi'i wynebu faced scalloping sgolop wedi'i wynebu faced scallopings sgolop wedi'i wynebu faceplate turning turnio ar wynebplat faces wyneb facet ffased faceted spur sbardun ffasedaidd faceted spurs sbardun ffasedaidd facets ffased facial wynebol facial nerve nerf wynebol facial nerves nerf wynebol facial plane plân wynebol facial planes plân wynebol facies gwedd facilitate hwyluso facilitated transport cludiant cynorthwyedig facilitated transports cludiant cynorthwyedig facilitator hwyluswr facilitators hwyluswr facilities cyfleusterau facilities and amenities cyfleusterau a mwynderau facility dawn (=aptitude) facility rhwyddineb (=ease, fluency) facing wynebyn facing fillet ffiled wynebu facing fillets ffiled wynebu facing left wynebu'r chwith (of lathe tools) facing right wynebu'r dde (of lathe tools) facing tool erfyn wynebu facing tools erfyn wynebu facings wynebyn facsimile ffacsimili facsimile message neges ffacs facsimile messages neges ffacs facsimile number rhif ffacs facsimile numbers rhif ffacs facsimiles ffacsimili fact ffaith faction carfan factionalism carfanyddiaeth factionalisms carfanyddiaeth factions carfan factor ffactor factor analysis dadansoddi ffactorau factorial ffactoraidd factorial ffactorial factorial ecology ecoleg ffactoraidd factorials ffactorial factorizable ffactoriadwy factorization ffactoriad factorizations ffactoriad factorize ffactorio factorize completely ffactorio yn llwyr factorizing ffactoriaeth factorizings ffactoriaeth factors ffactor factors of production ffactorau cynhyrchu factory ffatri factory farming ffermio gorddwys factory legislation deddfwriaeth ffatri factory legislations deddfwriaeth ffatri factory shop siop ffatri factory shops siop ffatri factory system trefn ffatri factory systems trefn ffatri facts ffaith facultative amryddawn (in biology) faculty cyfadran (group of subject departments) faculty cynneddf (=aptitude or inherent power) fad chwiw fade colli lliw (of colour) fade pylu (of image on screen) faeces ymgarthion faggot ffagotsen faggot stitch pwyth ffagod faggot stitches pwyth ffagod faggot weld weldiad ffagod faggot welds weldiad ffagod faggots ffagotsen faggotting ffagodwaith faggottings ffagodwaith fagotto fagotto faience faience (=pottery) faiences faience (=pottery) failure methiant failure to thrive diffyg cynnydd failures methiant faint llewyg faint llewygu faint relief tirwedd anamlwg faint reliefs tirwedd anamlwg faints llewyg fair teg fair catch daliad glân fair catches daliad glân fair ground tir teg fair grounds tir teg fair play chwarae teg fair test prawf teg fair testing profi teg fair tests prawf teg fair trading masnachu teg fairway sianel fordwyo (for shipping) fairy tale stori tylwyth teg fairy tales stori tylwyth teg faith ffydd faiths ffydd fake ffug fake ffugio fake ffugwaith fakes ffugwaith falconer hebogydd falconers hebogydd fall cwymp fall line llinell gwymp fall lines llinell gwymp fallen angel angel syrthiedig fallen angels angel syrthiedig falling rolls gostyngiad mewn nifer fallout llwch ymbelydrol (radioactive) fallouts llwch ymbelydrol (radioactive) fallow braenar (land) fallow braenaru (land) fallows braenar (land) falls cwymp false ffug (in general) false gau (of prophets etc) false attack ffug ymosod false bedding ffug haenau false close diweddeb annisgwyl false closes diweddeb annisgwyl false entry camgydiad false front ffrynt ffug (of drawer) false fronts ffrynt ffug (of drawer) false fruit ffug ffrwythyn false fruits ffug ffrwythyn false hem hem ffug false hems hem ffug false relation gau berthynas false relations gau berthynas false root gwreiddyn ffug false roots gwreiddyn ffug false tooth dant gosod false tooths dant gosod faltung ffaltwng faltungs ffaltwng familial teuluol familiar context cyd-destun cyfarwydd familiar contexts cyd-destun cyfarwydd familiarisation trip taith ymgyfarwyddo familiarisation trips taith ymgyfarwyddo familiarize oneself with ymgyfarwyddo â family teulu family allowance lwfans teulu family allowances lwfans teulu family credit credyd teulu family credits credyd teulu family doctor meddyg teulu family doctors meddyg teulu family group grŵp teulu family grouping grwpio teuluol family groups grŵp teulu family life bywyd teuluol family lifes bywyd teuluol family planning cynllunio teulu family planning clinic clinig cynllunio teulu family planning clinics clinig cynllunio teulu family practitioner meddyg teulu family practitioners meddyg teulu family psychotherapy seicotherapi teuluol family therapy therapi teulu family tree cart achau family trees cart achau famine newyn famines newyn fan bwa (=fan shaped object) fan ffan (=keen follower) fan gwyntyll (of device) fan heater tân chwythu fan heaters tân chwythu fan vaulting ffanfowt fan vaultings ffanfowt fan-fold paper papur igam ogam fan-fold papers papur igam ogam fancy ffansi (of needlework etc) fanfare ffanfer fanfares ffanfer fanglomerate bwa malurion fanglomerates bwa malurion fantasia ffantasia fantasias ffantasia fantasy ffantasi fantasy figure ffigur ffantasi fantasy figures ffigur ffantasi fantasy play chwarae ffantasi fanzine ffansîn fanzines ffansîn far pell far side ochr bellaf far sides ochr bellaf farad ffarad farads ffarad farce stwffin (=forcemeat) farces stwffin (=forcemeat) farm fferm farm ffermio farm implements offer fferm farmer ffermwr farmers ffermwr farming community cymuned amaethyddol farms fferm farthingale cylchbais farthingales cylchbais fascia ffasgau fascia board astell dywydd fascia boards astell dywydd fasciated ffasgol fasciation ffasgedd fasciations ffasgedd fascicle ffasgell fascicles ffasgell fascicular ffasgellol fascism ffasgaeth fascisms ffasgaeth fascist ffasgaidd fascist ffasgydd fascist dictator unben ffasgaidd fascist dictators unben ffasgaidd fascists ffasgydd fashion ffasiwn fashion trend gogwydd ffasiwn fashion trends gogwydd ffasiwn fashions ffasiwn fast anniflan (of colour) fast cyflym fast ympryd fast ymprydio fast access storage storfa fuangyrch fast access storages storfa fuangyrch fast ball pêl gyflym fast balls pêl gyflym fast bowler bowliwr cyflym fast bowlers bowliwr cyflym fast bowling bowlio cyflym fast colour lliw anniflan (enamelling colour) fast colours lliw anniflan (enamelling colour) fast dye llifyn anniflan fast dyes llifyn anniflan fast food bwyd cyflym fast foods bwyd cyflym fast reaction adwaith cyflym fast reactions adwaith cyflym fast starter cychwynnwr cyflym fast starters cychwynnwr cyflym fasten bachu (with hook) fasten clymu (with rope) fasten hoelio (with nails) fastener ffasnydd fasteners ffasnydd fastening device dyfais sicrhau fastening devices dyfais sicrhau fastening screw sgriw sicrhau fastening screws sgriw sicrhau fastenings dull cau fastness anniflanedd (of colour) fasts ympryd fat braster fat depot storfa fraster fat depots storfa fraster fat globule globwl braster fat globules globwl braster fat pigment pigment bras fat pigments pigment bras fat soluble vitamin fitamin braster-hydawdd fat soluble vitamins fitamin braster-hydawdd fatal dose dos angheuol fatal doses dos angheuol fatal error gwall angheuol fatal errors gwall angheuol father tape mam-dâp father tapes mam-dâp fathom gwryd fathoms gwryd fatigue lludded (of muscle, metal) fatigues lludded (of muscle, metal) fatty brasterog fatty acid asid brasterog fatty acids asid brasterog fatty marrow mêr brasterog fatty marrows mêr brasterog fatty meat cig gwyn fatty meats cig gwyn fault bai (=blame) fault diffyg (=defect) fault ffawt (in geology and tennis) fault ffawtio (in geology and tennis) fault line ffawtlin fault lines ffawtlin fault processing system system prosesu diffygion fault processing systems system prosesu diffygion fault rate cyfradd diffygion fault rates cyfradd diffygion fault status statws diffyg fault zone cylchfa ffawtio fault zones cylchfa ffawtio faulted strata haenau ffawtiedig faults bai (=blame) faults diffyg (=defect) faults ffawt (in geology and tennis) faulty diffygiol faulty bully bwli cam faulty goods nwyddau diffygiol fauna ffawna faux bourdon faux bourdon faux bourdons faux bourdon favour ffafrio favourite ffefryn favourites ffefryn fax ffacs fax ffacsio fax gateway porth ffacs fax header template patrymlun pennawd ffacs fax header templates patrymlun pennawd ffacs fax template templed ffacs fax templates templed ffacs fealty llw ffyddlondeb fealty homage gwrogaeth llw ffyddlondeb fealty homages gwrogaeth llw ffyddlondeb feasibility study astudiaeth dichonoldeb feasible dichonadwy feasible region rhanbarth dichonadwy feasible regions rhanbarth dichonadwy feasible solution datrysiad dichonadwy feasible solutions datrysiad dichonadwy feast gŵyl feast day dydd gŵyl feasts gŵyl feather pluen feather pluo feather key allwedd bluen feather smocking smocwaith pluen feather smockings smocwaith pluen feather stitch pwyth pluen feather stitches pwyth pluen feather weight pwysau plu feathering pluo (pottery decoration) feathers pluen feature arwedd (on surface) feature erthygl nodwedd (=feature article) feature nodwedd (in general) feature film prif ffilm feature films prif ffilm feature length film prif ffilm feature length films prif ffilm feature variants amrywiolion nodwedd features arwedd (on surface) features erthygl nodwedd (=feature article) features nodwedd (in general) features wynepryd (of face) febrile twymynol fecundity ffrwythlonedd federal ffederal federal republic gweriniaeth ffederal federal republics gweriniaeth ffederal federalism ffederaliaeth federalisms ffederaliaeth federate ffederaleiddio federation ffederasiwn federations ffederasiwn fee ffi feed bwydo (in general) feed porthi (livestock) feed porthiant feed dog dannedd (on machine) feed hole twll porthi feed holes twll porthi feed shaft siafft borthi feed shafts siafft borthi feedback adborth feedback adborthi feedback control loop dolen adborth a rheoli feedback control loops dolen adborth a rheoli feedback loop dolen adborth feedback loops dolen adborth feedback sheet dalen adborth feedback sheets dalen adborth feedbacks adborth feeder cyflenwydd (of stream, road etc) feeder ymborthwr (of animal) feeders cyflenwydd (of stream, road etc) feeders ymborthwr (of animal) feeding habits arferion bwyta feeding relationship perthynas bwydo feeding relationships perthynas bwydo feeding-bottle potel fwydo feeding-bottles potel fwydo feeding-time amser bwydo feeding-times amser bwydo feeds porthiant feel naws (=atmosphere) feel teimlad (=touch) feel teimlo feeler gauge medrydd teimlo feeler gauges medrydd teimlo feeling teimlad feelings teimlad feels naws (=atmosphere) feels teimlad (=touch) feigned relic crair ffug feigned relics crair ffug feint ffugio feint of disengagement datgyweddiad ffug feldspar ffelsbar feldspars ffelsbar feldspathic ffelspathig felling cwympo coed (timber) felloe camog felloes camog fellow cymrawd (in university) fellows cymrawd (in university) fellowship cymrodoriaeth (in university) fellowships cymrodoriaeth (in university) felon ffelon felonious ffelonaidd felons ffelon felony ffeloniaeth felsenmeer ffelsenmer felsenmeers ffelsenmer felt ffelt felt buff bwff ffelt felt buffs bwff ffelt felt marker marciwr ffelt felt markers marciwr ffelt felt mop mop ffelt felt mops mop ffelt felt nail hoelen benfawr felt nails hoelen benfawr felt pad pad ffelt felt pads pad ffelt felt pen pen ffelt felt pen drawing llun pen ffelt felt pen drawings llun pen ffelt felt pens pen ffelt felt ring cylch ffelt felt rings cylch ffelt felt work gwaith ffelt felt works gwaith ffelt felt-tip pen pen blaen ffelt felt-tip pens pen blaen ffelt felted carpet carped ffeltiog felted carpets carped ffeltiog felting ffeltin feltings ffeltin felts ffelt female benyw female benywol female gamete gamet benyw female gametes gamet benyw female screw sgriw fenyw female screws sgriw fenyw female thread edau fenyw female threads edau fenyw females benyw feminine benywaidd feminism ffeministiaeth feminisms ffeministiaeth feminist ffeminist feminist ffeministaidd feminist model model ffeministaidd feminist models model ffeministaidd feminist theology diwinyddiaeth ffeministaidd feminists ffeminist femoral morddwydol femur asgwrn y forddwyd femurs asgwrn y forddwyd fen ffen fence ffens fence ffensio fence saw llif ffens fence saws llif ffens fencer ffensiwr fencers ffensiwr fences ffens fenestra ovalis ffenestr hirgron fenlands ffendiroedd fennel ffenigl fennels ffenigl fenstra rotunda ffenestr gron fenstra rotundas ffenestr gron feodary ffeodariad feoffee ffeodai feoffees ffeodai feoffees for impropriation ffeodeion amfeddiad feoffment ffeodiad feoffments ffeodiad feoffor ffeodwr feoffors ffeodwr fermata daliant fermatas daliant ferment eples ferment nodchwilio fermentation eplesiad fermentation science epleseg fermentation sciences epleseg fermentations eplesiad fermentative eplesol fermenter eplesydd fermenters eplesydd ferments eples fermium ffermiwm (Fm) fermiums ffermiwm (Fm) fern rhedynen ferns rhedynen ferric fferrig ferric chloride fferrig clorid ferric chlorides fferrig clorid ferrite fferrit ferrite core craidd fferrit ferrite cores craidd fferrit ferrites fferrit ferro-concrete fferoconcrit ferro-concretes fferoconcrit ferromagnetism fferomagnetedd ferromagnetisms fferomagnetedd ferrous fferrus ferrous core craidd fferrus ferrous cores craidd fferrus ferrous metal metel fferrus ferrous metals metel fferrus ferrule amgarn ferrule slot slot amgarn ferrule slots slot amgarn ferrules amgarn ferry fferi ferry glide llithriad fferi ferry glides llithriad fferi fertile ffrwythlon fertilised ffrwythlonedig fertility ffrwythlondeb fertility rate cyfradd ffrwythlondeb fertility rates cyfradd ffrwythlondeb fertilization ffrwythloniad fertilizations ffrwythloniad fertilize ffrwythloni (in biology) fertilize gwrteithio (in agriculture) fertilizer gwrtaith fertilizers gwrtaith fescue peiswellt fescues peiswellt festival gŵyl festival theatre theatr gŵyl festival theatres theatr gŵyl festivals gŵyl fetch cyrch fetch cyrchu fetch cywain (computer command) fetch / execute cycle cylchred cywain / gweithredu fetch / execute cycles cylchred cywain / gweithredu fetches cyrch fetish ffetish fetishs ffetish fettle ffetlo feud cynnen feudal ffiwdal feudal aid cymhorthdreth ffiwdal feudal aids cymhorthdreth ffiwdal feudal court llys ffiwdal feudal courts llys ffiwdal feudal incident hawl ffiwdal feudal incidents hawl ffiwdal feudal overlord uwcharglwydd ffiwdal feudal overlords uwcharglwydd ffiwdal feudal overlordship uwcharglwyddiaeth ffiwdal feudal overlordships uwcharglwyddiaeth ffiwdal feudal system trefn ffiwdal feudal systems trefn ffiwdal feudalism ffiwdaliaeth feudalisms ffiwdaliaeth feudalize ffiwdaleiddio feuds cynnen fever twymyn fevers twymyn fibre ffibr fibre content cynnwys ffibr fibre contents cynnwys ffibr fibre mat mat ffibr fibre mats mat ffibr fibre optics opteg ffibr fibre pen pen ffibr fibre pens pen ffibr fibre plug plwg ffibr fibre plugs plwg ffibr fibre track trac ffibr fibre tracks trac ffibr fibre washer wasier ffibr fibre washers wasier ffibr fibre-tip pen pen blaen ffibr fibre-tip pens pen blaen ffibr fibreboard bwrdd ffibr fibreboards bwrdd ffibr fibreglass gwydr ffibr fibreglass bar bar o wydr ffibr fibreglass bars bar o wydr ffibr fibreglass racket raced ffibr gwydr fibreglass rackets raced ffibr gwydr fibres ffibr fibril ffibrolyn fibrillation ffibriliad fibrillations ffibriliad fibrils ffibrolyn fibrin ffibrin fibrinogen ffibrinogen fibrinogens ffibrinogen fibrins ffibrin fibroblast ffibroblast fibroblasts ffibroblast fibrocyte ffibrocyt fibrocytes ffibrocyt fibrous ffibrog fibrous coat cot ffibrog fibrous coats cot ffibrog fibrous peat mawn ffibrog fibrous peats mawn ffibrog fibrous root gwreiddyn ffibrog fibrous roots gwreiddyn ffibrog fibula ffibwla fibulas ffibwla fictitious dychmygol fictitious statute statud ffug fictitious statutes statud ffug fiddle ffidil fiddle back cefn crwth fiddle back chair cadair gefn crwth fiddle back chairs cadair gefn crwth fiddler ffidlwr fiddlers ffidlwr fiddles ffidil fief ffiff fiefs ffiff field cae (in agriculture) field maes (of study etc) field maesu field centre canolfan maes field centres canolfan maes field coil coil maes field coils coil maes field data data maes field dependence dibyniaeth maes field dependences dibyniaeth maes field event cystadleuaeth faes field events cystadleuaeth faes field ion microscope microsgop maes ïonau field ion microscopes microsgop maes ïonau field length hyd maes field lengths hyd maes field line llinell faes field lines llinell faes field mapping mapio maes field marshal maeslywydd field marshals maeslywydd field notes nodiadau maes field of force maes grym field of view maes gweld field on the boundary maesu ar y ffin field sketch braslun maes field sketches braslun maes field strength cryfder maes field strengths cryfder maes field test prawf maes field tests prawf maes field worker gweithiwr maes field workers gweithiwr maes field-upgradeable maes-uwchriaddadwy fielder maeswr fielders maeswr fields cae (in agriculture) fields maes (of study etc) fields of pasture tir pori fieldwork gwaith maes fieldwork investigation ymchwiliad gwaith maes fieldwork investigations ymchwiliad gwaith maes fieldwork report adroddiad gwaith maes fieldwork reports adroddiad gwaith maes fieldworks gwaith maes fifth pumed (musical interval) fifth column pumed golofn fifth columns pumed golofn fifths pumed (musical interval) fig ffigysen fight or flight ymladd neu ffoi fighting arm braich ymladd fighting arms braich ymladd figment of imagination creadigaeth y dychymyg figurative ffigurol figurative painting paentiad ffigurol (of painted picture) figurative painting peintio ffigurol (of process or art) figurative paintings paentiad ffigurol (of painted picture) figure ffigur figure eight ffigur wyth figure eights ffigur wyth figured rhifoledig figured bass bas rhifoledig figures ffigur figurine ffiguryn figurines ffiguryn figuring rhifoli figuring of chords rhifoli cordiau filament ffilament filament yarn edau ffilament filament yarns edau ffilament filamentous ffilamentog filaments ffilament filbert shape brush brwsh siâp cneuen filbert shape brushs brwsh siâp cneuen file ffeilio file access cyrchu o ffeil file backup ffeil wrth gefn file backups ffeil wrth gefn file creation creu ffeil file extent maint ffeil file extents maint ffeil file handling trin ffeiliau file librarian llyfrgellydd ffeiliau file librarians llyfrgellydd ffeiliau file maintenance cynnal ffeiliau file name enw ffeil file names enw ffeil file organization trefnu ffeiliau file parts rhannau ffeil file pricker priciwr ffeil file prickers priciwr ffeil file processing prosesu ffeil file protection diogelu ffeil file protection code cod diogelu ffeil file protection codes cod diogelu ffeil file recovery adfer ffeil file store storfa ffeiliau file stores storfa ffeiliau file structure strwythur ffeiliau file structures strwythur ffeiliau filial mabol filiform edeuffurf filigree ffiligri filigrees ffiligri filing menu dewislen ffeilio filing menus dewislen ffeilio filings naddion fill llenwad (e.g. in volcano vent) fill llenwi filled llanw (3rds, 4ths, etc) filled tooth dant â llenwad filled tooths dant â llenwad filler llenwad fillers llenwad fillet ffiled fillet ffiledu fillet gauge medrydd ffiled fillet gauges medrydd ffiled fillet moulding mowldin ffiled fillet mouldings mowldin ffiled fillet weld lleinweldiad fillet welds lleinweldiad fillets ffiled filling llenwad filling rod rhoden lenwi filling rods rhoden lenwi filling station gorsaf betrol filling stations gorsaf betrol filling stitch pwyth llenwi filling stitches pwyth llenwi fillings llenwad fillister plane plaen ffilistr fillister planes plaen ffilistr fills llenwad (e.g. in volcano vent) film ffilm film consumption gwylio ffilmiau film culture diwylliant ffilmiau film cultures diwylliant ffilmiau film form ffurf ffilm film former ffurfiwr ffilm film formers ffurfiwr ffilm film forms ffurf ffilm film journalism newyddiaduraeth ffilm film journalisms newyddiaduraeth ffilm film language iaith ffilm film languages iaith ffilm film library llyfrgell ffilmiau film movement mudiad ffilmiau film movements mudiad ffilmiau film strip stribed ffilm film strips stribed ffilm film synopsis crynodeb o ffilm film trailer rhaglun ffilm film trailers rhaglun ffilm films ffilm filter hidlen (of solid particles) filter hidlo filter hidlydd (of light, sound) filter accumulation cronedd hidlo filter accumulations cronedd hidlo filter bed haen hidlo filter beds haen hidlo filter funnel twndis hidlo filter funnels twndis hidlo filter paper papur hidlo filter papers papur hidlo filter pump pwmp hidlo filter pumps pwmp hidlo filterable virus firws hidladwy filtered coffee coffi wedi'i hidlo filtered coffees coffi wedi'i hidlo filters hidlen (of solid particles) filters hidlydd (of light, sound) filtrate hidlif filtrates hidlif filtration hidliad filtrations hidliad fin asgell final terfynol final cause achos terfynol final causes achos terfynol final concord cytundeb terfynol final concords cytundeb terfynol final domestic demand galw mewnol terfynol final domestic demands galw mewnol terfynol final drive gyriad terfynol final drives gyriad terfynol final outcome gwrthrych terfynol final outcomes gwrthrych terfynol final report adroddiad terfynol final reports adroddiad terfynol final treatment triniaeth derfynol final treatments triniaeth derfynol final velocity cyflymder terfynol finale finale finales finale finals arholiadau terfynol finance ariannu finance cyllid finance the activities ariannu'r gweithgareddau finances cyllid financial ariannol financial aims and objectives nodau ac amcanion ariannol financial boom ffyniant ariannol financial booms ffyniant ariannol financial document dogfen ariannol financial documents dogfen ariannol financial information gwybodaeth ariannol financial informations gwybodaeth ariannol financial performance perfformiad ariannol financial performances perfformiad ariannol financial ratio cymhareb ariannol financial regulations rheoliadau ariannol financial service gwasanaeth ariannol financial services gwasanaeth ariannol financial transaction trafod ariannol financial transactions trafod ariannol financial year blwyddyn ariannol financial year basis sail blwyddyn ariannol financial years blwyddyn ariannol financier ariannwr financiers ariannwr finch pinc finch population poblogaeth y pincod finch populations poblogaeth y pincod finches pinc find darganfod (in general) find darganfyddiad find solutions darganfod atebion findings casgliadau (in report etc) finds darganfyddiad fine dirwy (=penalty) fine dirwyo fine main (of cloth) fine manwl (=worked in slender thread) fine mân (of small particles, print) fine tâl (=payment) fine adjustment cymhwysiad manwl fine adjustments cymhwysiad manwl fine art celfyddyd gain fine arts celfyddyd gain fine beam paladr main fine beams paladr main fine brass wire gwifren bres fain fine brass wires gwifren bres fain fine control rheolaeth fanwl fine control rheolydd manwl (dial switch) fine controls rheolaeth fanwl fine controls rheolydd manwl (dial switch) fine dust llwch mân fine dusts llwch mân fine grain graen mân fine grains graen mân fine grit grit mân fine grits grit mân fine knurl nwrl mân fine knurls nwrl mân fine leg coeswr cul fine legs coeswr cul fine manipulative skills sgiliau llawdrin manwl fine mesh rhwyll fain fine meshs rhwyll fain fine motor skills sgiliau echddygol manwl fine orifice agorfa fach fine orifices agorfa fach fine point pwynt main fine points pwynt main fine structure mân-adeiledd fine structures mân-adeiledd fine surface arwyneb llyfn fine surfaces arwyneb llyfn fine teeth dannedd mân fine texture gwead main fine textures gwead main fineness manedd (of sand, fragments) fineness meinder (of fabric) fines dirwy (=penalty) fines tâl (=payment) fines herbes sawrlysiau cymysg finger bys finger byseddu finger cymbals symbalau bys finger gauge medrydd bys finger gauges medrydd bys finger holds gafaelion bysedd finger hole twll bys finger holes twll bys finger joint uniad bys (box) finger joints uniad bys (box) finger lake llyn hirgul finger lakes llyn hirgul finger paint paent bys finger painting paentiad bys (of painted picture) finger painting peintio bys (of process or art) finger paintings paentiad bys (of painted picture) finger paints paent bys finger plate plât bys finger plates plât bys finger puppet pyped bys finger puppets pyped bys fingered bysedig fingering byseddu fingerprint ôl bys fingerprints ôl bys fingers bys finish gorffen finish gorffeniad finished gorffenedig finished appearance gwedd orffenedig finished appearances gwedd orffenedig finished dimensions dimensiynau gorffenedig finished drawing lluniad gorffenedig finished drawings lluniad gorffenedig finished goods nwyddau gorffenedig finished product cynnyrch gorffenedig finished products cynnyrch gorffenedig finished size maint gorffenedig finished sizes maint gorffenedig finished surface arwyneb gorffenedig finished surfaces arwyneb gorffenedig finishing gorffennu finishing cuts toriadau gorffennu finishing press gwasg orffennu finishing process proses orffennu finishing stove stof orffennu finishing stoves stof orffennu finishing technique techneg orffennu finishing techniques techneg orffennu finishing tools offer gorffennu finishs gorffeniad finite meidraidd finite canon canon gyfanedig finite canons canon gyfanedig finitely generated generadol feidraidd fiord ffiord fiords ffiord fire ffwrndanio (enamel) fire tanio fire tân fire blanket blanced dân fire blankets blanced dân fire bote hawl cynuta fire botes hawl cynuta fire damp nwy pwll glo fire damps nwy pwll glo fire extinguisher diffoddwr tân fire extinguishers diffoddwr tân fire protection diogelwch rhag tân fire protections diogelwch rhag tân fire weld tân weldio firebrick bricsen dân firebricks bricsen dân fireclay clai tân firedamp explosion tanchwa firedamp explosions tanchwa fireguard gard tân fireguards gard tân fireplace lle tân fireplaces lle tân fireproof gwrthdan fireproof material defnydd gwrthdan fireproof materials defnydd gwrthdan fires tân fireside chat sgwrs aelwyd fireside chats sgwrs aelwyd firing tanio (kiln) firing chamber siambr danio firing chambers siambr danio firing fork fforch danio firing forks fforch danio firm cadarn firm cwmni firm joint calliper caliper cymal cadarn firm joint callipers caliper cymal cadarn firm wrist arddwrn cadarn firm wrists arddwrn cadarn firmer chisel cŷn ffyrf firmer chisels cŷn ffyrf firmer gouge gaing gau gefn firmer gouges gaing gau gefn firming piece darn lletemu firming pieces darn lletemu firms cwmni firmware cadarnwedd firn ffirn firns ffirn first aid cymorth cyntaf first aids cymorth cyntaf first angle projection tafluniad ongl gyntaf first angle projections tafluniad ongl gyntaf first cause achos cyntaf first causes achos cyntaf first degree equation hafaliad unradd first degree equations hafaliad unradd first floor llawr cyntaf first floors llawr cyntaf first fold plyg cyntaf first folds plyg cyntaf first fruits blaenffrwyth first generation cenhedlaeth gyntaf first generations cenhedlaeth gyntaf first in - first out cyntaf i mewn - cyntaf allan (FIFO) first inversion gwrthdro cyntaf first inversions gwrthdro cyntaf first language pupil disgybl iaith gyntaf first language pupils disgybl iaith gyntaf first law of thermodynamics deddf gyntaf thermodynameg first movement form ffurf symudiad cyntaf (in music) first movement forms ffurf symudiad cyntaf (in music) first order trefn un first order differential equation hafaliad differol trefn un first order differential equations hafaliad differol trefn un first order reaction adwaith gradd un first order reactions adwaith gradd un first order stream ffrwd gradd un first order streams ffrwd gradd un first orders trefn un first point pwynt cyntaf first points pwynt cyntaf first reported assessment asesiad cyntaf sy'n destun adroddiad first reported assessments asesiad cyntaf sy'n destun adroddiad first serve serf gyntaf first serves serf gyntaf first sharp remove gwyriad y llonnod cyntaf first sharp removes gwyriad y llonnod cyntaf first slip slip cyntaf first slips slip cyntaf first unreported assessment asesiad cyntaf nad yw'n destun adroddiad first unreported assessments asesiad cyntaf nad yw'n destun adroddiad fiscal cyllidol fiscal drag llusgiad cyllidol fiscal drags llusgiad cyllidol fiscal policy polisi cyllidol fish pysgodyn fish bowl exercise ymarfer powlen bysgod fish bowl exercises ymarfer powlen bysgod fish eating bird aderyn pysgysol fish eating birds aderyn pysgysol fish finger bys pysgodyn fish fingers bys pysgodyn fish liver oil olew iau pysgod fish liver oils olew iau pysgod fish meal blawd pysgod fish meals blawd pysgod fish slice sleis bysgod fish slices sleis bysgod fish-tail scroll sgrôl cynffon pysgodyn fish-tail scrolls sgrôl cynffon pysgodyn fishbone stitch pwyth asgwrn pysgodyn fishbone stitches pwyth asgwrn pysgodyn fishcake cacen bysgod fishcakes cacen bysgod fisherman pysgotwr fisherman's joining knot cwlwm pysgotwr fisherman's joining knots cwlwm pysgotwr fishermans pysgotwr fishing pysgota fishing ground pysgodfa fishing grounds pysgodfa fishing village pentref pysgota fishing villages pentref pysgota fishmonger gwerthwr pysgod fishmongers gwerthwr pysgod fishs pysgodyn fissile ymholltog fission ymholltiad fission product cynnyrch ymhollti fission products cynnyrch ymhollti fission reaction adwaith ymholltiad fission reactions adwaith ymholltiad fissions ymholltiad fissure agen fissures agen fist dwrn fists dwrn fit ffit fit ffitio fit-up stage llwyfan cludadwy fit-up stages llwyfan cludadwy fitch hog brush brwsh blew ffwlbart fitch hog brushs brwsh blew ffwlbart fitment dodrefnyn sefydlog fitments dodrefnyn sefydlog fitness ffitrwydd (physical) fitness component elfen ffitrwydd fitness components elfen ffitrwydd fitness test prawf ffitrwydd fitness tests prawf ffitrwydd fits and limits ffitiau a therfynau fitted sheet cynfas ffitiedig fitted sheets cynfas ffitiedig fitted sleeve llawes hirgul fitted sleeves llawes hirgul fitter ffitiwr fitters ffitiwr fitting device dyfais ffitio fitting devices dyfais ffitio fitting line llinell ffitio fitting lines llinell ffitio fitting point pwynt ffitio fitting points pwynt ffitio fittings mân daclau five pump five -minute gun ergyd pum munud five -minute guns ergyd pum munud five bearded rockling brithyll Mair pumbarf five bearded rocklings brithyll Mair pumbarf five ply plywood pren haenog pum haen five ply plywoods pren haenog pum haen five steps pum cam five yard line llinell bumllath five yard lines llinell bumllath five year plan cynllun pum mlynedd five year plans cynllun pum mlynedd five-ply wood pren pum haen five-ply woods pren pum haen fives pump fix gosod (=install) fix pennu (in economics) fix sefydlogi (in photography and biology) fixation sefydlogiad (of biological process) fixations sefydlogiad (of biological process) fixative sefydlyn fixative spray chwistrell sefydlogi fixatives sefydlyn fixator sefydlogydd fixators sefydlogydd fixed gosodedig (=given) fixed penodol (=specified) fixed sefydlog (=unchangeable) fixed asset ased sefydlog fixed assets ased sefydlog fixed capital cyfalaf sefydlog fixed capitals cyfalaf sefydlog fixed composition cyfansoddiad sefydlog fixed compositions cyfansoddiad sefydlog fixed cost cost sefydlog fixed costs cost sefydlog fixed costs figure ffigwr costau sefydlog fixed costs figures ffigwr costau sefydlog fixed dune twyn sefydlog fixed dunes twyn sefydlog fixed exchange rate cyfradd gyfnewid osodedig fixed exchange rates cyfradd gyfnewid osodedig fixed field maes sefydlog fixed fields maes sefydlog fixed fret cribell osod fixed frets cribell osod fixed grill gridyll sefydlog fixed grills gridyll sefydlog fixed guide tywysydd sefydlog fixed guides tywysydd sefydlog fixed interest llog penodol fixed interests llog penodol fixed jaw safn sefydlog fixed jaws safn sefydlog fixed knife cyllell sefydlog (veneer cutting) fixed knifes cyllell sefydlog (veneer cutting) fixed length hyd penodol fixed length record cofnod hyd penodol fixed length records cofnod hyd penodol fixed lengths hyd penodol fixed mass màs penodol fixed mass of gas màs penodol o nwy fixed pin roloc sefydlog fixed pins roloc sefydlog fixed point pwynt sefydlog fixed point arithmetic rhifyddeg pwynt sefydlog fixed point arithmetics rhifyddeg pwynt sefydlog fixed points pwynt sefydlog fixed position safle sefydlog fixed positions safle sefydlog fixed powder colour powdrliw sefydlog fixed powder colours powdrliw sefydlog fixed price pris penodol fixed prices pris penodol fixed seat sedd sefydlog fixed seats sedd sefydlog fixed shelf silff sefydlog fixed shelfs silff sefydlog fixed size reamer agorell maint sefydlog fixed size reamers agorell maint sefydlog fixed steady sadydd disymud fixed table bwrdd sefydlog fixed tables bwrdd sefydlog fixed tub twb sefydlog fixed tubs twb sefydlog fixed word length hyd gair penodol fixed word lengths hyd gair penodol fixer sefydlyn fixers sefydlyn fixing pin pìn sefydlu fixing pins pìn sefydlu fixity of tenure sicrwydd daliadaeth fixture gosodyn fixtures gosodyn fjard ffiard fjards ffiard flaccid llipa flag baner (in general) flag lluman (in sport) flag llumanu flagellum fflagelwm flagellums fflagelwm flageolet beans ffa flageolet flags baner (in general) flags lluman (in sport) flagship llong y llyngesydd flagships llong y llyngesydd flagstone carreg lorio flagstones carreg lorio flake fflaw flake culture diwylliant fflawiau flake cultures diwylliant fflawiau flake test prawf haenu (jam) flake tests prawf haenu (jam) flake white gwyn plwm flake whites gwyn plwm flaked fflawiog flakes fflaw flaky pastry crwst haenog flambé flambé flame fflam flame cell cell fflam flame cells cell fflam flame cutter fflamdorrwr flame cutters fflamdorrwr flame probe chwiliedydd fflam flame probes chwiliedydd fflam flame proof gwrth-fflam flame test prawf fflam flame tests prawf fflam flame-failure device dyfais ailgynnau fflam flame-failure devices dyfais ailgynnau fflam flames fflam flammability fflamadwyedd flammable fflamadwy flan fflan flan ring cylch fflan flan rings cylch fflan flange fflans flange fflansio flange disc disg fflans flange discs disg fflans flanged rail rheilen fflans flanged rails rheilen fflans flanged seam sêm fflans flanged seams sêm fflans flanged spigot sbigot fflans flanged spigots sbigot fflans flanges fflans flank ystlys flanking transmission trawsyriant ochrol flanking transmissions trawsyriant ochrol flanks ystlys flannel gwlanen flannel patch clwt gwlanen flannel patches clwt gwlanen flannel seam sêm wlanen flannel seams sêm wlanen flannelette fflaneléd flannelettes fflaneléd flannels gwlanen flans fflan flap fflap flap pocket poced fflap flap pockets poced fflap flapjacks fflapjacs flapping chwifio flaps fflap flare fflerio flare fflêr flared skirt sgert fflêr flared skirts sgert fflêr flares fflêr flash fflach flash card cerdyn fflachio flash cards cerdyn fflachio flash converter trawsnewidydd fflach flash converters trawsnewidydd fflach flash flood fflachlif flash floods fflachlif flash point fflachbwynt flash points fflachbwynt flashback ôl-fflach flashbacks ôl-fflach flashed fflachedig flashing plygiad plwm (over door, window) flashings plygiad plwm (over door, window) flashover fflachiad flashovers fflachiad flashs fflach flask fflasg flasks fflasg flat fflat (=of little depth) flat fflat (=set of rooms, geographical feature) flat gwastad (=level, smooth) flat bit ebill gwastad flat bits ebill gwastad flat drawer slip drôr-gryfhawr fflat flat drawer slips drôr-gryfhawr fflat flat key lleddf gywair (in old Welsh music) flat locking plate plât cloi fflat flat locking plates plât cloi fflat flat metal axe bwyell fetel fflat flat metal axes bwyell fetel fflat flat organisational structure strwythur trefniadaeth gwastad flat organisational structures strwythur trefniadaeth gwastad flat-rate increase cynnydd unradd flat-rate increases cynnydd unradd flatfish lleden flatfishs lleden flatiron haearn smwddio flatirons haearn smwddio flatness gwastadrwydd flatpack furniture dodrefn fflatpac flatplan cynllun fflat flatplans cynllun fflat flats fflat (=set of rooms, geographical feature) flatten gostwng traw (musical pitch) flattened gwastad flatter fflatiwr flatters fflatiwr flatting fflatio (of forging process) flatulence gwynt flatulences gwynt flatus fflatws flautist ffliwtydd flautists ffliwtydd flavonoid fflafonoid flavonoids fflafonoid flavour blas flavouring cyflasyn flavourings cyflasyn flavours blas flaw diffyg flaws diffyg flax llin flax cord cortyn llin (sash window) flax cords cortyn llin (sash window) flax fibre ffibr llin flax fibres ffibr llin flaxes llin flea chwannen fleas chwannen fleck brychni fleck brychu flecks brychni flecnode fflecnod flecnodes fflecnod fleece cnu fleeces cnu fleecy cnufiog fleshy cnodiog flexibility hyblygrwydd flexibility regime rhaglen hyblygrwydd flexibility regimes rhaglen hyblygrwydd flexible hyblyg (=able to bend without breaking) flexible ystwyth (=supple) flexible cold glue glud oer ystwyth flexible cold glues glud oer ystwyth flexible coupling cyplydd hyblyg flexible couplings cyplydd hyblyg flexible hours scheme cynllun oriau hyblyg flexible hours schemes cynllun oriau hyblyg flexible joint cymal hyblyg flexible joints cymal hyblyg flexible workforce gweithlu hyblyg flexible workforces gweithlu hyblyg flexure plygiant flexure strength nerth plygiant flexure strengths nerth plygiant flexures plygiant flick fflic flick fflicio flick-flack fflic-fflac flick-flacks fflic-fflac flicks fflic flight feather pluen hedfan flight feathers pluen hedfan flip chart siart troi flip charts siart troi float arnofio float fflôt (=swimming aid) floating exchange rate cyfradd cyfnewid arnawf floating exchange rates cyfradd cyfnewid arnawf floating leaf deilen arnawf floating leafs deilen arnawf floating point pwynt arnawf floating point arithmetic rhifyddeg pwynt arnawf floating point arithmetics rhifyddeg pwynt arnawf floating point overflow gorlif pwynt arnawf floating point overflows gorlif pwynt arnawf floating points pwynt arnawf floats fflôt (=swimming aid) flock praidd flock print print ffloc flock prints print ffloc flocked carpet carped ffloc flocked carpets carped ffloc flocks praidd flood llifogydd flood hydrograph hydrograff llifogydd flood hydrographs hydrograff llifogydd flood plain gorlifdir flood plains gorlifdir floor joist trawst llawr floor joists trawst llawr floor level lefel llawr floor levels lefel llawr floor turtle crwban llawr floor turtles crwban llawr floorboard astell floorboards astell flooring saw llif lorio flooring saws llif lorio floorwork gwaith ar y llawr floorworks gwaith ar y llawr floppy disk disg hyblyg floppy disks disg hyblyg flora fflora floral blodeuog (in general) floral fflurol (in biology) floral diagram diagram fflurol floral diagrams diagram fflurol floral formula fformiwla fflurol floral formulas fformiwla fflurol floret blodigyn florets blodigyn florid blodeuog florigen fflorigen florigens fflorigen florist's wire gwifren gwerthwr blodau florist's wires gwifren gwerthwr blodau flotation arnofiad flotations arnofiad flotilla llynges fach flotillas llynges fach flounce fflowns flounces fflowns flounder lleden flounders lleden flour blawd flour improvers cemegion aeddfedu blawd flour paper papur blawd flour papers papur blawd flour paste past blawd flour pastes past blawd flourish blodeuo (of person) flourish ffanffer (=fanfare) flourish rhan flodeuog (=decorative passage) flourishs ffanffer (=fanfare) flourishs rhan flodeuog (=decorative passage) flours blawd floury blodiog flow llif flow llifo flow diagram diagram llif flow diagrams diagram llif flow function llif-ffwythiant flow functions llif-ffwythiant flow indicator dangosydd llif flow indicators dangosydd llif flow of charge llif gwefr flow pattern patrwm llif (of waves) flow patterns patrwm llif (of waves) flow production llif-gynhyrchu flow rate cyfradd llifiant flow rates cyfradd llifiant flow sheet llifddalen flow sheets llifddalen flowchart siart llif flowcharts siart llif flower blodyn flower head fflurben flower heads fflurben flower-inducing period cyfnod peri-blodeuo flower-inducing periods cyfnod peri-blodeuo flowering plant planhigyn blodeuol flowering plants planhigyn blodeuol flowers blodyn flowers of sulphur blawd sylffwr flowery blodeuog flowing garment dilledyn llac flowing garments dilledyn llac flowing water dŵr rhedegog flowing waters dŵr rhedegog flowline llinell rhediad flowlines llinell rhediad flows llif flowstone carreg ddylif flowstones carreg ddylif fluctuate anwadalu (in general) fluctuate tonni (of electric current) fluctuating anwadal fluctuating harmony harmoni anwadal fluctuation anwadaliad fluctuations anwadaliad fluctuative tonnog flue ffliw (in chimney, organ) fluency rhwyddineb (in calculation) flues ffliw (in chimney, organ) fluff fflwff fluff filter hidlen fflwff fluff filters hidlen fflwff fluffing fflwffio fluffs fflwff fluid hylif (=liquid) fluid hylifol (in general) fluid llifydd (of gas or liquid) fluid llifyddol (of gas or liquid) fluid llyfn (of style) fluid flow llif hylifau fluid flows llif hylifau fluid mosaic mosaig hylifol fluid mosaic model model mosaig hylifol fluid mosaic models model mosaig hylifol fluid mosaics mosaig hylifol fluidity llifedd (of gas or liquid) fluidization hylifo fluidized bed gwely llifol fluidized beds gwely llifol fluidizer hylifydd fluidizers hylifydd fluids hylif (=liquid) fluids llifydd (of gas or liquid) fluke llabed (of a whale) flukes llabed (of a whale) flume cafn (=channel) flume ceunant (=ravine) flumes cafn (=channel) flumes ceunant (=ravine) fluoresce fflwroleuo fluorescence fflwroleuedd fluorescences fflwroleuedd fluorescent fflwroleuol fluorescent colour lliw fflwroleuol fluorescent colours lliw fflwroleuol fluorescent dye llifyn fflwroleuol fluorescent dyes llifyn fflwroleuol fluorescent lighting fflwrolau fluorescent lightings fflwrolau fluorescent whitener gwynnydd fflwroleuol fluorescent whiteners gwynnydd fflwroleuol fluorescer fflworesydd fluorescers fflworesydd fluoridation fflworeiddiad fluoridations fflworeiddiad fluoride fflworid fluorides fflworid fluorimeter fflworimedr fluorimeters fflworimedr fluorine fflworin (F) fluorines fflworin (F) fluoroplastics fflworoblastigion fluorosis fflworosis flush cyfwyneb flush gwacáu flush gwrid (=blush) flush rhuthr dŵr (of water) flush bolt bollt gyfwyneb flush bolts bollt gyfwyneb flush door drws cyfwyneb flush doors drws cyfwyneb flush drawer slip drôr-gryfhawr cyfwyneb flush drawer slips drôr-gryfhawr cyfwyneb flush eave bondo cyfwyneb flush eaves bondo cyfwyneb flush joint uniad cyfwyneb flush joints uniad cyfwyneb flush moulding mowldin cyfwyneb flush mouldings mowldin cyfwyneb flush panel panel cyfwyneb flush panels panel cyfwyneb flush rails rheilen gyfwyneb flush surface arwyneb cyfwyneb flush surfaces arwyneb cyfwyneb flush-beaded panel panel gleinio cyfwyneb flush-beaded panels panel gleinio cyfwyneb flushs gwrid (=blush) flushs rhuthr dŵr (of water) flute ffliwt flute rhychu flute player ffliwtydd flute players ffliwtydd fluted rhychiog fluted cutter torrell rychiog fluted cutters torrell rychiog fluted edge ymyl rychiog fluted edges ymyl rychiog fluted flan ring cylch fflan rhychiog fluted flan rings cylch fflan rhychiog fluted hardboard caledfwrdd rhychiog fluted hardboards caledfwrdd rhychiog fluted lace les rhychiog fluted laces les rhychiog fluted reamer agorell rychiog fluted reamers agorell rychiog fluted screwdriver tyrnsgriw rychiog fluted screwdrivers tyrnsgriw rychiog flutes ffliwt fluting rhychwaith flutings rhychwaith flutter tonguing cryndafodi fluttering hwyfo fluvial afonol fluvioglacial material defnyddiau ffrwdrewlifol flux fflwcs flux density dwysedd fflwcs flux linkage cysylltedd fflwcs flux linkages cysylltedd fflwcs flux-turns interlinkage cydgysylltedd troadau fflwcs flux-turns interlinkages cydgysylltedd troadau fflwcs fluxes fflwcs fluxing agent cyfrwng fflycsio fluxing agents cyfrwng fflycsio fluxocarbon fflwcsocarbon fluxocarbons fflwcsocarbon fly cutter cŷn hedegog fly cutters cŷn hedegog fly kick cic wib fly kicks cic wib fly milling cutter melinwr hedegog fly on the wall documentary rhaglen ddogfen ‘pry ar y wal’ fly opening copis fly openings copis fly press gwasg hedegog fly spring naid ddeudroed fly springs naid ddeudroed fly stitch pwyth pryf fly stitches pwyth pryf fly weight pwysau pryf fly-leaf dalen frig fly-leafs dalen frig flying picket picedwr gwib flying pickets picedwr gwib flying shore ateg fwa flying shores ateg fwa flying shuttle gwennol hedegog flying shuttles gwennol hedegog flying tackle tacl wib flying tackles tacl wib flyover trosffordd flyovers trosffordd flyspring sbring deudroed flysprings sbring deudroed flywheel chwylrod flywheels chwylrod foam ewyn (=mass of bubbles) foam ewynnu foam sbwng (filling) foam rubber rwber sbwng foam rubbers rwber sbwng foam stabilizer sefydlogydd trochion foam stabilizers sefydlogydd trochion foambacked cefnsbwng foams ewyn (=mass of bubbles) foams sbwng (filling) focal ffocal focal length hyd ffocal focal lengths hyd ffocal focal point canolbwynt (of concentration etc) focal point pwynt ffocal (in optics etc) focal points canolbwynt (of concentration etc) focal points pwynt ffocal (in optics etc) focus canolbwynt (of concentration, earthquake etc) focus canolbwyntio (=concentrate) focus ffocws (in optics etc) focus ffocysu (in optics etc) focus area ardal ffocws focus areas ardal ffocws focus film ffilm ffocws focus films ffilm ffocws focus group grŵp ffocws focus groups grŵp ffocws focused canolbwyntiedig fodder porthiant fodder crop cnwd porthiant fodder crops cnwd porthiant fodders porthiant foetal alcohol syndrome syndrom alcohol y ffoetws foetal alcohol syndromes syndrom alcohol y ffoetws foetal membrane pilen y ffoetws foetal membranes pilen y ffoetws foetus ffoetws fog niwl fog niwlo foggara ffogara foggaras ffogara fogging niwl foggings niwl foil ffoil (=thin metal) foil ffwyl (in fencing) foilist ffwyliwr foilists ffwyliwr foils ffoil (=thin metal) foils ffwyl (in fencing) folar deiliog fold plyg fold plygu fold in cyfuno (in cooking) fold line llinell blygu fold lines llinell blygu fold-away grill gridyll plygu fold-away grills gridyll plygu fold-down screen sgrin blygu fold-down screens sgrin blygu folded plyg folded beds haenau plyg (strata) folded metal back saw llif gefn fetel plyg folded metal back saws llif gefn fetel plyg folded seam sêm blyg folded seams sêm blyg folded wall of the intestine mur plyg y coluddyn folder ffolder folders ffolder folding bars barrau plygu folding keel cilbren plygu folding keels cilbren plygu folding rule riwl blygu folding rules riwl blygu folding wedge lletem gyflin folding wedges lletem gyflin folding work gwaith plygu folding works gwaith plygu folds plyg foliage deiliant foliage sculpture cerflunwaith deiliant foliage sculptures cerflunwaith deiliant foliages deiliant foliated deiliog foliation deiliogrwydd foliations deiliogrwydd folio ffolio folium ffoliwm foliums ffoliwm folk dance dawns werin folk dance twmpath dawns (occasion) folk dance caller geilwad folk dance callers geilwad folk dances dawns werin folk dances twmpath dawns (occasion) folk dancing dawnsio gwerin folk dancing skills sgiliau dawnsio gwerin folk school ysgol werin folk schools ysgol werin folk song cân werin folk songs cân werin folklore llên gwerin folklores llên gwerin follicle ffoligl follicle-stimlating hormone hormon symbylu ffoliglau follicle-stimlating hormones hormon symbylu ffoliglau follicles ffoligl follicular ffoliglaidd follow dilyn follow on dilyn ymlaen follow through dilyn drwodd follow-up dilyniant follow-up dilynol follow-up visit ymweliad dilynol follow-up visits ymweliad dilynol follow-ups dilyniant follower dilynwr followers dilynwr following routes dilyn llwybrau fondant ffondant fondants ffondant font bedyddfaen (for baptism) font ffont (=set of type) fontanelle ffontanél fontanelles ffontanél fonts bedyddfaen (for baptism) fonts ffont (=set of type) food bwyd food additive ychwanegyn bwyd food additives ychwanegyn bwyd food chain cadwyn fwyd food chains cadwyn fwyd food components cydrannau bwyd food composition cyfansoddiad bwyd food compositions cyfansoddiad bwyd food content cynnwys bwyd food contents cynnwys bwyd food cycle cylchred fwyd food cycles cylchred fwyd food digestion treulio bwyd food group grŵp bwyd food groups grŵp bwyd food hygiene hylendid bwyd food hygienes hylendid bwyd food intolerance anoddefgarwch bwyd food intolerances anoddefgarwch bwyd food materials defnyddiau bwyd food mixer cymysgydd bwyd food mixers cymysgydd bwyd food outlet allfa fwyd food outlets allfa fwyd food poisoning gwenwyn bwyd food poisonings gwenwyn bwyd food preparation area lle paratoi bwyd food preparation areas lle paratoi bwyd food preservation cyffeithio bwyd food preservative cyffeithydd bwyd food preservatives cyffeithydd bwyd food processor prosesydd bwyd food processors prosesydd bwyd food product cynnyrch bwyd food product designer dylunydd cynhyrchion bwyd food product designers dylunydd cynhyrchion bwyd food products cynnyrch bwyd food pyramid pyramid bwydydd food pyramids pyramid bwydydd food rationing dogni bwyd food spoilage dirywiad bwyd food spoilages dirywiad bwyd food supplies cyflenwad bwyd food table tabl bwyd food tables tabl bwyd food vessel bwydlestr food vessels bwydlestr food web gwe fwydydd food webs gwe fwydydd food wrap defnydd lapio bwyd food wraps defnydd lapio bwyd food-related custom arfer bwyd food-related customs arfer bwyd foods bwyd foodstuff bwyd foodstuffs bwyd foolscap ffwlsgap foolscaps ffwlsgap foot troed (of body part) foot troedfedd (=measurement) foot and mouth crisis argyfwng clwy'r traed a'r genau foot bellows megin droed foot control rheolydd troed (of machine part) foot controls rheolydd troed (of machine part) foot fault ffawt troed foot faults ffawt troed foot glacier troed-rewlif foot glaciers troed-rewlif foot music cerddoriaeth traed foot musics cerddoriaeth traed foot of perpendicular troed y perpendicwlar foot run troedfedd o hyd (of timber) foot runs troedfedd o hyd (of timber) foot super troedfedd sgwâr o bren foot supers troedfedd sgwâr o bren foot-loose industry diwydiant rhyddsymudol foot-rush cwrs traed foot-rushs cwrs traed footage darn o ffilm footages darn o ffilm football pêl-droed football field maes pêl-droed football fields maes pêl-droed football pitch cae pêl-droed football pitches cae pêl-droed football stadium stadiwm pêl-droed football stadiums stadiwm pêl-droed footballer pêl-droediwr footballers pêl-droediwr footballs pêl-droed footbath baddon traed footbaths baddon traed footbridge pompren footbridges pompren footer troedyn footers troedyn foothills godrefryniau foothold gafael troed footholds gafael troed footlights golau'r godre footnote troednodyn footnotes troednodyn footpath llwybr troed footpaths llwybr troed footpower loom gwŷdd troedlath footpower looms gwŷdd troedlath footprint maint troed (in computing) footprint ôl troed (in general) footprints maint troed (in computing) footprints ôl troed (in general) foots troed (of body part) foots troedfedd (=measurement) footstool stôl droed footstools stôl droed footwear esgidiau footwork troedwaith footworks troedwaith forage porthiant forages porthiant foraging chwilota foramen fforamen foramens fforamen force byddin (=army) force gorfodaeth (=compulsion) force gorfodi force grym (in science) force constant cysonyn grym force constants cysonyn grym force exerted grym a roir force fit ffit orwasg force fits ffit orwasg force of gravity grym disgyrchiant force pump pwmp grym force pumps pwmp grym force ratio cymhareb grym force the follow on gorfodi'r dilyn ymlaen forced economy economi gorfodol forced labour llafur gorfodol forced labours llafur gorfodol forced loan benthyciad gorfodol forced loans benthyciad gorfodol forced oscillation osgiliad gorfod forced oscillations osgiliad gorfod forced vibration dirgryniad gorfod forced vibrations dirgryniad gorfod forcemeat stwffin forcemeats stwffin forcemeter mesurydd grym forcemeters mesurydd grym forceps gefel forces byddin (=army) forces gorfodaeth (=compulsion) forces grym (in science) ford rhyd fords rhyd fore blaen fore-brain blaen-ymennydd fore-brains blaen-ymennydd fore-edge painting peintio ymylodol fore-limb coes flaen fore-limbs coes flaen fore-rib asen flaen fore-ribs asen flaen forearm elin forearm deflection eliniad forearm deflections eliniad forearm shield elinwisg forearm shields elinwisg forearms elin forecast rhagolwg forecast rhagweld forecasts rhagolwg foreclose blaen-gau foredeep blaenddwfn foredeeps blaenddwfn foredune cyn-dwyn foredunes cyn-dwyn forefinger mynegfys forefingers mynegfys foreground blaendir foregrounds blaendir forehand blaenllaw forehand side ochr flaenllaw forehand sides ochr flaenllaw forehand stroke ergyd flaenllaw forehand strokes ergyd flaenllaw forehands blaenllaw foreign tramor (=overseas) foreign affair mater tramor foreign affairs mater tramor foreign body corffyn estron foreign exchange cyfnewidfa dramor foreign exchanges cyfnewidfa dramor foreign key allwedd estron foreign policy polisi tramor foreign trade masnach dramor foreign trades masnach dramor foreigner tramorwr foreigners tramorwr foreknowledge rhagwybodaeth foreknowledges rhagwybodaeth foreland penrhyn (=headland) foreland rhagdir (=land in front of something) forelands penrhyn (=headland) forelands rhagdir (=land in front of something) foremast hwylbren blaen foremasts hwylbren blaen forensic hypnosis hypnosis fforensig foresail hwyl flaen (jib) foresails hwyl flaen (jib) foreset bed gwely blaen-haen foreset beds gwely blaen-haen foresheet rhaff flaen foresheets rhaff flaen foreshore blaendraeth foreshores blaendraeth foreshorten rhagfyrhau foreshortening rhagfyriad foreshortenings rhagfyriad foreskin blaengroen foreskins blaengroen forest coedwig forest law cyfraith fforest forest laws cyfraith fforest forest school ysgol goedwig forest schools ysgol goedwig forest soils fforestbriddoedd forester coedwigwr foresters coedwigwr forestry coedwigaeth forests coedwig forfeiture fforffediad forfeitures fforffediad forge gefail forge gofannu forge parts rhannau gefail forgery ffugiad forges gefail forgework gwaith gof forgeworks gwaith gof forging gofaniad forging hammer morthwyl gofannu forging hammers morthwyl gofannu forging process proses ofannu forging tongs gefel ofannu forgings gofaniad forgive maddau forgiveness maddeuant fork fforc (for eating or cooking) fork fforch (for digging or lifting, a divergence of anything) fork centre canol fforch fork centres canol fforch fork chuck crafanc fforch fork chucks crafanc fforch forked fforchog forked tenon tyno fforchog forked tenons tyno fforchog forks fforc (for eating or cooking) forks fforch (for digging or lifting, a divergence of anything) form ffurf (=shape) form ffurfio form ffurflen (=document) form a line-out leinio form a star ffurfio seren form and content ffurf a chynnwys form letter llythyr parod form letters llythyr parod form room ystafell ddosbarth form rooms ystafell ddosbarth form sequences ffurfio dilyniannau form teacher athrawes ddosbarth (female) form teacher athro dosbarth (male) form teachers athrawes ddosbarth (female) form teachers athro dosbarth (male) form tools offer ffurfio form tutor tiwtor dosbarth form tutors tiwtor dosbarth form-feed dalen-borthi form-feed dalen-borthiad form-feeds dalen-borthiad form-line ffurflin form-lines ffurflin formal ffurfiol formal algebra algebra ffurfiol formal algebras algebra ffurfiol formal carer gofalydd ffurfiol formal carers gofalydd ffurfiol formal channel of communication sianel cyfathrebu ffurfiol formal drawing lluniad ffurfiol formal drawings lluniad ffurfiol formal group grŵp ffurfiol formal groups grŵp ffurfiol formal gymnastics gymnasteg ffurfiol formal logic rhesymeg ffurfiol formal logics rhesymeg ffurfiol formal operational stage stad weithredu ffurfiol formal operational stages stad weithredu ffurfiol formal operational thought meddwl gweithredu ffurfiol formal operational thoughts meddwl gweithredu ffurfiol formal parameter paramedr ffurfiol formal parameters paramedr ffurfiol formal pattern patrwm ffurfiol formal patterns patrwm ffurfiol formal proof prawf ffurfiol formal proofs prawf ffurfiol formal science education addysg wyddonol ffurfiol formal science educations addysg wyddonol ffurfiol formaldehyde fformaldehyd formaldehydes fformaldehyd formant fformant formants fformant format fformat format fformatio format-mode modd fformat format-modes modd fformat formation ffurfiant (in general) formation trefniant (=arrangement) formations ffurfiant (in general) formations trefniant (=arrangement) formative ffurfiannol formative assessment asesiad ffurfiannol formative assessments asesiad ffurfiannol formative evaluation gwerthusiad ffurfiannol formative evaluations gwerthusiad ffurfiannol formative recording cofnodi ffurfiannol formats fformat formatter fformatydd formatters fformatydd formed follower dilynwr ffurfiedig formed followers dilynwr ffurfiedig former ffurfydd former lake cynlyn former lakes cynlyn formers ffurfydd formic acid asid fformig formic acids asid fformig formica fformica formicas fformica forming tool erfyn ffurfio forming tools erfyn ffurfio forms ffurf (=shape) forms ffurflen (=document) forms of equation of the circle ffurfiau hafaliad y cylch formula fformiwla formulary fformiwlari formulas fformiwla formwork ffurfwaith formworks ffurfwaith fort caer fortepiano fortepiano fortification caer fortifications caer fortified manor house maenordy ag amddiffynfeydd fortified manor houses maenordy ag amddiffynfeydd fortify atgyfnerthu fortress caer forts caer forty-shilling freeholder rhydd-ddeiliad deugain swllt forty-shilling freeholders rhydd-ddeiliad deugain swllt forward blaen forward blaenwr (male) forward blaenwraig (female) forward ymlaen forward and back a double llanw a thrai (in dancing) forward and backward ymlaen ac yn ôl forward and downward ymlaen ac i lawr forward and sideways ymlaen ac i'r ochr forward and upward ymlaen ac i fyny forward arc arc flaen forward arcs arc flaen forward arrow saeth ymlaen forward arrows saeth ymlaen forward chaining cadwyno ymlaen forward paddling stroke strôc badlo ymlaen forward paddling strokes strôc badlo ymlaen forward pass pàs ymlaen forward pivot colyn blaen forward pivots colyn blaen forward policy polisi ymwthiol (of imperialist advance) forward reaction blaenadwaith forward reactions blaenadwaith forward roll rhôl ymlaen forward rolls rhôl ymlaen forward rush cwrs blaenwyr forward rushs cwrs blaenwyr forward thrust gwthiad ymlaen forward thrusts gwthiad ymlaen forwards blaen forwards blaenwr (male) forwards blaenwraig (female) fossil ffosil fossil ffosilaidd fossil fuels tanwydd ffosil fossil record cofnod ffosil fossil records cofnod ffosil fossilation ffosileiddiad fossilations ffosileiddiad fossiliferous ffosilifferaidd fossilize ffosileiddio fossils ffosil foster maethu foster care gofal maeth foster carer gofalwr maeth foster carers gofalwr maeth foster cares gofal maeth foster child plentyn maeth foster childs plentyn maeth foster home cartref maeth foster homes cartref maeth foster mother mam faeth foster mothers mam faeth foster parent rhiant maeth foster parents rhiant maeth fosterage cyfundrefn faeth fosterages cyfundrefn faeth foul trosedd foul play chwarae brwnt foul shot cam ergyd foul shots cam ergyd foul throw camdaflu foulard foulard foulards foulard fouling ffowlio fouls trosedd found sefydlu (establish) found material defnydd hapgael found materials defnydd hapgael found object gwrthrych hapgael found objects gwrthrych hapgael foundation sefydliad (=establishment) foundation sylfaen (=base) foundation sylfaenol foundation bolt bollt sylfaen foundation bolts bollt sylfaen foundation colour lliw sylfaen foundation colours lliw sylfaen foundation course cwrs sylfaen foundation courses cwrs sylfaen foundation garment dilledyn sail foundation garments dilledyn sail foundation stage curriculum cwricwlwm cyfnod sylfaen foundation stage curriculums cwricwlwm cyfnod sylfaen foundation stop stop sylfaen foundation stops stop sylfaen foundation subject pwnc sylfaen foundation subjects pwnc sylfaen foundations sefydliad (=establishment) foundations sylfaen (=base) founder sylfaenydd founders sylfaenydd founding bwrw haearn (e.g. iron) foundry ffowndri foundry ladle lletwad ffowndri foundry ladles lletwad ffowndri foundry mould mowld ffowndri foundry moulds mowld ffowndri foundry sand tywod ffowndri foundry sands tywod ffowndri four pedwar four ball pedair pêl four balls pedair pêl four figure table tabl pedwar ffigur four figure tables tabl pedwar ffigur four hundred metres pedwar can metr four in one canon canon bedwar yn un four lane highway ffordd fawr pedair lôn four points of contact pedwar pwynt cyswllt four-centred arch bwa pedwar canolbwynt four-centred arches bwa pedwar canolbwynt four-division saucer soser bedair rhan four-division saucers soser bedair rhan four-figure grid grid pedwar ffigur four-figure grids grid pedwar ffigur four-jaw chuck crafanc pedair safn four-jaw chucks crafanc pedair safn four-shaft loom gwŷdd pedair siafft four-shaft looms gwŷdd pedair siafft four-stroke pedair strôc four-stroke cycle cylchred pedair strôc four-stroke cycles cylchred pedair strôc four-stroke engine peiriant pedair strôc four-stroke engines peiriant pedair strôc four-way tool post post pedwar erfyn four-way tool posts post pedwar erfyn fours pedwar foursided stitch pwyth petryal foursided stitches pwyth petryal foursome pedwarawd foursomes pedwarawd fourth pedwerydd (interval) fourths pedwerydd (interval) fovea ffofea foveas ffofea fowl cyw iâr fowls cyw iâr fox wedging lletemu cudd fox-wedged wedi'i letemu'n gudd (with masculine nouns) fox-wedged tenon tyno wedi'i letemu'n gudd fox-wedged tenons tyno wedi'i letemu'n gudd foxiness staeniau brown (in wood) foxtrot ffocstrot foxtrots ffocstrot fractal ffractal fractals ffractal fraction ffracsiwn fractional ffracsiynol fractional crystallization grisialu ffracsiynol fractional distillation distyllu ffracsiynol fractionating column colofn ffracsiynu fractionating columns colofn ffracsiynu fractions ffracsiwn fractions of a complete turn ffracsiynau o dro cyflawn fracture toriad fracture torri fractures toriad fragile brau fragment darn fragmentary darniog fragmentation darniad fragmentation of holdings darnio ffermydd fragmentations darniad fragmented tameidiog fragments darn frail bregus frame fframio frame ffrâm frame connector cysylltydd ffrâm frame connectors cysylltydd ffrâm frame construction adeiladwaith ffrâm frame constructions adeiladwaith ffrâm frame of reference ffrâm gyfeirio frame saw llif ffrâm frame saws llif ffrâm frame-weaving worker gweithiwr ffrâm wehyddu frame-weaving workers gweithiwr ffrâm wehyddu framed construction adeiladwaith ffrâm framed constructions adeiladwaith ffrâm framed door drws fframiog framed doors drws fframiog framed roof to fframiog framed roofs to fframiog frames ffrâm framework fframwaith framework member aelod o fframwaith framework members aelod o fframwaith framework of care fframwaith gofal frameworks fframwaith franchise etholfraint (voting right) franchise masnachfraint (in commerce) franchise tir breiniol (land) franchisee deiliad braint franchisees deiliad braint franchises etholfraint (voting right) franchises masnachfraint (in commerce) franchises tir breiniol (land) franchisor breiniwr franchisors breiniwr francium ffranciwm (Fr) franciums ffranciwm (Fr) frankalmoign elusendir frankalmoigns elusendir franklin rhydd-ddeiliad franklins rhydd-ddeiliad frankpledge tangwystl frankpledges tangwystl frater ffreutur fraternal twins gefeilliaid annhebyg (non-identical) fraternity brawdgarwch (=brotherliness) fraternity brawdoliaeth (=group of men) fraters ffreutur fratricide brawd-laddiad fratricides brawd-laddiad fraud twyll frauds twyll fray rhaflad fray rhaflo frayed carpet carped treuliedig frayed carpets carped treuliedig fraying rhaflog frazil ffrasil frazils ffrasil free rhydd free rhyddhau free arm braich rydd (of machine part) free arms braich rydd (of machine part) free bargaining bargeinio rhydd free blending rhyddgymysgu free canon rhyddganon free canons rhyddganon free carbon carbon rhydd free carbons carbon rhydd free church eglwys rydd free churches eglwys rydd free company cwmni hur free counterpoint gwrthbwynt rhydd free counterpoints gwrthbwynt rhydd free curve cromlin rydd free curves cromlin rydd free cutting rhydd-dorri free dancing dawnsio rhydd free electron electron rhydd free electrons electron rhydd free embroidery brodwaith rhydd free energy egni parod free enterprise rhyddfenter free enterprises rhyddfenter free face wyneb rhydd free faces wyneb rhydd free fantasia ffantasia rydd free fantasias ffantasia rydd free flow play chwarae llif rhydd free flowing rhyddlifo free formation trefniant rhydd free formations trefniant rhydd free goods nwyddau di-gost free group grŵp rhydd free groups grŵp rhydd free hit ergyd rydd free hits ergyd rydd free kick cic rydd free kicks cic rydd free machine embroidery brodwaith rhydd â pheiriant free market marchnad rydd free market economy economi marchnad rydd free markets marchnad rydd free metre mesur rhydd free metres mesur rhydd free movement symudiad rhydd free movements symudiad rhydd free painting paentiad rhydd (of painted picture) free painting peintio rhydd (of process or act) free paintings paentiad rhydd (of painted picture) free period gwers rydd free periods gwers rydd free port porthladd rhydd free ports porthladd rhydd free practice ymarfer rhydd free practices ymarfer rhydd free radical radical rhydd free radicals radical rhydd free sale gwerthiant rhydd free sales gwerthiant rhydd free school ysgol rad free schools ysgol rad free slope llethr rhydd free slopes llethr rhydd free space gofod gwag free spaces gofod gwag free stroke symudiad rhydd free strokes symudiad rhydd free style dull rhydd free styles dull rhydd free tenant tenant rhydd free tenants tenant rhydd free thinker rhydd-feddyliwr free thinkers rhydd-feddyliwr free throw tafliad rhydd free throws tafliad rhydd free trade masnach rydd free trades masnach rydd free will ewyllys rydd free wills ewyllys rydd free-body diagram diagram gwrthrych rhydd free-body diagrams diagram gwrthrych rhydd free-fall disgyn yn rhydd free-range egg wy maes free-range eggs wy maes free-range hen iâr faes free-range hens iâr faes free-response question cwestiwn penagored free-response questions cwestiwn penagored free-standing rhydd-sefyll free-standing carcass sgerbwd rhydd-sefyll freedom of a city rhyddfraint dinas freedom of belief rhyddid cred freedom of contract rhyddid contract freedom of thought rhyddid meddwl freehand curve cromlin lawrydd freehand curves cromlin lawrydd freehand design dyluniad llawrydd freehand designs dyluniad llawrydd freehand diagram diagram llawrydd freehand diagrams diagram llawrydd freehand drawing lluniad llawrydd freehand drawings lluniad llawrydd freehand sketch braslun llawrydd freehand sketches braslun llawrydd freehold rhydd-ddaliad freehold land tir rhydd-ddaliol freehold lands tir rhydd-ddaliol freehold property eiddo rhydd-ddaliol freeholder rhydd-ddeiliad freeholders rhydd-ddeiliad freeholds rhydd-ddaliad freely pivot colynnu’n rhydd freeman rhyddfreiniwr freemans rhyddfreiniwr freemason saer rhydd freemasons saer rhydd freephone rhadffôn freephones rhadffôn freeplay chwarae rhydd freeway traffordd freeze rhewi freeze-dry sychrewi freeze-thaw action gwaith rhewi-dadmer freeze-thaw actions gwaith rhewi-dadmer freezer cwpwrdd rhew (cabinet) freezer rhewgell freezer burn llosg rhewgell freezer burns llosg rhewgell freezers cwpwrdd rhew (cabinet) freezers rhewgell freezing compartment blwch rhewi (in fridge) freezing compartments blwch rhewi (in fridge) freezing point rhewbwynt freezing points rhewbwynt freezing rain glasrew freezing rains glasrew freight line lein nwyddau freight lines lein nwyddau freight rate tâl cludo freight rates tâl cludo freight train trên llwythi freight trains trên llwythi frequency amlder (=commonness of occurrence) frequency amledd (=rate of recurrence of vibration etc) frequency distribution dosraniad amlder (of statistics) frequency distributions dosraniad amlder (of statistics) frequency division multiplexing amlblecsu rhaniad amledd frequency of beat amledd curiad frequency of discharge of water amlder gollwng dŵr frequency polygon polygon amlder frequency polygons polygon amlder frequency shift keying allweddu syfliad amledd frequency table tabl amlder (in statistics) frequency tables tabl amlder (in statistics) fresco ffresgo fresh ffres fresh bread bara ffres fresh breads bara ffres fresh breeze awel ffres fresh breezes awel ffres freshwater dŵr croyw freshwaters dŵr croyw fret cribell fret nut talfran fret nuts talfran frets cribell fretsaw llif ffret fretsaws llif ffret fretted cribellog (of musical instrument) fretted rhwyllog (of pattern) fretwork rhwyllwaith fretworks rhwyllwaith friable hyfriw friar brawd friars brawd friary tŷ'r brodyr fricassée fricassée fricassées fricassée friction ffrithiant friction clutch cydiwr ffrithiant friction clutches cydiwr ffrithiant friction drive gyriad ffrithiant friction drives gyriad ffrithiant friction washing golchi ffrithiant friction-compensated ffrithiant-gydadferedig friction-compensateds ffrithiant-gydadferedig frictional grip gafael ffrithiannol frictional grips gafael ffrithiannol frictional unemployment diweithdra ffrithiannol frictional unemployments diweithdra ffrithiannol frictionless diffrithiant frictionless roller rholer diffrithiant frictionless rollers rholer diffrithiant frictions ffrithiant frieze brethyn tewban (material) frieze ffris (architectural) frieze paper papur ffris frieze papers papur ffris friezeman masnachwr brethyn friezemans masnachwr brethyn friezes brethyn tewban (material) friezes ffris (architectural) frigate ffrigad frigates ffrigad frigid zone cylchfa rew frigid zones cylchfa rew frill ffrilen frills ffrilen fringe cwr (of town etc) fringe rhidennu fringe rhidens (=border of loose threads) fringe ymyl (=outer edge) fringe benefit cilfantais fringe benefits cilfantais fringes cwr (of town etc) fringes ymyl (=outer edge) fringing reef ymylriff fringing reefs ymylriff frit ffrit (glaze) frits ffrit (glaze) fritted glaze gwydredd ffrit fritted glazes gwydredd ffrit fritter ffriter fritter batter cytew ffriterau fritter batters cytew ffriterau fritters ffriter frizzling ffrislio frock ffrog frocks ffrog frog jump naid broga frog jumps naid broga frog spawn grifft broga frog spawns grifft broga frond ffrond fronds ffrond front blaen (of position) front ffrynt (of weather) front bodice bodis blaen front bodices bodis blaen front clearance cliriad blaen front clearances cliriad blaen front elevation blaenolwg front elevations blaenolwg front facing wynebyn blaen front facings wynebyn blaen front foot troed flaen front foots troed flaen front loader peiriant blaen-lwytho front loaders peiriant blaen-lwytho front loading kiln odyn blaen-lwytho front loading kilns odyn blaen-lwytho front office service gwasanaeth blaen swyddfa front office services gwasanaeth blaen swyddfa front opening agoriad blaen front openings agoriad blaen front panel panel blaen front panels panel blaen front rake gwyredd blaen front rakes gwyredd blaen front roller rholer blaen front rollers rholer blaen front row rheng flaen front rows rheng flaen front support ymgynnal blaen (in athletics) front suspension hongiad blaen front suspensions hongiad blaen front wall mur blaen front wall out of court line ffin flaen front walls mur blaen front-end processor blaen-brosesydd front-end processors blaen-brosesydd frontal apron ffedog flaen frontal aprons ffedog flaen frontal bone asgwrn talcen frontal bones asgwrn talcen frontal fog niwl ffrynt frontal fogs niwl ffrynt frontal lobe llabed flaen frontal lobes llabed flaen frontal rain glaw ffrynt frontal rains glaw ffrynt frontality blaenluniad frontier ffin frontier district ardal ffiniol frontier districts ardal ffiniol frontier state cyffinwlad frontier states cyffinwlad frontier zone parth ffiniol frontier zones parth ffiniol frontiers ffin frontispiece wynebddarlun frontispieces wynebddarlun frontogenesis ffryntdarddiad frontolysis ffryntwasgariad frontoparietal blaenbaredol frontosphenoidal blaensffenoidol fronts blaen (of position) fronts ffrynt (of weather) frost rhew frost action gwaith rhew frost actions gwaith rhew frost attack ymosodiad gan rew frost attacks ymosodiad gan rew frost heaving gwthiad rhew frost heavings gwthiad rhew frost hollow pant rhew frost hollows pant rhew frost line rhewlin frost lines rhewlin frost shattered rhewfriw frostbite ewinrhew frostbites ewinrhew frosted barugog frosts rhew frothy ewynnog frottage ffrotais (rubbing) frottage ffroteisio frottages ffrotais (rubbing) frozen food market marchnad y bwydydd rhewedig frozen food markets marchnad y bwydydd rhewedig fructose ffrwctos fructoses ffrwctos fruit ffrwyth (in general) fruit ffrwythyn (a single) fruit and vegetables ffrwythau a llysiau fruit bowl ffiol ffrwythau fruit bowls ffiol ffrwythau fruit cake teisen ffrwythau fruit cakes teisen ffrwythau fruit crumble crymbl ffrwythau fruit crumbles crymbl ffrwythau fruit fool ffŵl ffrwythau fruit fools ffŵl ffrwythau fruit juice sudd ffrwythau fruit juices sudd ffrwythau fruit snow eirffrwyth fruit snows eirffrwyth fruiting body ffrwythgorff fruits ffrwyth (in general) fruits ffrwythyn (a single) fruity ffrwythus frustrate drysu (hopes) frustrated rhwystredig frustration rhwystredigaeth frustrations rhwystredigaeth frustum ffrwstwm frustum of cone ffrwstwm côn frustum of pyramid ffrwstwm pyramid frustums ffrwstwm fry ffrio frying pan padell ffrio frying pans padell ffrio fucoxanthin ffwcosanthin fucoxanthins ffwcosanthin fudge cyffug (confectionery) fudges cyffug (confectionery) fuel tanwydd fuel cell cell danwydd fuel cells cell danwydd fuel consumption traul tanwydd fuel consumptions traul tanwydd fuel supply cyflenwad tanwydd fuels tanwydd fugal ffiwgaidd fugato ffiwgato fughetta ffiwgeta fughettas ffiwgeta fugitive ffoadur fugitive colour lliw diflan fugitive colours lliw diflan fugitives ffoadur fugue ffiwg fugue form ffurf ffiwg fugue forms ffurf ffiwg fugues ffiwg fulcrum ffwlcrwm fulcrums ffwlcrwm fulfil cyflawni fulfilling life bywyd boddhaus fulfilling lifes bywyd boddhaus full anthem anthem lawn full anthems anthem lawn full back cefnwr (male) full back cefnwraig (female) full backs cefnwr (male) full backs cefnwraig (female) full bilingualism dwyieithrwydd llawn full bilingualisms dwyieithrwydd llawn full central heating gwres canolog llawn full central heatings gwres canolog llawn full control rheolaeth lawn full controls rheolaeth lawn full cost price pris llawn full cost prices pris llawn full drop llithr llawn full drops llithr llawn full employment cyflogaeth lawn full employments cyflogaeth lawn full helix helics llawn full helixes helics llawn full immersion trochiad llawn full immersions trochiad llawn full knees bend gliniau'n blyg i'r eithaf full moon lleuad lawn full moons lleuad lawn full organ organ lawn full organs organ lawn full radiation pelydriad cyflawn (black body) full radiations pelydriad cyflawn (black body) full range of ability ystod lawn o allu full score sgôr lawn full scores sgôr lawn full screen editor sgrin-olygydd full screen editors sgrin-olygydd full size maint llawn full size court cwrt llawn maint full size courts cwrt llawn maint full sizes maint llawn full stop atalnod llawn full stops atalnod llawn full time amser llawn full times amser llawn full toss pelen lawn full version fersiwn llawn full versions fersiwn llawn full weight rope rhaff bwysau llawn full weight ropes rhaff bwysau llawn full-adder adydd cyflawn full-adders adydd cyflawn full-duplex dwplecs cyflawn full-duplexes dwplecs cyflawn full-length portrait portread hyd llawn full-length portraits portread hyd llawn full-screen llond sgrin full-time llawn amser fuller pannwr fuller's earth pridd y pannwr fuller's earths pridd y pannwr fullering pannu fullering tool erfyn pannu fullering tools erfyn pannu fullers pannwr fulling pannu fulling mill pandy fulling mills pandy fullness llawnder fullsize mock-up brasfodel maint llawn fullsize mock-ups brasfodel maint llawn fumarole mygdwll fumaroles mygdwll fumble ymbalfalu fume mygdarth fume mygdarthu fume cupboard cwpwrdd gwyntyllu fume cupboards cwpwrdd gwyntyllu fumes mygdarth fumigate mygdarthu fuming mygdarthol fun song cân hwyl fun songs cân hwyl function ffwythiant (in mathematics) function swyddogaeth (in general) function code cod swyddogaeth function codes cod swyddogaeth function key bysell swyddogaeth functional ffwythiannol (of mathematical functions) functional swyddogaethol (of purpose or task) functional area adran swyddogaethol functional areas adran swyddogaethol functional art celfyddyd swyddogaethol functional arts celfyddyd swyddogaethol functional assessment asesiad perfformiad functional assessments asesiad perfformiad functional design dylunio swyddogaethol functional difference gwahaniaeth gweithredol functional differences gwahaniaeth gweithredol functional group grŵp gweithredol (in chemistry) functional groups grŵp gweithredol (in chemistry) functional illiteracy anllythrennedd gweithredol functional literacy llythrennedd gweithredol functional niche cilfach weithredol functional niches cilfach weithredol functional reading darllen gweithredol functional readings darllen gweithredol functional surface arwyneb swyddogaethol functional surfaces arwyneb swyddogaethol functionalism swyddogaetholdeb (in psychology) functionalisms swyddogaetholdeb (in psychology) functionalist swyddogaethwr functionalists swyddogaethwr functions ffwythiant (in mathematics) functions swyddogaeth (in general) fund cronfa fundamental sylfaen fundamental sylfaenol fundamental attribution bias tuedd priodoliad sylfaenol fundamental circuit cylched sylfaenol fundamental circuits cylched sylfaenol fundamental discord anghytgord sylfaenol fundamental discords anghytgord sylfaenol fundamental dominant chord cord sylfaenol y llywydd fundamental dominant chords cord sylfaenol y llywydd fundamental dominant discord anghytgord sylfaenol y llywydd fundamental dominant discords anghytgord sylfaenol y llywydd fundamental interval cyfwng sylfaenol fundamental intervals cyfwng sylfaenol fundamental note nodyn sylfaenol fundamental notes nodyn sylfaenol fundamental shape ffurf sylfaenol fundamental shapes ffurf sylfaenol fundamental temperature tymheredd sylfaenol fundamental temperatures tymheredd sylfaenol fundamentalism ffwndamentaliaeth fundamentalisms ffwndamentaliaeth fundamentals sylfaen funds cronfa fundus ffwndws funeral march ymdeithgan angladd funeral marches ymdeithgan angladd fungal ffwngaidd fungal attack ymosodiad ffwng fungal attacks ymosodiad ffwng fungicide ffwngleiddiad fungicides ffwngleiddiad fungus ffwng funicular rheilffordd halio funicular polygon polygon rhaff funicular polygons polygon rhaff funiculars rheilffordd halio funnel twndish funnel stake bonyn twndish funnel stakes bonyn twndish funnels twndish fur cen (in pipes etc) fur ffwr (of animals) fur fabric ffabrig ffwr fur fabrics ffabrig ffwr furlong ystaden furlongs ystaden furnace ffwrnais furnaces ffwrnais furnished accommodation llety wedi'i ddodrefnu furnished accommodations llety wedi'i ddodrefnu furnishing fabric ffabrig dodrefnu furnishing fabrics ffabrig dodrefnu furniture dodrefn furniture beetle chwilen ddodrefn furniture beetles chwilen ddodrefn furniture polish llathrydd dodrefn furniture polishs llathrydd dodrefn furniture store siop ddodrefn furniture stores siop ddodrefn furniture wax cwyr dodrefn furniture waxes cwyr dodrefn furrow cwys furrows cwys further education addysg bellach further educations addysg bellach further recognised stroke strôc gydnabyddedig bellach further recognised strokes strôc gydnabyddedig bellach fuse ffiws (of device) fuse ffiwsio (when a fuse blows) fuse ymdoddi (=melt) fuse ymdoddiad (=melt) fused ymdoddedig fuses ffiws (of device) fuses ymdoddiad (=melt) fusible ymdoddadwy fusible alloy aloi ymdoddadwy fusible clay clai ymdoddadwy fusiform gwerthydffurf fusiforms gwerthydffurf fusing factor ffactor ymdoddi fusing factors ffactor ymdoddi fusing point ymdoddbwynt fusing points ymdoddbwynt fusion ymasiad (nuclear, cells etc) fusion ymdoddiad (=melting) fusions ymasiad (nuclear, cells etc) fusions ymdoddiad (=melting) future generations cenedlaethau i ddod future teaching addysgu pellach futurism dyfodoliaeth futurisms dyfodoliaeth futuristic dyfodolaidd fuzzification niwlo fuzzy logic rhesymeg niwlog fuzzy logics rhesymeg niwlog fuzzy set set niwlog fuzzy sets set niwlog g cydbwysedd (=balance) gabbro gabro gaberdine gaberdîn gable end talcen gable ends talcen gadget dyfais gadgets dyfais gadolinium gadoliniwm (Gd) gadoliniums gadoliniwm (Gd) gain cynnydd (=increase) gain ennill (=profit) gain access cael mynediad gain confidence ennill hyder gain control rheolydd cynnydd gain controls rheolydd cynnydd gain ground ennill tir gainful worker gweithiwr cyflog gainful workers gweithiwr cyflog gains cynnydd (=increase) gains ennill (=profit) gait cerddediad gaiter coesarn gaiters coesarn gaits cerddediad galactagogue blithogydd galactagogues blithogydd galactic galaethog galactosaemia galactosaemia galactosaemias galactosaemia galactose galactos galactoses galactos galaxy galaeth gale tymestl galena galena galenas galena gales tymestl gall ardyfiant planhigol (on plants) gall bustl (bile) gall-bladder coden y bustl gall-bladders coden y bustl galleon galiwn galleons galiwn gallery oriel (in the arts) gallery ponc (in quarrying) gallery forest coedwig galeri gallery forests coedwig galeri galley gali galliard galliard galliards galliard gallipot pot golchdrwyth gallipots pot golchdrwyth gallium galiwm (Ga) galliums galiwm (Ga) gallon galwyn gallons galwyn gallop carlam gallop carlamu gallops carlam galls ardyfiant planhigol (on plants) galls bustl (bile) gallstone carreg y bustl gallstones carreg y bustl galvanic galfanig galvanization galfaneiddiad galvanizations galfaneiddiad galvanize galfanu galvanized galfanedig galvanized iron haearn galfanedig galvanized irons haearn galfanedig galvanized window ffenestr alfanedig galvanized windows ffenestr alfanedig galvanized wire gwifren alfanedig galvanized wires gwifren alfanedig galvanometer galfanomedr galvanometers galfanomedr gamba gamba (organ stop) gambas gamba (organ stop) gamboge tint arlliw gamboge gamboge tints arlliw gamboge game gêm game form ffurf ar gêm game forms ffurf ar gêm game laws deddfau helwriaeth game theory damcaniaeth gemau gamekeeper ciper gamekeepers ciper games gêm games equipment offer chwaraeon games teacher athrawes chwaraeon (female) games teacher athro chwaraeon (male) games teachers athrawes chwaraeon (female) games teachers athro chwaraeon (male) gamete gamet gametes gamet gametocyte gametocyt gametocytes gametocyt gametogenesis gametogenesis gametophore gametoffor gametophores gametoffor gametophyte gametoffyt gametophytes gametoffyt gamgee gwlân gamgees gwlân gamma radiation pelydriad gama gamma radiations pelydriad gama gamma ray pelydryn gama gamopetalous gamopetalog gamosepalous gamosepalog gamut gamwt gamuts gamwt gang gang ganglion ganglion ganglionic ganglionig ganglions ganglion gangrene madredd gangrenes madredd gangs gang gap adwy (made for a purpose) gap bwlch (in general) gap town tref adwy gap towns tref adwy gapped bylchog gapped edge ymyl fylchog gapped edges ymyl fylchog garage garej (with a private dwelling) garage modurdy (of commercial enterprise) garages garej (with a private dwelling) garages modurdy (of commercial enterprise) garaging cadw car garbage sbwriel garbages sbwriel garden gardd garden garddio garden city gardd-ddinas gardens gardd gargoyle gargoil gargoyles gargoil garland garlant garlands garlant garment dilledyn garments dilledyn garnet paper papur garnet garnet papers papur garnet garrison garsiwn garrisons garsiwn garter gardys garter stitch pwyth gardys garter stitches pwyth gardys garters gardys gas nwy gas cylinder silindr nwy gas cylinders silindr nwy gas exchange cyfnewid nwyon gas fire tân nwy gas fires tân nwy gas law deddf nwyon gas laws deddf nwyon gas lighter taniwr nwy gas lighters taniwr nwy gas phase gwedd nwy gas phases gwedd nwy gas poker pocer nwy gas pokers pocer nwy gas-liquid chromatography cromatograffaeth hylif nwy gas-ring cylch nwy gas-rings cylch nwy gaseous nwyol gaseous exchange cyfnewid nwyol gaseous exchanges cyfnewid nwyol gash vein craig-wythïen gash veins craig-wythïen gashed edge ymyl wedi'i niweidio gashed edges ymyl wedi'i niweidio gasket gasged gaskets gasged gastight nwyglos gastric gastrig gastric gland chwarren gastrig gastric glands chwarren gastrig gastric juice sudd gastrig gastric juices sudd gastrig gastric pit mân-bant gastrig gastric pits mân-bant gastrig gastro-enteritis gastro-enteritis gastro-enterology gastro-enteroleg gastrocnemius croth y goes gastrointestinal pibell gastroberfeddol (tract) gastrointestinals pibell gastroberfeddol (tract) gastrula gastrwla gastrulas gastrwla gastrulation gastrwliad gastrulations gastrwliad gate adwy (in electronics, computing) gate clwyd (=hurdle) gate llidiart (of garden) gate porthell (in metallurgy) gate and knife tool erfyn porthellu a chyllell gate and knife tools erfyn porthellu a chyllell gate delay oediad adwy gate latch clicied llidiart gate latches clicied llidiart gate tool erfyn porthellu gate tools erfyn porthellu gate vault llofnaid glwyd gate vaults llofnaid glwyd gate-leg table bwrdd coes gât gate-leg tables bwrdd coes gât gated adwyog gatekeeping didoli (in administration of cases) gates adwy (in electronics, computing) gates clwyd (=hurdle) gates llidiart (of garden) gates porthell (in metallurgy) gateway porth gather crych gather crychdynnu gathered fullness llawnder wedi'i grychdynnu gathered lace les wedi'i grychdynnu gathered laces les wedi'i grychdynnu gathered skirt sgert grychog gathered skirts sgert grychog gatherer casglwr (in general) gatherer crychell (machine attachment) gatherers casglwr (in general) gatherers crychell (machine attachment) gathering crychiad (in material) gathering note nodyn casglu gathering notes nodyn casglu gatherings crychiad (in material) gathers crych gauge lled rheilffordd (of railway) gauge medrydd (=instrument) gauge medryddu gauge block bloc medrydd gauge blocks bloc medrydd gauges lled rheilffordd (of railway) gauges medrydd (=instrument) gauze rhwyllen gauze rhwyllog gauze cloth lliain rhwyllog gauze cloths lliain rhwyllog gauze swab swab rhwyllog gauze swabs swab rhwyllog gauzes rhwyllen gavelkind cyfran gavelkinds cyfran gavotte gavotte gavottes gavotte gear gêr (of vehicle, lathe) gear taclau (=equipment) gear mechanism mecanwaith gêr gear mechanisms mecanwaith gêr gear ratio cymhareb gêr gear tooth dant gêr gear tooths dant gêr gear train trên gêr gear trains trên gêr gear wheel olwyn gêr gear wheels olwyn gêr gearbox blwch gêr gearboxes blwch gêr gearing ratio cymhareb geriad gears gêr (of vehicle, lathe) gel gel gel coat araen gel gel coats araen gel gel medium cyfrwng gel gel mediums cyfrwng gel gelatine gelatin gelatine size seis gelatin gelatine sizes seis gelatin gelatines gelatin gelatinous gelaidd gelatinous state cyflwr gelaidd gelatinous states cyflwr gelaidd gelation geliad gelations geliad gelifluction oerlif gelifluctions oerlif gem gem gemma blaguryn gemmas blaguryn gemmule gemwl gemmules gemwl gemshorn gemshorn gemshorns gemshorn gender rhyw (=sex) gender rhyw y person gender bias gogwydd o ran rhyw gender-stereotyped stereoteipio o ran rhyw genders rhyw (=sex) genders rhyw y person gene genyn gene complex cymhlygyn genynnol gene complexes cymhlygyn genynnol gene frequency amlder genynnol gene locus locws genyn gene pool cyfanswm genynnol gene pools cyfanswm genynnol gene recombination adgyfuno genynnol gene therapy therapi genynnau genealogical achyddol genealogy achyddiaeth general cadfridog general cyffredinol general Christian character cymeriad cyffredinol Cristnogol general Christian characters cymeriad cyffredinol Cristnogol general ability gallu cyffredinol general ability test prawf gallu cyffredinol general ability tests prawf gallu cyffredinol general anaesthetic anaesthetig cyffredinol general anaesthetics anaesthetig cyffredinol general defence amddiffyniad cyffredinol general defences amddiffyniad cyffredinol general degree gradd gyffredinol general degrees gradd gyffredinol general election etholiad cyffredinol general elections etholiad cyffredinol general feature nodwedd gyffredinol general features nodwedd gyffredinol general gas equation hafaliad cyffredinol nwy general gas equations hafaliad cyffredinol nwy general hospital ysbyty cyffredinol general hospitals ysbyty cyffredinol general improvement area ardal gwelliannau cyffredinol general improvement areas ardal gwelliannau cyffredinol general medicine meddygaeth gyffredinol general medicines meddygaeth gyffredinol general objective amcan cyffredinol general objectives amcan cyffredinol general pause daliant cyffredinol (of orchestra) general pauses daliant cyffredinol (of orchestra) general post office prif swyddfa'r post general post offices prif swyddfa'r post general practitioner meddyg teulu general practitioners meddyg teulu general purpose area llecyn at ddibenion cyffredinol general purpose areas llecyn at ddibenion cyffredinol general sales gwerthiant cyffredinol general schools budget cyllideb gyffredinol i ysgolion general schools budgets cyllideb gyffredinol i ysgolion general session sesiwn gyffredinol general sessions sesiwn gyffredinol general space gofod cyffredinol general spaces gofod cyffredinol general staff staff milwrol general store siop bob peth general stores siop bob peth general strike streic gyffredinol general strikes streic gyffredinol general subject level lefel gyffredinol y pwnc general subject levels lefel gyffredinol y pwnc general surgery llawfeddygaeth gyffredinol generalisation cyffredinoliad generalisations cyffredinoliad generalised cyffredinoledig generalised animal cell cyffredinoliad o gell anifail generalised animal cells cyffredinoliad o gell anifail generaliseds cyffredinoledig generality cyffredinolrwydd generalize cyffredinoli generals cadfridog generate cynhyrchu (in general) generate generadu (with generator) generating capacity gallu cynhyrchu generation cenhedlaeth (=age-group) generation generadiad (of heat, light) generation time amser mitotig (in biology) generation times amser mitotig (in biology) generations cenhedlaeth (=age-group) generations generadiad (of heat, light) generative cenhedlol generator generadur generator of sound generadur sain generators generadur generic generig generic convention confensiwn generig generic conventions confensiwn generig generic skills sgiliau generig generic theme thema generig generic themes thema generig genes genyn genetic genetig genetic code cod genynnol genetic codes cod genynnol genetic drift symudiad genetig genetic drifts symudiad genetig genetic engineering peirianneg genetig genetic engineerings peirianneg genetig genetic equilibrium cydbwysedd genetig genetic equilibriums cydbwysedd genetig genetic factor ffactor genetig genetic factors ffactor genetig genetic fingerprinting adnabod ôl bys genynnol genetic isolation arwahaniad genynnau genetic isolations arwahaniad genynnau genetic variant amrywiolyn genetig genetic variants amrywiolyn genetig genetic variation amrywiad genetig genetic variations amrywiad genetig genetically modified a’u genynnau wedi’u haddasu genetics geneteg genital cenhedlol genitals organau cenhedlu genius athrylith genocide hil-laddiad genocides hil-laddiad genome genom genomer genomer genomers genomer genomes genom genosome genosom genosomes genosom genotype genoteip genotypes genoteip genotypic genoteipaidd genotypic frequency amlder genoteipaidd genre genre genres genre gentle curve cromlin raddol gentle curves cromlin raddol gentleman bonheddwr gentlemans bonheddwr gentlemen's agreement cytundeb rhwng cyfeillion gentlemen's agreements cytundeb rhwng cyfeillion gently rounded slope llethr esmwyth crwn gently rounded slopes llethr esmwyth crwn gentry bonedd genus genws geoanticline geoanticlin geoanticlines geoanticlin geoboard geofwrdd geoboards geofwrdd geochemical geocemegol geochronology geocronoleg geochronometry geocronometreg geode geod geodes geod geodesic geodesig geodesy geodedd geodetic geodetig geodimeter geodimedr geodimeters geodimedr geographical concept cysyniad daearyddol geographical concepts cysyniad daearyddol geographical context cyd-destun daearyddol geographical contexts cyd-destun daearyddol geographical enquiry ymholiad daearyddol geographical feature nodwedd ddaearyddol geographical features nodwedd ddaearyddol geographical information system system gwybodaeth ddaearyddol geographical information systems system gwybodaeth ddaearyddol geography daearyddiaeth geoid geoid geoids geoid geology daeareg geometric geometrig geometric concept cysyniad geometrig geometric concepts cysyniad geometrig geometric construction lluniad geometrig geometric constructions lluniad geometrig geometric design dyluniad geometrig geometric designs dyluniad geometrig geometric grid grid geometrig geometric grids grid geometrig geometric mean cymedr geometrig geometric means cymedr geometrig geometric pattern patrwm geometrig geometric patterns patrwm geometrig geometric progression dilyniant geometrig geometric progressions dilyniant geometrig geometric series cyfres geometrig geometric shape siâp geometrig geometric shapes siâp geometrig geometric tolerancing goddefiannu geometrig geometrical geometregol geometrical method dull geometregol geometrical methods dull geometregol geometrical proportion cyfrannedd geometregol geometrical proportions cyfrannedd geometregol geometry geometreg geomorphic environment amgylchedd geomorffig geomorphic environments amgylchedd geomorffig geomorphic process proses geomorffig geomorphological geomorffolegol geomorphological process proses geomorffolegol geomorphology geomorffoleg geophysics geoffiseg geophyte geoffyt geophytes geoffyt geopolitics geowleidyddiaeth georgette georgette georgettes georgette geostrophic geostroffig geosyncline geosynclin geosynclines geosynclin geotaxis geotacsis geothermal geothermol geotropism geotropedd geotropisms geotropedd geraniol geraniol geraniols geraniol gerbil gerbil gerbils gerbil geriatric geriatrig geriatrician geriatregydd geriatricians geriatregydd geriatrification heneiddiad geriatrifications heneiddiad germ germ germ layer haenen ymrannu (embryo) germ layers haenen ymrannu (embryo) germ-cell cell genhedlu germ-cells cell genhedlu germanium germaniwm (Ge) germaniums germaniwm (Ge) germinal cenhedlol (relating to reproduction) germinal epithelium epitheliwm cenhedlol germinal epitheliums epitheliwm cenhedlol germinal ridge crib genhedlol germinal ridges crib genhedlol germinate egino germinating seed hedyn eginol germinating seeds hedyn eginol germinating temperature tymheredd egino germinating temperatures tymheredd egino germination eginiad germinations eginiad germs germ gesso geso gestation period cyfnod cario (of woman) gestation period cyfnod cyfebru (of animal) gestation periods cyfnod cario (of woman) gestation periods cyfnod cyfebru (of animal) gesture ystum gesture ystumio gestures ystum geyser geiser geysers geiser ghetto geto giant cawr giant enfawr (cells, chromosomes etc) giant chromosome cromosom enfawr giant chromosomes cromosom enfawr giant molecular moleciwlaidd enfawr giant star seren gawr giant stars seren gawr giant structure adeiledd enfawr giant structures adeiledd enfawr giants cawr gib strip stribed gib gib strips stribed gib gibberellic acid asid giberelig gibberellic acids asid giberelig gibberellin giberelin gibberellins giberelin giddiness pendro gifted dawnus gifted child plentyn dawnus gifted childs plentyn dawnus gigabyte gigabeit (Gb) gigabytes gigabeit (Gb) gigantic anferth gigue gigue gigues gigue gild euro gilded goreurog gilding metal metel euro gilding metals metel euro gill tagell (of fish, mushrooms etc) gill tagellog gill arch bwa tagell gill arches bwa tagell gill filament ffilament tagell gill filaments ffilament tagell gill plate plât tagell gill plates plât tagell gill raker cribin dagell gill rakers cribin dagell gill slit agen y dagell gill slits agen y dagell gills tagell (of fish, mushrooms etc) gilt goreurog gilt glass gwydr goreurog gimlet gimbil gimlet point pwynt gimbil gimlet points pwynt gimbil gimlets gimbil gimp pin pìn gimp gimp pins pìn gimp ginger biscuit bisged sinsir ginger biscuits bisged sinsir gingham gingham ginghams gingham ginnery melin gotwm girder hytrawst girders hytrawst girdle gwregys girdle scar craith gylchog girdle scars craith gylchog girdles gwregys girth cwmpas girths cwmpas given instant ennyd benodol given instants ennyd benodol gizzard glasog gizzards glasog glabrous llyfn glacial rhewlifol glacial chronology cronoleg rewlifol glacial drift drifft rhewlifol glacial drifts drifft rhewlifol glacial erosion erydiad rhewlifol glacial erosions erydiad rhewlifol glacial lake rhewlyn glacial lakes rhewlyn glacial maximum uchafbwynt rhewlifol glacial maximums uchafbwynt rhewlifol glaciate rhewlifo glaciation rhewlifiant glaciations rhewlifiant glacier milk llaeth rhewlif glacier milks llaeth rhewlif glacier snout blaen rhewlif glacier snouts blaen rhewlif glacier sole gwadn rhewlif glacier soles gwadn rhewlif glaciologist rhewlifwr glaciologists rhewlifwr glaciology rhewlifeg glacé cherry ceiriosen glacé gladiator gladiator gladiators gladiator glair glaer glair glaeru glairs glaer glance adlam (=ricochet) glance gwyro (in batting) glances adlam (=ricochet) gland chwarren glands chwarren glandular chwarennol glans penis blaen pidyn glare llacharedd glares llacharedd glass drych (=mirror) glass gwydr (of material or object) glass blowing gwydr-chwythu glass chime clychsain gwydr glass chimes clychsain gwydr glass fibre gwydrffibr glass fibres gwydrffibr glass mat mat gwydr glass mats mat gwydr glass mosaic mosaig gwydr glass mosaics mosaig gwydr glass panel panel gwydr glass panels panel gwydr glass rod rhoden wydr glass rods rhoden wydr glass slab slab gwydr glass slabs slab gwydr glass wool gwlân gwydr glass wools gwlân gwydr glass-reinforced fibre ffibr wedi'i atgyfnerthu â gwydr glass-reinforced fibres ffibr wedi'i atgyfnerthu â gwydr glasscloth brethyn llyfnu glasscloths brethyn llyfnu glasshouse tŷ gwydr glasshouses tŷ gwydr glassware llestri gwydr glassy gwydrog glaucous llwydwyrdd glaucous gull gwylan y gogledd glaucous gulls gwylan y gogledd glaze gwydredd (=glassy covering) glaze gwydro (with glassy covering) glaze sglein (=shine) glaze sgleinio (=shine) glaze firing tanio gwydrog glaze stain staen gwydredd glaze stains staen gwydredd glazed gwydrog (with glassy covering) glazed sglein (=shiny) glazed cotton cotwm sglein glazed cottons cotwm sglein glazed crockery llestri wedi'u gwydro glazed door drws gwydrog glazed doors drws gwydrog glazed paper papur sglein glazed papers papur sglein glazed surface arwyneb gwydrog glazed surfaces arwyneb gwydrog glazes gwydredd (=glassy covering) glazes sglein (=shine) glazing bar bar gwydro glazing bars bar gwydro glebeland clastir glebelands clastir glee club clwb glee glee clubs clwb glee glenoid cavity crau glenoid gley glei gleying gleio glial gliaidd glials gliaidd glide llithriad glide llithro glide llithrydd (sliding door) glider gleider gliders gleider glides llithriad glides llithrydd (sliding door) gliding joint cymal llithro gliding joints cymal llithro glint-line lake llyn glintlin glint-line lakes llyn glintlin glissade glissade glissades glissade global byd-eang (=worldwide) global eang (in computing) global distribution of population dosbarthiad byd-eang poblogaeth global energy egni'r byd global environment amgylchedd byd-eang global environments amgylchedd byd-eang global pattern patrwm byd-eang global patterns patrwm byd-eang global sport chwaraeon byd-eang global tectonic process proses dectonig fyd-eang global trial function ffwythiant prawf globaidd global trial functions ffwythiant prawf globaidd global variable newidyn eang global variables newidyn eang global warming cynhesu byd-eang globalization globaleiddio globe glôb globe artichoke artisiog glôb globe artichokes artisiog glôb globes glôb globular crwn globular clusters clystyrau crwn globule globwl globules globwl globulin globwlin globulins globwlin glockenspiel glockenspiel glockenspiels glockenspiel glomerular filtrate hidlif glomerwlaidd glomerular filtrates hidlif glomerwlaidd glomerulus glomerwlws gloss sglein gloss paint paent sglein gloss paints paent sglein glossopharyngeal glosoffaryngeal glossy sgleiniog glossy cane gwialen loyw glossy canes gwialen loyw glossy finish gorffeniad sgleiniog glossy finishs gorffeniad sgleiniog glossy paper papur sglein glossy papers papur sglein glossy surface arwyneb sglein glossy surfaces arwyneb sglein glottis glotis gloup mordwll gloups mordwll glove maneg glove-puppet pyped maneg glove-puppet movement symudiad pyped maneg glove-puppet movements symudiad pyped maneg glove-puppets pyped maneg gloves maneg glow tywyn glow tywynnu glowing tywynnol glowing splint prennyn yn mudlosgi (in chemistry) glowing splints prennyn yn mudlosgi (in chemistry) glows tywyn glucagon glwcagon glucagons glwcagon glucose glwcos glucose oxidase glwcos ocsidas glucose oxidases glwcos ocsidas glucose tolerance test prawf goddefiad glwcos glucose tolerance tests prawf goddefiad glwcos glucose-1-phosphate glwcos-1-ffosffad glucose-1-phosphates glwcos-1-ffosffad glucoses glwcos glucosuria glwcoswria glucosurias glwcoswria glue glud glue gludio glue block bloc glud glue blocks bloc glud glue brush brwsh glud glue brushs brwsh glud glue ear gormod o gwyr yn y glust glue kettle tegell glud glue kettles tegell glud glue pot pot glud glue pots pot glud glue size seis glud glue sizes seis glud glue sniffing arogli glud glued blocks blociau wedi'u gludio glued-on panel panel wedi'i ludio glued-on panels panel wedi'i ludio glues glud gluing surface arwyneb gludio gluing surfaces arwyneb gludio gluon glwon gluons glwon glutamic acid asid glwtamig glutamic acids asid glwtamig glutamine glwtamin glutamines glwtamin glycerine glyserin glycerines glyserin glycerol glyserol glycerols glyserol glycine glycin glycines glycin glycogen glycogen glycogen synthetase glycogen synthetas glycogen synthetases glycogen synthetas glycogens glycogen glycolysis glycolysis glycoprotein glycoprotein glycoproteins glycoprotein glycoside glycosid glycosides glycosid glycosidic glycosidaidd glyptic art celfyddyd glyptig glyptic arts celfyddyd glyptig gnomonic projection tafluniad nomonig gnomonic projections tafluniad nomonig go about ogamu (in sport) goal cyrchnod (=aim) goal gôl (in sport) goal area cwrt y gôl goal areas cwrt y gôl goal board bwrdd gôl goal boards bwrdd gôl goal kick cic gôl goal kicks cic gôl goal line llinell gôl goal lines llinell gôl goal net rhwyd gôl goal nets rhwyd gôl goal post postyn gôl goal posts postyn gôl goal setting gosod nod (in policy making) goal shooter saethwr goal shooters saethwr goalkeeper gôl-geidwad goalkeepers gôl-geidwad goalpost postyn goalposts postyn goals cyrchnod (=aim) goals gôl (in sport) goat-hair brush brwsh blew gafr goat-hair brushs brwsh blew gafr gobelin stitch pwyth gobelin gobelin stitches pwyth gobelin goblet gobled goblet cell cell gobled goblet cells cell gobled goblets gobled god duw godet godet godets godet goffering goffro goggles goglau going gofod llorwedd (stairs) goings gofod llorwedd (stairs) goitre gwen, y wen goitres gwen, y wen gold aur (Au) gold cushion clustog aur gold cushions clustog aur gold leaf deilen aur gold leaf electroscope electrosgop deilen aur gold leaf electroscopes electrosgop deilen aur gold leafs deilen aur gold medal medal aur gold medals medal aur gold size seis aur gold sizes seis aur gold thread edau aur gold threads edau aur gold tooling foil ffoil offeru aur gold tooling foils ffoil offeru aur gold tooling leaf deilen offeru aur gold tooling leafs deilen offeru aur golden bread crumbs briwsion cras golden rectangle petryal euraid golden rectangles petryal euraid golden rule rheol euraidd golden rules rheol euraidd golden section adran euraid golden sections adran euraid golds aur (Au) goldsmith gof aur goldsmiths gof aur golf links maes golff gomarist gomaraidd gomarist gomarwr gomarists gomarwr gonad gonad gonadotrophic gonadotroffig gonadotrophic hormone hormon gonadotroffig gonadotrophic hormones hormon gonadotroffig gonadotrophin gonadotroffin gonadotrophins gonadotroffin gonads gonad gonorrhoea gonorea gonorrhoeas gonorea good balance cydbwysedd da good balances cydbwysedd da good ball pêl dda good balls pêl dda good length hyd da good length ball bowliad hyd da good length balls bowliad hyd da good lengths hyd da good loser collwr da good losers collwr da good posture ymddaliad da good postures ymddaliad da good practice ymarfer da good practices ymarfer da good proportion cyfrannedd da good proportions cyfrannedd da good quality wood pren o ansawdd da good quality woods pren o ansawdd da good sporting behaviour ymddygiad da wrth chwarae good sporting behaviours ymddygiad da wrth chwarae good technique techneg dda good techniques techneg dda good timing amseru da good works gweithredoedd da good-enough parenting magu digon da goods nwyddau goods and chattels nwyddau a meddiannau goods or services nwyddau neu wasanaethau goodwill ewyllys dda goodwills ewyllys dda googly gwgli goose pimples croen gŵydd gooseberries eirin Mair gooseneck mynwydd gooseneck mynwyddu goosenecks mynwydd gore gôr gored skirt sgert gôr gored skirts sgert gôr gores gôr gorge ceunant gorges ceunant gospel efengyl gospels efengyl gouache gouache gouaches gouache gouge cafnu gouge gaing gau gouge cut toriad gaing gau gouge cuts toriad gaing gau gouged out lake llyn cafnog gouged out lakes llyn cafnog gouges gaing gau govern llywodraethu governance trefn lywodraethol governances trefn lywodraethol governing body corff llywodraethol government llywodraeth government by decree llywodraeth drwy ordinhad government of Wales llywodraeth Cymru government ombudsman ombwdsmon llywodraeth government ombudsmans ombwdsmon llywodraeth government spending gwariant llywodraeth government spendings gwariant llywodraeth government training centre canolfan hyfforddi'r llywodraeth government training centres canolfan hyfforddi'r llywodraeth governments llywodraeth governor llywodraethwr governors llywodraethwr governorship swydd llywodraethwr governorships swydd llywodraethwr graben dyffryn hollt (=rift valley) grabens dyffryn hollt (=rift valley) grace gras grace note addurnod grace notes addurnod graceful degradation diraddiad gosgeiddig graceful degradations diraddiad gosgeiddig graces gras gradation graddiad gradation of accents graddiad acenion gradation of contraction graddio cyfangiad gradation of dissonance graddoliad anghyseinedd gradation of volume graddiad sain gradations graddiad grade gradd grade graddio (=arrange in grades, sort) grade graddoli (=pass gradually between grades, blend) grade description disgrifiad graddau grade descriptions disgrifiad graddau grade of pencil gradd o bensil grade review adolygu graddau grade-related criterion maen prawf gradd berthynol grade-related criterions maen prawf gradd berthynol graded graddedig graded profile proffil graddedig graded profiles proffil graddedig graded test prawf graddedig graded tests prawf graddedig graded word reading test prawf graddedig darllen geiriau graded word reading tests prawf graddedig darllen geiriau grades gradd gradient graddiant gradients graddiant gradients of graphs graddiannau graffiau grading test prawf graddio grading tests prawf graddio gradual graddol gradual graddolen (in church service) graduals graddolen (in church service) graduate graddio graduate person graddedig graduate teacher athrawes raddedig (female) graduate teacher athro graddedig (male) graduate teachers athrawes raddedig (female) graduate teachers athro graddedig (male) graduated graddedig (in general) graduated graddnodedig (of thermometer) graduated flask fflasg raddedig graduated flasks fflasg raddedig graduated pension pensiwn graddedig graduated pensions pensiwn graddedig graduates person graddedig graduation graddnod (of thermometer) graduation ceremony seremoni graddio graduations graddnod (of thermometer) graffito graffito graft impiad graft impio graft hybrid croesryw impiedig graft hybrids croesryw impiedig grafted shoot cyffyn impiedig grafted shoots cyffyn impiedig grafts impiad grain graen (in rock,wood, cloth) grain grawn (food crop) grain gronyn (=particle) grain direction cyfeiriad y graen grain directions cyfeiriad y graen grain markings marciau graen graining graenio graining comb crib graenio graining combs crib graenio grains graen (in rock,wood, cloth) grains grawn (food crop) grains gronyn (=particle) grainy surface arwyneb graenog grainy surfaces arwyneb graenog gram gram grammar school ysgol ramadeg grammar schools ysgol ramadeg gramophone gramoffon gramophones gramoffon grams gram granal granaidd granary granar granary bread bara brown garw granary breads bara brown garw granary flour blawd brown garw granary flours blawd brown garw grand barré grand barré (of the guitar) grand barrés grand barré (of the guitar) grand canonical ensemble ensemble canonaidd mawreddog grand canonical ensembles ensemble canonaidd mawreddog grand duke archddug grand dukes archddug grand inquisitor uchel chwilyswr grand inquisitors uchel chwilyswr grand larceny lladrad mawr grand master uchel feistr grand masters uchel feistr grand opera opera fawreddog grand operas opera fawreddog grand period of growth prif gyfnod tyfiant grand piano piano traws grand prince uchel dywysog grand princes uchel dywysog granddaughter wyres granddaughters wyres grandfather tad-cu grandfather tape nain-dâp grandfather tapes nain-dâp grandfather-father-son principle egwyddor-nain-mam-merch grandfather-father-son principles egwyddor-nain-mam-merch grandfathers tad-cu grandmother mam-gu grandmothers mam-gu grandson ŵyr grandsons ŵyr grange maenor granges maenor granite gwenithfaen granites gwenithfaen grant grant grant maintained school ysgol a gynhelir â grant grant maintained schools ysgol a gynhelir â grant grant sanctuary rhoi noddfa grants grant granular gronynnog granulated gronynnog granulation gronyniad granulation tissue meinwe ronynnog granulation tissues meinwe ronynnog granulations gronyniad granule gronigyn granules gronigyn granulocyte granwlocyt granulocytes granwlocyt granum granwm granums granwm grapefruit grawnffrwyth grapefruits grawnffrwyth graph graff graph paper papur graff graph papers papur graff graph plotter plotydd graff graph plotters plotydd graff graphic graffig graphic art celfyddyd graffig graphic arts celfyddyd graffig graphic design dylunio graffig graphic designer dylunydd graffig graphic designers dylunydd graffig graphic image delwedd graffig graphic images delwedd graffig graphic notation nodiant graffig graphic notations nodiant graffig graphic score sgôr graffig graphic scores sgôr graffig graphical graffigol graphical differentiation differiad graffigol graphical differentiations differiad graffigol graphical display unit uned arddangos graffigol (GDU) graphical display units uned arddangos graffigol (GDU) graphical integration integriad graffigol graphical integrations integriad graffigol graphical technique techneg graffigol graphical techniques techneg graffigol graphical user interface rhyngwyneb defnyddiwr graffigol graphical user interfaces rhyngwyneb defnyddiwr graffigol graphics graffeg (in general) graphics graffigwaith (=graphical work) graphics pad pad graffeg graphics pads pad graffeg graphics tablet llechen graffeg graphics tablets llechen graffeg graphics terminal terfynell graffeg graphics terminals terfynell graffeg graphite graffit graphites graffit graphs graff graptolite graptolit graptolites graptolit grasp gafael grasps gafael grass gwair grass green gwyrdd porfa (enamelling colour) grass greens gwyrdd porfa (enamelling colour) grassland glaswelltir grasslands glaswelltir grated crayon creon mâl grated crayons creon mâl graticule graticiwl (in optical instruments) graticule rhwyll map (on maps) graticule intersection llinellau rhwyllog yn croesi graticules graticiwl (in optical instruments) graticules rhwyll map (on maps) grating gratin gratings gratin grave bedd grave goods nwyddau claddu gravel graean gravel graeanu gravelly graeanog gravels graean graver crafell gravers crafell graves bedd graveyard mynwent graveyards mynwent gravimetric result canlyniad grafimetrig gravimetric results canlyniad grafimetrig gravitate disgyrchu gravitation disgyrchedd gravitational disgyrchol gravitational attraction atyniad disgyrchiant gravitational attractions atyniad disgyrchiant gravitational equipotential surface arwyneb unbotensial disgyrchiant gravitational equipotential surfaces arwyneb unbotensial disgyrchiant gravitational field maes disgyrchiant gravitational field line llinell faes disgyrchiant gravitational field lines llinell faes disgyrchiant gravitational fields maes disgyrchiant gravitational force grym disgyrchiant gravitational forces grym disgyrchiant gravitational potential potensial disgyrchiant gravitational potential difference gwahaniaeth potensial disgyrchiant gravitational potential differences gwahaniaeth potensial disgyrchiant gravitational potentials potensial disgyrchiant gravitational pull tynfa disgyrchiant gravitational pulls tynfa disgyrchiant gravitational slumping cylchlithriad disgyrchiant gravitational slumpings cylchlithriad disgyrchiant gravitational unit uned disgyrchiant gravitational units uned disgyrchiant gravitations disgyrchedd gravity disgyrchiant gravity flow llif disgyrchiant gravity flows llif disgyrchiant gravity moulding moldio disgyrchol gravity pull tynfa disgyrchiant gravity pulls tynfa disgyrchiant gravity slope llethr disgyrchiant gravity slopes llethr disgyrchiant graze clwyf crafiad (of wound) graze crafiad (=scrape) graze crafu (=scrape) graze pori (=feed on grass) grazes clwyf crafiad (of wound) grazes crafiad (=scrape) grazier porfäwr graziers porfäwr grazing incidence prin drawiad (in physics) grazing incidences prin drawiad (in physics) grazing land tir pori grazing lands tir pori grease iro grease saim grease box blwch saim grease boxes blwch saim grease gun gwn saim grease guns gwn saim grease solvent hydoddydd saim grease solvents hydoddydd saim greases saim greasy seimlyd great circle cylch mawr great circles cylch mawr great organ prif organ great organs prif organ great white shark siarc mawr gwyn great white sharks siarc mawr gwyn great-grandchild gorwyr great-grandchilds gorwyr greatest common divisor rhannydd cyffredin mwyaf (=highest common factor) greatest common divisors rhannydd cyffredin mwyaf (=highest common factor) greave coesarf greaves coesarf green belt llain las green belt site safle tir glas green belt sites safle tir glas green belts llain las green field tir glas (in planning etc) green field site safle tir glas green field sites safle tir glas green fields tir glas (in planning etc) green sand tywod llaith green sand mould mowld tywod llaith green sand moulding mowldio tywod llaith green sand moulds mowld tywod llaith green sands tywod llaith green sward glastir green swards glastir green timber pren heb ei sychu (unseasoned) green timbers pren heb ei sychu (unseasoned) green ware crochenwaith heb ei danio green wares crochenwaith heb ei danio greengrocer gwerthwr llysiau (person) greengrocer siop lysiau (shop) greengrocers gwerthwr llysiau (person) greengrocers siop lysiau (shop) greenhouse tŷ gwydr greenhouse effect effaith tŷ gwydr greenhouse effects effaith tŷ gwydr greenhouses tŷ gwydr greens gwyrddion (=environmentalists) greensand tywodfaen gwyrdd greensands tywodfaen gwyrdd greeting card cerdyn cyfarch greeting cards cerdyn cyfarch gregarious cymdeithasgar (of people) gregarious heidiol (of animals) gregariousness cymdeithasgarwch (of people) gregariousness heidioledd (of animals) grenade grenâd grenades grenâd grey llwyd (enamelling colour) grey tywyllu (=darken) grey area ardal lwyd grey areas ardal lwyd grey board bwrdd llwyd grey boards bwrdd llwyd grey cardboard cardbord llwyd grey cardboards cardbord llwyd grey cast iron haearn bwrw llwyd grey cast irons haearn bwrw llwyd grey dune twyn llwyd grey dunes twyn llwyd grey iron haearn llwyd grey irons haearn llwyd grey matter breithell (brain) grey matters breithell (brain) grey modelling clay clai modelu llwyd grey powdered clay clai powdr llwyd grid grid grid bias bias grid grid north gogledd grid grid norths gogledd grid grid reference cyfeirnod grid grid references cyfeirnod grid grid resistor gwrthydd grid grid resistors gwrthydd grid grid system system grid grid systems system grid grid work gwaith grid grid works gwaith grid gridiron sgwarog grids grid grief galar grief reaction adwaith galar grief reactions adwaith galar griefs galar grievance cwyn grievance procedure dull gweithredu cwynion grievance procedures dull gweithredu cwynion grievances cwyn grieving process proses o alaru grike greic grikes greic grill gridyll grille dellt awyru (ventilation) grille gril (of car) grilled chop golwyth o'r gridyll grilled chops golwyth o'r gridyll grilles dellt awyru (ventilation) grilles gril (of car) grills gridyll grimace tynnu wyneb grimace ystum grimaces ystum grind llifanu (=reduce, sharpen or smooth) grind malu (=crush) grind in a mortar malu mewn morter grinder llifanydd grinders llifanydd grinding angle ongl lifanu grinding angles ongl lifanu grinding bevel befel llifanu grinding bevels befel llifanu grinding machine peiriant llifanu grinding machines peiriant llifanu grinding paste past llifanu grinding pastes past llifanu grinding wheel olwyn lifanu grinding wheels olwyn lifanu grindstone maen llifanu grindstone truer cywirwr maen llifanu grindstone truers cywirwr maen llifanu grindstones maen llifanu grip gafael grips gafael grit grut gritaceous grutiog grits grut gritstone carreg grut gritstones carreg grut gritty grutiog groan griddfan groan ochenaid groans ochenaid grocer groser grocers groser grog grog grogs grog groin cesail y forddwyd groins cesail y forddwyd grommet gromed grommets gromed groove rhigol groove punch pwnsh sêm groove punch seaming tool erfyn semio rhigol groove punch seaming tools erfyn semio rhigol groove punches pwnsh sêm grooved rhigolog grooved frame ffrâm rigolog grooved frames ffrâm rigolog grooved nut nyten rigolog grooved nuts nyten rigolog grooved panel panel rhigolog grooved panels panel rhigolog grooved seam sêm rigolog grooved seams sêm rigolog grooved stile cledren rigolog grooved stiles cledren rigolog groover rhigolydd groovers rhigolydd grooves rhigol grooving rhigoli grooving plane plaen rhigoli grooving planes plaen rhigoli grosgrain sidan rib (of silk) grosgrains sidan rib (of silk) gross crynswth (of income etc) gross deuddeg dwsin (=144) gross box office takings crynswth arian am docynnau gross capital cyfalaf crynswth gross capitals cyfalaf crynswth gross income incwm crynswth gross incomes incwm crynswth gross investment buddsoddiad gros gross investments buddsoddiad gros gross loss colled grynswth gross manipulative skills sgiliau llawdrin bras gross motor skills sgiliau echddygol bras gross pay cyflog crynswth gross product lluoswm crynswth gross products lluoswm crynswth gross profit elw crynswth gross profits elw crynswth grotesque grotesg grotto groto ground grwnd (in art) ground almonds almonau mâl ground bass grwndfas ground coat araen grwnd ground coats araen grwnd ground coffee coffi mâl ground coffees coffi mâl ground floor llawr gwaelod ground floors llawr gwaelod ground moraine marian llusg ground moraines marian llusg ground photograph ffotograff lefel y tir ground photographs ffotograff lefel y tir ground plan cynllun llawr ground plans cynllun llawr ground plate grwndblat ground plates grwndblat ground state cyflwr isaf ground states cyflwr isaf ground swell ymchwydd y don ground swells ymchwydd y don ground the ball turio'r bêl ground tissue meinwe daear ground tissues meinwe daear ground water dŵr daear (=phreatic water) ground waters dŵr daear (=phreatic water) ground-rent rhent safle ground-rents rhent safle grounds grwnd (in art) groundsman tirmon groundsmans tirmon groundsmanship tirmonaeth groundsmanships tirmonaeth groundwater dŵr daear groundwaters dŵr daear group cylch (in informal context) group grŵp (in formal context) group twr (=huddle) group activity gweithgaredd grŵp group activity session sesiwn gweithgaredd grŵp group activity sessions sesiwn gweithgaredd grŵp group dynamics dynameg grŵp group family teulu grŵp group interaction rhyngweithio grŵp group leader arweinydd grŵp group leaders arweinydd grŵp group of objects grŵp o wrthrychau group piece darn grŵp group pieces darn grŵp group test prawf grŵp group test of mental ability prawf grŵp o allu ymenyddol group tests prawf grŵp group therapy therapi grŵp grouping of notes cyfosod nodau grouping of rests cyfosod tawnodau groups cylch (in informal context) groups grŵp (in formal context) groups twr (=huddle) grouse grugiar grouses grugiar grout growt grout growtio grouts growt grove llwyn groves llwyn grow tyfu growing point tyfbwynt growing points tyfbwynt growing season tymor tyfu growing seasons tymor tyfu growth twf (act or process of) growth tyfiant (something grown / growing) growth and development twf a datblygiad growth curve cromlin dyfiant growth curves cromlin dyfiant growth cycle cylchred dyfiant growth cycles cylchred dyfiant growth formation ffurf tyfiant growth formations ffurf tyfiant growth hormone hormon twf growth hormones hormon twf growth industry diwydiant twf growth medium cyfrwng cynnal twf growth mediums cyfrwng cynnal twf growth rate cyfradd twf growth rates cyfradd twf growth response twf-ymateb growth responses twf-ymateb growth ring cylch tyfiant growth rings cylch tyfiant growths twf (act or process of) growths tyfiant (something grown / growing) groyne argor groynes argor grub bolt bollt ddigopa grub bolts bollt ddigopa grub-screw sgriw ddigopa grub-screws sgriw ddigopa grubber kick cic bwt grubber kicks cic bwt guanine gwanin guanines gwanin guano giwana guarantee gwarant guarantee gwarantu guaranteed goods nwyddau gwarantiedig guarantees gwarant guarantor gwarantwr guarantors gwarantwr guard gard (of person or device) guard gwarchod guard gwarchodlu (=body of troops) guard cell cell warchod guard cells cell warchod guard plate plât gwarchod guard plates plât gwarchod guard position safiad gwarchod guard positions safiad gwarchod guard rail rheilen warchod guard rails rheilen warchod guardian gwarcheidwad guardian angel angel gwarcheidiol guardian angels angel gwarcheidiol guardians gwarcheidwad guardianship gwarcheidwaeth guardianships gwarcheidwaeth guards gard (of person or device) guards gwarchodlu (=body of troops) guerrilla milwr gerila guerrilla warfare rhyfel gerila guerrilla warfares rhyfel gerila guerrillas milwr gerila guest gwestai guest house gwesty guest houses gwesty guest speaker siaradwr gwadd guest speakers siaradwr gwadd guests gwestai guidance arweiniad (=advice) guidance cyfarwyddyd (=instruction) guidances arweiniad (=advice) guidances cyfarwyddyd (=instruction) guide canllaw (=guideline) guide cyfeirydd (of instrument) guide llywio (behaviour etc) guide tywys (in general) guide tywysydd (of person) guide book arweinlyfr guide books arweinlyfr guide line tywyslinell (of diagram) guide lines tywyslinell (of diagram) guide pin pìn arwain guide pins pìn arwain guide plate plât tywys guide plates plât tywys guide screw sgriw gyfeirio guide screws sgriw gyfeirio guideline canllaw guidelines canllaw guidelines of good practice canllawiau ymarfer da guides canllaw (=guideline) guides cyfeirydd (of instrument) guides tywysydd (of person) guild gild (historical, ecological) guild urdd (in association titles etc) guildhall neuadd y dref guildhalls neuadd y dref guilds gild (historical, ecological) guilds urdd (in association titles etc) guillemot gwylog guillemots gwylog guillotine gilotîn guillotine shears gwellaif gilotîn guillotines gilotîn guilt euogrwydd guilts euogrwydd guitar gitâr guitarist gitarydd guitarists gitarydd guitars gitâr gulch ceunant gulches ceunant gulf gwlff gulfs gwlff gullet gwddf (of saw) gullet llwnc gullets gwddf (of saw) gullets llwnc gullied gylïog gully gyli gum deintgig (holding teeth) gum gwm (=glue) gum gymio gum arabic gwm arabig gum arabics gwm arabig gum eraser dilëwr gwm gum erasers dilëwr gwm gum paper papur gwm gum papers papur gwm gum shield tarian geg gum shields tarian geg gummed gymedig gummed binding rhwymyn gwm gummed bindings rhwymyn gwm gummed tape tâp glud gummed tapes tâp glud gun gwn gunmetal gwnfetel gunmetals gwnfetel gunpowder powdr gwn gunpowders powdr gwn gunshot wound clwyf ergyd gwn gunshot wounds clwyf ergyd gwn gunwale gynwal gunwales gynwal gurmukhi gurmukhi gurmukhis gurmukhi guru gwrw (general usage) gurus gwrw (general usage) gush out ffrydio gusset cwysed gussets cwysed gust hwrdd gustation blasu gustatory hair blewyn blasu gustatory hairs blewyn blasu gusts hwrdd gut coludd gut fret cribell goludd gut frets cribell goludd gut string tant coludd gut strings tant coludd guttate ymddafnu guttation ymddafniad guttations ymddafniad gutter cafn (on roof) gutter cwter (in street) gutters cafn (on roof) gutters cwter (in street) guyot mynydd guyot guyots mynydd guyot gybe starn ogam gybe starn ogamu gybes starn ogam gymnasium campfa gymnasiums campfa gymnast gymnastwr gymnastic action gweithred gymnastig gymnastic actions gweithred gymnastig gymnastic activity gweithgaredd gymnastig gymnastics gymnasteg gymnasts gymnastwr gymnosperm gymnosberm gymnosperms gymnosberm gymnospore gymnosbor gymnospores gymnosbor gynaecium gynaeciwm gynaeciums gynaeciwm gynaecologist gynaecolegydd gynaecologists gynaecolegydd gynaecology gynaecoleg gynoecium gynoeciwm gynoeciums gynoeciwm gypsum gypswm gypsum plaster plastr gypswm gypsum plasters plastr gypswm gypsums gypswm gypsy sipsi gyration chwyrliant gyrations chwyrliant gyre cylchgerrynt gyres cylchgerrynt gyro compass cwmpawd gyro gyroscope gyrosgop gyroscopes gyrosgop haberdashery manion gwnïo habit abid (=dress) habit arfer (=custom) habitable trigiadwy habitat cynefin habitation annedd habitations annedd habitats cynefin habits abid (=dress) habits arfer (=custom) habitual abortion erthylu cyson hack hacio hacksaw haclif hacksaw blade llafn haclif hacksaw blades llafn haclif hacksaw frame ffrâm haclif hacksaw frames ffrâm haclif hacksaws haclif haematite haematit haematite iron haearn haematit haematite irons haearn haematit haematites haematit haematitic haematitig haematologist haematolegydd haematologists haematolegydd haematology haematoleg haematuria haematwria haematurias haematwria haemocoel ceudod gwaed haemocoels ceudod gwaed haemocyanin haemocyanin haemocyanins haemocyanin haemocytometer haemocytomedr haemocytometers haemocytomedr haemoglobin haemoglobin haemoglobins haemoglobin haemolysis haemolysis haemophilia haemoffilia haemophilias haemoffilia haemoptysis gwaedboer haemorrhage gwaedlif haemorrhages gwaedlif haff morlyn haffs morlyn hafnium haffniwm (Hf) hafniums haffniwm (Hf) hagiography buchedd sant hair blewyn (on body) hair gwallt (on head) hair canvas cynfas rhawn hair cell cell flewyn hair cells cell flewyn hair follicle ffoligl blewyn hair follicles ffoligl blewyn hair shirt rhawnbais hair shirts rhawnbais hairdryer sychwr gwallt hairdryers sychwr gwallt hairs blewyn (on body) halberd gwayw fwyell halberds gwayw fwyell half hanner half arch hanner bwa half arches hanner bwa half cell hanner cell half cells hanner cell half centre hanner canol half centres hanner canol half close diweddeb amherffaith half closes diweddeb amherffaith half court line llinell hanner cwrt half court lines llinell hanner cwrt half knees bend gliniau'n blyg i'r hanner half moon hanner lleuad half moon chisel cŷn hanner crwn half moon chisels cŷn hanner crwn half moon stake bonyn hanner crwn half moon stakes bonyn hanner crwn half moons hanner lleuad half rotary-cut veneer argaen toriad hanner cylchdro half rotary-cut veneers argaen toriad hanner cylchdro half round hanner crwn half round chisel cŷn hanner crwn half round chisels cŷn hanner crwn half round file ffeil hanner crwn half round files ffeil hanner crwn half round moulding mowldin hanner crwn half round mouldings mowldin hanner crwn half round rasp rhathell hanner crwn half round rasps rhathell hanner crwn half round scraper sgrafell hanner crwn half round scrapers sgrafell hanner crwn half rounds hanner crwn half section hanner trychiad half sections hanner trychiad half size hanner maint llawn half sizes hanner maint llawn half time hanner amser half times hanner amser half turn hanner tro half turns hanner tro half value period cyfnod hanner actifedd half value periods cyfnod hanner actifedd half-adder hanner adydd half-adders hanner adydd half-back hanerwr (male) half-back hanerwraig (female) half-backs hanerwr (male) half-backs hanerwraig (female) half-bound hanner rhwym half-day hanner diwrnod half-drop pattern patrwm hanner disgyn half-drop patterns patrwm hanner disgyn half-duplex hanner dwplecs half-duplexes hanner dwplecs half-kneeling penlinio un glin half-lap joint goruniad hanerog half-lap joints goruniad hanerog half-length hanner hyd half-length portrait portread hanner hyd half-length portraits portread hanner hyd half-lengths hanner hyd half-life hanner oes half-lifes hanner oes half-mask hanner masg half-masks hanner masg half-recessed join uniad hanner cilannog half-recessed joins uniad hanner cilannog half-ripping hanner rhwygo half-sectional hanner trychiadol half-sectional elevation golwg hanner trychiadol half-sectional elevations golwg hanner trychiadol half-sectional end elevation ochrolwg hanner trychiadol half-sectional end elevations ochrolwg hanner trychiadol half-sectional front elevation blaenolwg hanner trychiadol half-sectional front elevations blaenolwg hanner trychiadol half-sectional plan uwcholwg hanner trychiadol half-sectional plans uwcholwg hanner trychiadol half-sectional side elevation ochrolwg hanner trychiadol half-sectional side elevations ochrolwg hanner trychiadol half-sectional view golwg hanner trychiadol half-sectional views golwg hanner trychiadol half-space key bysell hanner bwlch half-term hanner tymor half-terms hanner tymor half-timber trawst bras wedi'i haneru half-timbers trawst bras wedi'i haneru half-tone hanner tôn half-tones hanner tôn half-volley hanner foli half-wave hanner ton half-wave rectified power supply cyflenwad pŵer gydag unioniad hanner ton half-wave rectifier meter mesurydd unioni hanner ton half-wave rectifier meters mesurydd unioni hanner ton half-waves hanner ton halfs hanner halfway line llinell hanner halfway lines llinell hanner halide halid halides halid halitosis halitosis hall mark nod gwarant hall marks nod gwarant hallmote halmwd hallmotes halmwd hallucinate gweld rhithiau hallucination rhithweledigaeth hallucinations rhithweledigaeth halo eurgylch (of saint) halo lleugylch (of moon) halogen halogen halogenated halogenaidd halogenation halogeniad halogenations halogeniad halogeno-compound cyfansoddyn halogenaidd halogeno-compounds cyfansoddyn halogenaidd halogenoalkane halogenoalcan halogenoalkanes halogenoalcan halogens halogen halophobe haloffob halophobes haloffob halophyte haloffyt halophytes haloffyt halophytic haloffytig halt atal halt ataliad halter neck gwddf tennyn halter necks gwddf tennyn halter top top tennyn halter tops top tennyn halts ataliad halve haneru halving joint uniad haneru halving joints uniad haneru hamlet pentrefan hamlets pentrefan hammer morthwyl hammer morthwylio hammer beam trawst gordd hammer beam roof to trawst gordd hammer beam roofs to trawst gordd hammer beams trawst gordd hammer drill dril morthwyl hammer drills dril morthwyl hammer handle coes morthwyl hammer handles coes morthwyl hammer mark marc morthwyl hammer marks marc morthwyl hammer part rhan morthwyl hammer parts rhan morthwyl hammer stone carreg forthwylio hammer stones carreg forthwylio hammer-head tenon tyno pen morthwyl hammer-head tenons tyno pen morthwyl hammers morthwyl hand llaw hand axe bwyell law hand axes bwyell law hand ball pêl law hand balls pêl law hand basin basn ymolchi hand basins basn ymolchi hand cards cardiau gwlân hand drawn lettering llythrennu â llaw hand drill dril llaw hand drills dril llaw hand embroidery brodwaith llaw hand file ffeil law hand files ffeil law hand flat file ffeil law fflat hand flat files ffeil law fflat hand hot gwres llaw (water) hand jam clo llaw hand jams clo llaw hand lens chwyddwydr hand loom gwŷdd llaw hand looms gwŷdd llaw hand machine peiriant llaw hand machines peiriant llaw hand made o waith llaw hand made buttonhole twll botwm llaw hand made buttonholes twll botwm llaw hand off hwp llaw hand offs hwp llaw hand organ organ law hand organs organ law hand painting paentiad llaw (of painted picture) hand painting peintio llaw (of process or art) hand paintings paentiad llaw (of painted picture) hand puppet pyped llaw hand puppets pyped llaw hand rail canllaw hand rails canllaw hand reamer agorell law hand reamers agorell law hand saw llawlif hand saws llawlif hand scraper sgrafell law hand scrapers sgrafell law hand screw sgriw law hand screws sgriw law hand sketch braslun llaw hand sketches braslun llaw hand taper tapr llaw hand tapers tapr llaw hand tools offer llaw hand vice feis law hand vices feis law hand walking llaw gerdded hand washable golchadwy â llaw hand wrench tyndro llaw hand wrenches tyndro llaw hand-breadth dyrnfedd (=4 inches) hand-breadths dyrnfedd (=4 inches) hand-eye coordination cydsymud llaw a llygad hand-held cup anemometer anemomedr llaw hand-held cup anemometers anemomedr llaw hand-in serfiwr (=server) hand-ins serfiwr (=server) hand-operated gweithredu â llaw hand-out dalen hysbysebu hand-outs dalen hysbysebu hand-shaking ysgwyd llaw handbag bag llaw handbags bag llaw handbill hysbyslen fach handbills hysbyslen fach handbook llawlyfr handbooks llawlyfr handicap anfantais handicapped child plentyn dan anfantais handicapped childs plentyn dan anfantais handicaps anfantais handicraft gwaith llaw handicrafts gwaith llaw handkerchief hances handkerchiefs hances handle carn (of knife, screwdriver etc) handle coes (of bat, brush, hammer, saucepan etc) handle dolen (of jug, cup etc) handle trafod (data, goods, ball etc) handle cane gwialen ddolen handle canes gwialen ddolen handle head pen coes handle heads pen coes handle the ball llawio'r bêl (when it's an offence) handles carn (of knife, screwdriver etc) handles coes (of bat, brush, hammer, saucepan etc) handles dolen (of jug, cup etc) handling llawio (of ball in sport) handling triniaeth (=treatment) handling ymdriniaeth (=discussion) handlings triniaeth (=treatment) handlings ymdriniaeth (=discussion) handlist llawrestr handlists llawrestr handout taflen handouts taflen hands llaw hands across seren (in dancing) hands four cylch pedwar hands fours cylch pedwar hands three cylch tri pedwar hands threes cylch tri pedwar hands! llaw! (in sport) hands-on ymarferol handset set law handsets set law handsign arwydd llaw (for pitch) handsigns arwydd llaw (for pitch) handspring sbring llaw handsprings sbring llaw handstand llawsafiad handstand llawsefyll handstands llawsafiad handwork gwaith llaw handworks gwaith llaw handwriting llawysgrifen handwritings llawysgrifen hang crogi (a person etc) hang hongian hanger cambren (for hanging clothes) hanger hongiwr (of tapestry etc) hangers cambren (for hanging clothes) hangers hongiwr (of tapestry etc) hanging crog hanging bowl powlen grog hanging bowls powlen grog hanging carcass sgerbwd crog hanging end pen crog hanging ends pen crog hanging garden gardd grog hanging gardens gardd grog hanging indent mewnoliad crog hanging indents mewnoliad crog hanging loop dolen grog hanging loops dolen grog hanging paragraph paragraff crog hanging paragraphs paragraff crog hanging stile cledren hongian hanging stiles cledren hongian hanging valley crognant hanging wall crogfur hanging walls crogfur hank twysgen hanks twysgen haploid haploid haploidy haploidi harbour harbwr harbours harbwr hard caled hard copy copi caled hard cover clawr caled hard covers clawr caled hard disk disg caled hard disks disg caled hard flooring llawr caled hard floorings llawr caled hard landscaping tirlunio caled hard news newyddion caled hard return dychweliad caled hard returns dychweliad caled hard rock craig galed hard rocks craig galed hard sectored sectoriad caled hard sectoreds sectoriad caled hard silver solder sodr arian caled hard silver solders sodr arian caled hard soap sebon caled hard soaps sebon caled hard solder sodr caled hard solders sodr caled hard water dŵr caled hard waters dŵr caled hard wired gwifredig hardboard caledfwrdd hardboard plane plaen caledfwrdd hardboard planes plaen caledfwrdd hardboards caledfwrdd hardcore craidd caled hardcores craidd caled harden caledu hardener caledwr hardeners caledwr hardening and tempering caledu a thymheru hardening hammer morthwyl caledu hardening hammers morthwyl caledu hardening material defnydd caledu hardening materials defnydd caledu hardie cŷn eingion hardie hole twll offer hardie holes twll offer hardies cŷn eingion hardiest tree coeden wytnaf hardiest trees coeden wytnaf hardiness gwydnwch hardness caledwch hardness of water caledwch dŵr hardness scale graddfa galedwch hardness scales graddfa galedwch hardness test prawf caledwch hardness tests prawf caledwch hardpan cletir hardpans cletir hardware caledwedd (of computers) hardware shop siop nwyddau metel hardware shops siop nwyddau metel hardwares caledwedd (of computers) hardwearing yn gwisgo'n dda hardwood pren caled hardwood cell cell pren caled hardwood cells cell pren caled hardwood fillet ffiled pren caled hardwood fillets ffiled pren caled hardwood mallet gordd pren caled hardwood mallets gordd pren caled hardwood wedging lletemu pren caled hardwoods pren caled haricot beans ffa haricot harmattan harmatan harmattans harmatan harmful niweidiol harmful bacteria bacteria niweidiol harmonic harmonig harmonic chromatic scale graddfa gromatig harmonig harmonic chromatic scales graddfa gromatig harmonig harmonic colour lliw harmonig harmonic colours lliw harmonig harmonic interval cyfwng harmonig harmonic intervals cyfwng harmonig harmonic mean cymedr harmonig harmonic means cymedr harmonig harmonic minor scale graddfa leiaf harmonig harmonic minor scales graddfa leiaf harmonig harmonic motion mudiant harmonig harmonic motions mudiant harmonig harmonic movement rhediad harmonig harmonic movements rhediad harmonig harmonic proportion cyfrannedd harmonig harmonic proportions cyfrannedd harmonig harmonic sequence dilyniant harmonig harmonic sequences dilyniant harmonig harmonic series cyfres harmonig harmonica harmonica harmonicas harmonica harmonics harmonig harmonious cydseiniol harmonious colour lliw cydnaws harmonious colours lliw cydnaws harmonium harmoniwm harmonium player harmonydd harmonium players harmonydd harmoniums harmoniwm harmonize harmoneiddio harmony cytgord (figurative sense) harmony harmoni (in music) harp telyn harp stop stop telyn harp stops stop telyn harpist telynor (male) harpist telynores (female) harpists telynor (male) harpists telynores (female) harps telyn harpsichord harpsicord harpsichords harpsicord harvest cynhaeaf harvest moon lleuad fedi harvest moons lleuad fedi harvest service cyfarfod diolchgarwch harvest services cyfarfod diolchgarwch harvest thanksgiving diolch am y cynhaeaf harvests cynhaeaf hash stwnsh (in general) hash table tabl stwnsh hash tables tabl stwnsh hash total cyfanswm stwnsh hash totals cyfanswm stwnsh hashed random file organization trefn hap-ffeil stwnshlyd hashed random file organizations trefn hap-ffeil stwnshlyd hashing stwnsio hashing algorithm algorithm stwnsio hashing algorithms algorithm stwnsio hashs stwnsh (in general) hasp and staple hasb a stwffwl hatch agoriad gweini (for serving) hatch deor (of egg) hatch lliniogi (=mark with lines) hatchery deorfa hatches agoriad gweini (for serving) hatchet bwyell hatchet bit haearn sodro bwyell hatchet bits haearn sodro bwyell hatchet stake bonyn ongl lem hatchet stakes bonyn ongl lem hatchets bwyell hauberk llurig hauberks llurig haulage cludiant haulage contractor cludwr nwyddau haulage contractors cludwr nwyddau haulages cludiant haulier halier hauliers halier haunch hansio haunched mortise and tenon mortais a thyno hansiedig haunched mortise and tenon joint uniad mortais a thyno hansiedig haunched mortise and tenon joints uniad mortais a thyno hansiedig haunched tenon tyno hansiedig haunched tenons tyno hansiedig haustorium hawstoriwm haustoriums hawstoriwm haven hafan havens hafan hawking heboga hawthorn draenen wen hawthorns draenen wen hay infusion trwyth gwair hay infusions trwyth gwair haybote perthfudd haybotes perthfudd hayward caegeidwad haywards caegeidwad hazard perygl hazardous substance sylwedd peryglus hazardous substances sylwedd peryglus hazards perygl haze tawch (atmospheric pollution etc) hazes tawch (atmospheric pollution etc) head pen (in general) head wynebyn (in geology) head boy prif fachgen head girl prif ferch head girls prif ferch head injury anaf i'r pen head motif motiff pen head motifs motiff pen head movement symudiad y pen head movements symudiad y pen head of department pennaeth adran head of faculty pennaeth cyfadran head of lower school pennaeth yr ysgol isaf head of middle school pennaeth yr ysgol ganol head of navigation terfyn mordwyo head of subject pennaeth pwnc head of upper school pennaeth yr ysgol uchaf head of year pennaeth blwyddyn head office prif swyddfa head offices prif swyddfa head register llais y pen head registers llais y pen head the ball penio'r bêl head voice llais y pen head voices llais y pen head wall recession enciliad cefnfur head wall recessions enciliad cefnfur head wear gwisg pen head wears gwisg pen head-on ben-ben headache cur pen headaches cur pen header peniad (of ball) header tape blaen-dâp header tapes blaen-dâp headers peniad (of ball) heading pennawd headings pennawd headland pentir headlands pentir headline pennawd headlines pennawd headmaster prifathro headmasters prifathro headmistress prifathrawes headphone ffôn pen headphones ffôn pen headquarters pencadlys heads pen (in general) heads wynebyn (in geology) headslide penlithryn headslides penlithryn headspring sbring pen headsprings sbring pen headstand pensafiad headstand pensefyll headstands pensafiad headstock pen byw (of lathe) headstock centre canol tro headstock centres canol tro headstocks pen byw (of lathe) headteacher pennaeth ysgol headteachers pennaeth ysgol headward erosion blaen erydu headwater blaenddwr headwaters blaenddwr headword prif air headwords prif air heal gwella health iechyd health and fitness officer swyddog iechyd a ffitrwydd health and fitness officers swyddog iechyd a ffitrwydd health and safety iechyd a diogelwch health and safety legislation deddfwriaeth iechyd a diogelwch health and safety legislations deddfwriaeth iechyd a diogelwch health and safety officer swyddog iechyd a diogelwch health and safety officers swyddog iechyd a diogelwch health and social care iechyd a gofal cymdeithasol health and social care setting sefyllfa iechyd a gofal cymdeithasol health and social care settings sefyllfa iechyd a gofal cymdeithasol health and social cares iechyd a gofal cymdeithasol health authority awdurdod iechyd health care assistant cynorthwyydd gofal iechyd health care assistants cynorthwyydd gofal iechyd health care provider darparwr gofal iechyd health care providers darparwr gofal iechyd health care purchaser prynwr gofal iechyd health care purchasers prynwr gofal iechyd health care support worker gweithiwr cynnal gofal iechyd health care support workers gweithiwr cynnal gofal iechyd health care system cyfundrefn gofal iechyd health care systems cyfundrefn gofal iechyd health centre canolfan iechyd health centres canolfan iechyd health club clwb iechyd health clubs clwb iechyd health education addysg iechyd health education authority awdurdod addysg iechyd health educations addysg iechyd health improvement gwella iechyd health improvement plan cynllun gwella iechyd health improvement plans cynllun gwella iechyd health index mynegai iechyd health indexes mynegai iechyd health maintenance cynnal iechyd health promotion hybu iechyd health promotion activity gweithgaredd hybu iechyd health promotion campaign ymgyrch hybu iechyd health promotion campaigns ymgyrch hybu iechyd health promotion material deunydd hybu iechyd health promotion materials deunydd hybu iechyd health risk perygl iechyd health risks perygl iechyd health screening sgrinio iechyd health service gwasanaeth iechyd health services gwasanaeth iechyd health status statws iechyd health team tîm iechyd health teams tîm iechyd health visitor ymwelydd iechyd health visitors ymwelydd iechyd health-related exercise ymarfer cysylltiedig ag iechyd health-related exercises ymarfer cysylltiedig ag iechyd healths iechyd healthy iach healthy diet deiet iachus healthy diets deiet iachus healthy lifestyle ffordd iach o fyw healthy lifestyles ffordd iach o fyw healthy plate plât o fwyd iachus healthy plates plât o fwyd iachus hearing clyw (=ability to hear) hearing gwrandawiad (of a case) hearing aid teclyn clywed hearing aids teclyn clywed hearing loss colli clyw hearings clyw (=ability to hear) hearings gwrandawiad (of a case) heart calon heart attack trawiad ar y galon heart attacks trawiad ar y galon heart disease clefyd y galon heart diseases clefyd y galon heart failure methiant y galon heart failures methiant y galon heart murmur murmur y galon heart murmurs murmur y galon heart rate cyfradd curiad y galon heart rate training zone cylchfa ymarfer cyfradd curiad y galon heart rate training zones cylchfa ymarfer cyfradd curiad y galon heart rates cyfradd curiad y galon heart shake hollt calon heart shakes hollt calon heart sounds synau'r galon heartbeat curiad calon heartbeats curiad calon hearth aelwyd hearth body corff yr aelwyd hearth tax treth aelwyd hearth taxes treth aelwyd hearth trowel trywel aelwyd hearth trowels trywel aelwyd hearths aelwyd heartland perfeddwlad heartlands perfeddwlad hearts calon heartwood rhuddin heartwoods rhuddin heat gwres (=condition of being hot) heat gwresogi heat rhagras (=preliminary race) heat and energy foods bwydydd gwres ac egni heat capacity cynhwysedd gwres heat haze tes heat hazes tes heat of combustion gwres hylosgi heat of formation gwres ffurfio heat of neutralisation gwres niwtralu heat of reaction gwres adweithio heat of vaporization gwres anweddu heat resistant gwrthiannol i wres heat sink suddfan gwres heat sinks suddfan gwres heat treatment triniaeth wres heat treatments triniaeth wres heat-resisting varnish farnais gwrth-wres heat-resisting varnishs farnais gwrth-wres heater gwresogydd heater circuit cylched wresogi heater circuits cylched wresogi heater current cerrynt gwresogi heater currents cerrynt gwresogi heaters gwresogydd heath rhos heathland rhostir heathlands rhostir heaths rhos heating element elfen wresogi heating elements elfen wresogi heats gwres (=condition of being hot) heats rhagras (=preliminary race) heatstroke trawiad gwres heatstrokes trawiad gwres heatwave ton wres heatwaves ton wres heave gwthiad (in geological fault) heave haliad (of rope) heave halio (a rope) heave ymgodi (on a bar) heave ymgodiad (on a bar) heave hanging hongian halio heave swing swing ymhalio heave swings swing ymhalio heaven nefoedd (in religious sense) heavenly body corff wybrennol heavens nefoedd (in religious sense) heavens wybren (=sky) heaves gwthiad (in geological fault) heaves haliad (of rope) heaves ymgodiad (on a bar) heavy trwm heavy colour lliw trwm heavy colours lliw trwm heavy damping gwanychiad trwm heavy dampings gwanychiad trwm heavy duty detergent glanedydd cryf heavy duty detergents glanedydd cryf heavy duty drilling machine peiriant drilio gwaith trwm heavy duty drilling machines peiriant drilio gwaith trwm heavy impasto impasto trwm heavy industry diwydiant trwm heavy metal metel trwm heavy metals metel trwm heavy oil olew trwchus heavy oils olew trwchus heavy water dŵr trwm heavy waters dŵr trwm heavy weight pwysau trwm hectare hectar hectares hectar heddle brwyd heddles brwyd hedge perth hedges perth hedonic calculus calcwlws hedonig hedonic relevance perthnasedd hedonig hedonic relevances perthnasedd hedonig heel sawdl heel sodli heel and toe step step sawdl a bawd heel and toe steps step sawdl a bawd heel clearance cliriad sawdl heel clearances cliriad sawdl heel of a bow sawdl bwa heel of glove sawdl y faneg heelball cwyr rhwbio heelballs cwyr rhwbio heels sawdl hegemony penarglwyddiaeth height taldra (of person) height uchder (=elevation) height / time graph graff uchder / amser height / time graphs graff uchder / amser height adjusting nut nyten gymhwyso uchder height adjusting nuts nyten gymhwyso uchder height gauge medrydd uchder height gauges medrydd uchder heights taldra (of person) heights uchder (=elevation) heights are to the nearest metre above mean sea level uchderau i'r metr agosaf uwchlaw lefel y môr cymedrig heir etifedd heir apparent edling heir apparents edling heir presumptive etifedd tebygol heir presumptives etifedd tebygol heirs etifedd helical heligol helical flute ffliwt heligol helical flutes ffliwt heligol helical path llwybr heligol helical paths llwybr heligol helical spring sbring heligol helical springs sbring heligol helical thread edau heligol helical threads edau heligol helicoid helicoid helicoidal helicoidol helicoids helicoid helicopter hofrennydd helicopters hofrennydd heliotropic heliotropig heliotropism heliotropedd heliotropisms heliotropedd heliport maes hofrenyddion heliports maes hofrenyddion helium heliwm (He) heliums heliwm (He) helix helics helix angle ongl helics helix angles ongl helics helix clearance cliriad helics helix clearances cliriad helics helixes helics hell uffern hells uffern helm roof to helm helm roofs to helm helmet helm helmets helm helmsman llywiwr helmsmans llywiwr help cymorth helplessness diymadferthedd helps cymorth hem hem hem hemio hem allowance lwfans hem hem allowances lwfans hem hem depth lled hem hem depths lled hem hem finish gorffeniad hem hem finishs gorffeniad hem hem line llinell hem hem lines llinell hem hem marker marciwr hem hem markers marciwr hem hem stitch pwyth hemio hem stitches pwyth hemio hem stitching hembwytho hemicellulose hemicellwlos hemicelluloses hemicellwlos hemiparesis lled-barlys un ochr hemiplegia parlys un ochr hemiplegias parlys un ochr hemisphere hemisffer hemispheres hemisffer hemispherical bowl bowlen hemisffer hemispherical bowls bowlen hemisffer hemispherical shell cragen hemisffer hemispherical shells cragen hemisffer hemmer hemell (machine attachment) hemmers hemell (machine attachment) hemp cywarch hemp twine cortyn cywarch hemp twines cortyn cywarch hemps cywarch henge cylch pridd henges cylch pridd henotheism henotheistiaeth henotheisms henotheistiaeth hepatic portal vein gwythïen bortal hepatig hepatic portal veins gwythïen bortal hepatig hepatic vein gwythïen hepatig hepatic veins gwythïen hepatig hepatitis hepatitis heptagon heptagon heptagonal heptagonal heptagons heptagon herald herodr heraldic herodrol heraldic banner lluman herodrol heraldic banners lluman herodrol heraldic bard arwyddfardd heraldic bards arwyddfardd heraldic colour lliw herodrol heraldic colours lliw herodrol heraldic lettering llythrennu herodrol heraldic purse pwrs herodrol heraldic purses pwrs herodrol heraldry herodraeth heralds herodr herb llysieuyn herbaceous llysieuol herbal llysieulyfr (book) herbals llysieulyfr (book) herbarium herbariwm herbariums herbariwm herbicide chwynladdwr herbicides chwynladdwr herbivore llysysydd herbivores llysysydd herbivorous llysysol herbs llysieuyn herd buches (of dairy cows) herd gyr (of cattle) herd immunity imiwnedd poblogaeth herds buches (of dairy cows) herds gyr (of cattle) hereditament etifeddiant hereditaments etifeddiant hereditary etifeddol hereditary fief ffiff etifeddol hereditary fiefs ffiff etifeddol hereditary monarchy brenhiniaeth etifeddol heredity etifeddeg heresy heresi heretic heretic heretical hereticaidd heretics heretic heriot ebediw heriots ebediw heritage etifeddiaeth heritages etifeddiaeth hermaphrodite deurywiad hermaphrodites deurywiad hermaphroditic deurywiol hermaphroditism deurywiaeth hermaphroditisms deurywiaeth hermetically sealed cwbl seliedig hermit meudwy hermitage cell meudwy hermitages cell meudwy hermits meudwy hero arwr heroic society cymdeithas arwrol herpes herpes herring bone strut cynheiliad saethben herring bone struts cynheiliad saethben herring-bone banding bandin saethben herring-bone bandings bandin saethben herring-bone pattern patrwm saethben herring-bone patterns patrwm saethben herring-bone stitch pwyth saethben herring-bone stitches pwyth saethben herring-bone weave gwehyddiad saethben herring-bone weaves gwehyddiad saethben hertz herts (Hz) hertzes herts (Hz) hessian hesian hessians hesian heterodyne heterodein heterodynes heterodein heterogametic heterogametaidd heterogeneity heterogenedd heterogeneous heterogenaidd heterolytic fission ymholltiad heterolytig heterolytic fissions ymholltiad heterolytig heterophony heteroffoni heterosexual heterorywiol heterosporous heterosboraidd heterospory heterosboredd heterostyly heterostyledd heterotroph heterotroff heterotrophs heterotroff heterozygous heterosygaidd heuristic hewristig heuristic play chwarae hewristig heuristic program rhaglen hewristig heuristic programs rhaglen hewristig heuristic proof prawf hewristig heuristic proofs prawf hewristig hex hecs hex digit digid hecs hex digits digid hecs hexacyanoferrate ion ïon hecsacyanofferad hexacyanoferrate ions ïon hecsacyanofferad hexadecimal hecsadegol hexadecimal counting system system rifo hecsadegol hexadecimal counting systems system rifo hecsadegol hexadecimal notation nodiant hecsadegol hexadecimal notations nodiant hecsadegol hexagon hecsagon hexagonal hecsagonol hexagonal close-packing pacio tyn hecsagonol hexagonal head bolt bollt ben hecsagonol hexagonal head bolts bollt ben hecsagonol hexagonal head screw sgriw ben hecsagonol hexagonal head screws sgriw ben hecsagonol hexagonal nut nyten hecsagonol hexagonal nuts nyten hecsagonol hexagonal prism prism hecsagonol hexagonal prisms prism hecsagonol hexagonal pyramid pyramid hecsagonol hexagonal pyramids pyramid hecsagonol hexagonal section material defnydd trychiad hecsagonol hexagonal section materials defnydd trychiad hecsagonol hexagons hecsagon hexahedron hecsahedron hexahedrons hecsahedron hexose hecsos hexoses hecsos hey hai hey between hai traws hey betweens hai traws hey with your own hai unrhyw hi-tech technoleg uwch hi-teches technoleg uwch hiatus bwlch hibernate gaeafgysgu hibernation gaeafgwsg hibernations gaeafgwsg hiccup igian hidden cudd hidden costs costau cudd hidden curriculum cwricwlwm cudd hidden curriculums cwricwlwm cudd hidden detail manylion cudd hidden detail line llinell manylion cudd hidden detail lines llinell manylion cudd hidden eighth wythfed cudd hidden eighths wythfed cudd hidden fifth pumed cudd hidden fifths pumed cudd hidden instrument offeryn cudd hidden instruments offeryn cudd hidden line llinell gudd hidden lines llinell gudd hide croen (=skin) hide cuddio hide mallet gordd ledr hide mallets gordd ledr hide picture cuddio llun hides croen (=skin) hierarchical hierarchaidd hierarchical database cronfa ddata hierarchaidd hierarchical databases cronfa ddata hierarchaidd hierarchical model model hierarchaidd hierarchical models model hierarchaidd hierarchical organisational structure fframwaith rheoli hierarchaidd hierarchical organisational structures fframwaith rheoli hierarchaidd hierarchy hierarchaeth hierarchy of needs hierarchaeth anghenion hierarchy of the courts hierarchaeth y llysoedd hieroglyphic writing ysgrifen hieroglyffig hieroglyphic writings ysgrifen hieroglyffig high uchel high Renaissance uchel Ddadeni high altar prif allor high altars prif allor high ball pêl uchel high balls pêl uchel high carbon steel dur carbon uchel high carbon steels dur carbon uchel high chair cadair uchel high clarinet uwchglarinét high clarinets uwchglarinét high class area ardal dosbarth uchaf high class areas ardal dosbarth uchaf high density building adeiladu clos high dive deifio'n uchel high fidelity cywair-bur high foaming detergent glanedydd llawndrochion high foaming detergents glanedydd llawndrochion high forward roll rhôl uchel ymlaen high forward rolls rhôl uchel ymlaen high frequency amledd uchel (of oscillations) high frequency induction furnace ffwrnais anwytho amledd uchel high frequency induction furnaces ffwrnais anwytho amledd uchel high jump naid uchel high jumps naid uchel high level lefel uchel high levels lefel uchel high limit terfan uchel high limits terfan uchel high line llinell uchel high lines llinell uchel high neck gwddf uchel high necks gwddf uchel high place uchelfa high places uchelfa high population density dwysedd poblogaeth uchel high pressure gwasgedd uchel high pressure system system gwasgedd uchel high pressure systems system gwasgedd uchel high pressures gwasgedd uchel high register nodau uchel high relief cerfwedd uchel (=alto relievo) high reliefs cerfwedd uchel (=alto relievo) high sales gwerthiant mawr high sea cefnfor high seas cefnfor high spin amlsbin high standard safon uchel high standards safon uchel high street bank banc stryd fawr high street banks banc stryd fawr high tensile uchel dynnol high tensile steel dur ucheldynnol high tensile steels dur ucheldynnol high tide llanw uchel high tides llanw uchel high treason uchel frad high treasons uchel frad high vacuum gwactod eithaf high vacuums gwactod eithaf high voltage foltedd uchel high voltages foltedd uchel high water penllanw high water mark marc penllanw high water marks marc penllanw high waters penllanw high-level language iaith lefel uchel high-level languages iaith lefel uchel high-level programming language iaith raglennu lefel uchaf high-level programming languages iaith raglennu lefel uchaf high-order uwch-werth high-speed bit ebill cyflym iawn high-speed bits ebill cyflym iawn high-speed drill dril cyflym iawn high-speed drills dril cyflym iawn highboard llwyfan uchel highboards llwyfan uchel higher uwch higher clergy uwch glerigwyr higher degree gradd uwch higher degrees gradd uwch higher education addysg uwch higher educations addysg uwch higher order polynomial equation uwch-hafaliad polynomaidd higher order polynomial equations uwch-hafaliad polynomaidd highest common factor ffactor gyffredin fwyaf highest common factors ffactor gyffredin fwyaf highest point pwynt uchaf highest points pwynt uchaf highland ucheldir highlands ucheldir highlight amlygu (=bring into prominence) highlight goleubwyntio (in art) highlight lliwddangos (=mark with a highlighter) highlight uchafbwynt highlight bar bar amlygu highlight bars bar amlygu highlighting goleubwyntio (in art) highlights uchafbwynt highly skilled tra medrus highly specialised tra arbenigol highway priffordd highwayman lleidr pen-ffordd highwaymans lleidr pen-ffordd hijack herwgipio hill bryn hill country bryndir hill fog niwl mynydd hill fogs niwl mynydd hill fort bryngaer hill forts bryngaer hill shading arlliwio llethrau hill station brynfa hill stations brynfa hillock bryncyn hillocks bryncyn hills bryn hilly bryniog hilt carn hilts carn hilum hadgraith hilums hadgraith hind brain ôl-ymennydd hind brains ôl-ymennydd hind gut ôl-berfeddyn hind guts ôl-berfeddyn hind leg coes ôl hind legs coes ôl hind-milk armel hind-milks armel hinge colfach hinge colfachu hinge bracket braced colfach hinge brackets braced colfach hinge knuckle cymal colfach hinge knuckles cymal colfach hinge leaf dalen golfach hinge leafs dalen golfach hinge pin pìn colfach hinge pins pìn colfach hinge-bound clofach-glwm hinged colfachog hinged arm braich golfachog hinged arms braich golfachog hinges colfach hinterland cefnwlad hinterlands cefnwlad hip clun hip carry cario wrth glun hip joint cymal y glun hip joints cymal y glun hip line llinell glun hip lines llinell glun hip measurement mesuriad clun hip measurements mesuriad clun hip rafter ceibr talcen hip rafters ceibr talcen hip roof talcendo hip roof rafter cwpl talcen hip roof rafters cwpl talcen hip roofs talcendo hire llogi hire-purchase hurbwrcas hire-purchase hurbwrcasu hire-purchases hurbwrcas hirsute blewog histidine histidin histidines histidin histogram histogram histograms histogram histology histoleg histone histon histones histon histopathology histopatholeg historian hanesydd historians hanesydd historical hanesyddol historical data data hanesyddol historical feature nodwedd hanesyddol historical features nodwedd hanesyddol historical method dull yr hanesydd historical methods dull yr hanesydd historical period cyfnod hanesyddol historical periods cyfnod hanesyddol historical perspective persbectif hanesyddol historical perspectives persbectif hanesyddol historical source ffynhonnell hanesyddol historical sources ffynhonnell hanesyddol historical theme thema hanesyddol historical themes thema hanesyddol historical topic topig hanesyddol historical topics topig hanesyddol historicism hanesiaeth historicisms hanesiaeth historicity hanesoldeb historiographer hanesydd (=historian) historiographer hanesyddiaethwr (=authority on historiography) historiographers hanesydd (=historian) historiographers hanesyddiaethwr (=authority on historiography) historiography hanesyddiaeth history hanes hit ergyd (=a stroke with a bat) hit ergydio (=strike with a bat) hit taro (=reach a target) hit trawiad (in general) hit a boundary taro chwech (for six runs) hit a boundary taro pedwar (for four runs) hit back taro nôl hit back trawiad nôl hit backs trawiad nôl hit for six taro chwech hit rate cyfradd taro hit rates cyfradd taro hit the ball twice taro'r bêl eilwaith hit the target taro'r targed hit wicket taro'r wiced hit-out ergyd ochr hit-outs ergyd ochr hitch clymu hoar frost barrug hoar frosts barrug hoard celc hoarding oriel bren (castle) hoardings oriel bren (castle) hoards celc hob pentan hobby hobi hockey hoci hodograph hodograff hodographs hodograff hogback hopgefn hogbacks hopgefn hoghair brush brwsh blew mochyn hoghair brushs brwsh blew mochyn hoist codi hoist teclyn codi hoists teclyn codi hold charges cadw'r un prisiau mynediad holder daliwr holders daliwr holdfast dalbren (=clamp) holdfast gludafael (of algae) holdfasts dalbren (=clamp) holdfasts gludafael (of algae) holding daliad (of land, shares etc) holding device dyfais ddal holding devices dyfais ddal holding hands cydio dwylo holding power pwerddaliad (nails and screws) holding powers pwerddaliad (nails and screws) holding tools offer gafael holding washer wasier gynnal holding washers wasier gynnal holdings daliad (of land, shares etc) hole twll hole in the heart twll yn y galon hole saw llif dwll hole saws llif dwll holes twll holiday brochure taflen wyliau holiday brochures taflen wyliau holiday camp gwersyll gwyliau holiday camps gwersyll gwyliau holiday centre canolfan wyliau holiday centres canolfan wyliau holiday insurance yswiriant gwyliau holiday insurances yswiriant gwyliau holiday village pentref gwyliau holiday villages pentref gwyliau holidays gwyliau holistic cyfannol holistic model model cyfannol holistic models model cyfannol hollow cafnu hollow gwag hollow pant hollow pantio hollow back somersault trosben ceugefn hollow back somersaults trosben ceugefn hollow bit tongs gefel gegron hollow head pen cau hollow heads pen cau hollow mandrel mandrel cau (lathe) hollow mandrels mandrel cau (lathe) hollow moulding mowldin cau hollow mouldings mowldin cau hollow plane plaen cafnu hollow planes plaen cafnu hollow saddle key allwedd gyfrwy cau hollow set set gau hollow sets set gau hollow square bit tongs gefel gegsgwar hollow tree coeden gau hollow trees coeden gau hollow ware ceunwyddau hollowing cafnu hollowing block bloc cafnu hollowing blocks bloc cafnu hollowing hammer morthwyl cafnu hollowing hammers morthwyl cafnu hollows pant holmium holmiwm (Ho) holmiums holmiwm (Ho) holocaust holocost holocausts holocost holomorphic holomorffig holophytic holoffytig holozoic holosöig holy sanctaidd holy book llyfr bendigaid holy books llyfr bendigaid holy communion cymun bendigaid holy communions cymun bendigaid holy day dydd gŵyl homage gwrogaeth homages gwrogaeth home cartref home hafanu home army byddin gartref home background cefndir cartref home backgrounds cefndir cartref home computer market marchnad y cyfrifiaduron cartref home computer markets marchnad y cyfrifiaduron cartref home cured bacon cig moch cartref home cured bacons cig moch cartref home economics economeg y cartref home economist economegydd cartref home economists economegydd cartref home education addysg gartref home educations addysg gartref home farm fferm y plas home farms fferm y plas home front ffrynt cartref home fronts ffrynt cartref home help cymorth cartref (service) home help cynorthwyydd cartref (person) home help organizer trefnydd cymorth cartref home help organizers trefnydd cymorth cartref home helps cymorth cartref (service) home helps cynorthwyydd cartref (person) home key cywair gwreiddiol (of musical notes) home market marchnad gartref home markets marchnad gartref home ownership perchentyaeth home ownerships perchentyaeth home page tudalen gartref home pages tudalen gartref home rule ymreolaeth home ruler ymreolwr home rulers ymreolwr home rules ymreolaeth home run rhediad adref home runs rhediad adref home shopping siopa o'r cartref home tonic tonydd cysefin home tonics tonydd cysefin home visit ymweliad cartref home visits ymweliad cartref home worker gweithiwr cartref home workers gweithiwr cartref home-made goods nwyddau cartref homegrown timber coed cartref homegrown vegetables llysiau cartref homeland mamwlad homelands mamwlad homeless digartref homelessness bod yn ddigartref homeopathy homeopathi homeostasis homeostasis homeostatic mechanism mecanwaith homeostatig homeostatic mechanisms mecanwaith homeostatig homeothermic homeothermig homes cartref homespun brethyn cartref homespuns brethyn cartref homestead tyddyn homesteads tyddyn homework gwaith cartref homeworks gwaith cartref homily homili homocyclic homoseiclig homogeneity homogenedd homogeneous homogenaidd homography homograffeg homologous homologaidd homologous series cyfres homologaidd homologue homolog homologues homolog homology homoleg homolytic fission ymholltiad homolytig homolytic fissions ymholltiad homolytig homomorphic homomorffig homomorphism homomorffedd homomorphisms homomorffedd homophonic homoffonig homosporous homosboraidd homothetic homothetig homozygous homosygaidd hone carreg hogi hone hogi hone hôn hones carreg hogi hones hôn honest competition cystadlu gonest honey guide dynodyn mêl honey guides dynodyn mêl honeycomb diliau mêl honeycomb smocking smocwaith crwybr honeycomb smockings smocwaith crwybr honeycomb stitch pwyth crwybr honeycomb stitches pwyth crwybr honeycombed crwybrog honeycombed door drws crwybr gwenyn honeycombed doors drws crwybr gwenyn honeycombing crwybro honeysuckle pattern patrwm gwyddfid honeysuckle patterns patrwm gwyddfid honing guide tywyswr hogi honing guides tywyswr hogi honorary degree gradd er anrhydedd honorary degrees gradd er anrhydedd honour anrhydedd (in general) honour anrhydeddu (in general) honour arglwyddiaeth freiniol (feudal) honours anrhydedd (in general) honours arglwyddiaeth freiniol (feudal) honours degree gradd anrhydedd honours degrees gradd anrhydedd hood cwfl (on garment) hood lwfer (above fire etc) hoods cwfl (on garment) hoods lwfer (above fire etc) hoof foot troed garn hoof foots troed garn hook bach (of implement) hook bachiad (=act of hooking) hook bachu hook gwrach (=harp peg) hook and bolt bach a bollt hook and eye bach a llygad hook shot bachiad hook shots bachiad hook wrench tyndro bach hook wrenches tyndro bach hooked spit tafod bachog hooked spits tafod bachog hooker bachwr (in rugby) hookers bachwr (in rugby) hooks bach (of implement) hooks bachiad (=act of hooking) hooks gwrach (=harp peg) hooliganism hwliganiaeth hooliganisms hwliganiaeth hoop cylch hoop cylchu (a wheel) hooper daliwr hoopers daliwr hoops cylch hop herc hop hercian hopeless anobeithiol hopper hopran hoppers hopran hops hopys hopsack hopsac hopsacks hopsac horde llu hordes llu horizon gorwel horizon line llinell orwel horizon lines llinell orwel horizons gorwel horizontal llorwedd horizontal llorweddol horizontal astride vault llofnaid hir ar led horizontal astride vaults llofnaid hir ar led horizontal axis echelin lorweddol horizontal bar bar llorweddol horizontal bars bar llorweddol horizontal boring borio llorweddol horizontal branch pipe peipen gangen lorweddol horizontal branch pipes peipen gangen lorweddol horizontal buttonhole twll botwm llorweddol horizontal buttonholes twll botwm llorweddol horizontal centring canoli llorweddol horizontal chiselling naddu llorweddol horizontal control rheolaeth lorweddol horizontal controls rheolaeth lorweddol horizontal equivalent cywerth llorwedd horizontal equivalents cywerth llorwedd horizontal force grym llorweddol horizontal forces grym llorweddol horizontal grouping grwpio llorweddol horizontal integration integreiddio llorweddol horizontal kneeling penlinio llorweddol horizontal line llinell lorweddol horizontal lines llinell lorweddol horizontal milling machine peiriant melino llorwedd horizontal milling machines peiriant melino llorwedd horizontal paring naddu llorweddol horizontal plane plân llorweddol (H.P.) horizontal planes plân llorweddol (H.P.) horizontal pug mill melin gleio lorweddol horizontal pug mills melin gleio lorweddol horizontal range cyrhaeddiad llorweddol horizontal ranges cyrhaeddiad llorweddol horizontal relationship perthynas lorweddol horizontal relationships perthynas lorweddol horizontal scale graddfa lorweddol horizontal scales graddfa lorweddol horizontal section trychiad llorweddol horizontal sections trychiad llorweddol horizontal stripe rhes lorweddol horizontal stripes rhes lorweddol horizontal through vault llofnaid fwlch hir horizontal through vaults llofnaid fwlch hir horizontal traces olinau llorweddol horizontality llorwedd-dra horizontals llorwedd hormonal hormonaidd hormone hormon hormones hormon horn corn horn passage caniad y cyrn horn passages caniad y cyrn horn player canwr corn horn players canwr corn hornbook llyfr corn hornbooks llyfr corn hornpipe cornddawns (dance) hornpipe pibgorn (instrument) hornpipes cornddawns (dance) hornpipes pibgorn (instrument) horns corn horny texture gwead cornaidd horny textures gwead cornaidd horoscope horosgop horoscopes horosgop horror arswyd horrors arswyd horse ceffyl (of animal) horse hors (for airing clothes) horse latitudes lledredau'r meirch horse with pommels ceffyl â chorfau horsepower marchnerth horsepowers marchnerth horses ceffyl (of animal) horses hors (for airing clothes) horseshoe pedol ceffyl horseshoe arch bwa pedol horseshoe arches bwa pedol horseshoe magnet magnet pedol horseshoe magnets magnet pedol horseshoes pedol ceffyl horst horst horsts horst hose pipe peipen ddŵr rwber hose pipes peipen ddŵr rwber hosiery hosanwaith hospice hosbis hospices hosbis hospital ysbyty hospital play specialist arbenigwr chwarae ysbyty hospital play specialists arbenigwr chwarae ysbyty hospitalize anfon i'r ysbyty hospitals ysbyty host gwesteiwr (of person or computer) host gwestywr (at hotel) host organeb letyol (organism) host cell cell letyol host cells cell letyol hostage gwystl hostages gwystl hostel hostel hostels hostel hosts gwesteiwr (of person or computer) hosts gwestywr (at hotel) hosts organeb letyol (organism) hot gorgynnes (in metalworking) hot poeth hot blast chwythiad gorgynnes hot blasts chwythiad gorgynnes hot colour lliw gorgynnes (in metalworking) hot colours lliw gorgynnes (in metalworking) hot cross bun picen y Grog hot cross buns picen y Grog hot dip galvanizing galfanu dip poeth hot dipping dipio poeth hot iron haearn poeth hot irons haearn poeth hot metal metel gorgynnes (in metalworking) hot metals metel gorgynnes (in metalworking) hot sand tywod gorgynnes hot sands tywod gorgynnes hot set set boeth hot sets set boeth hot shortness poeth freuder hot spot man poeth hot spots man poeth hot spring tarddell boeth hot springs tarddell boeth hot strip mill melin strip boeth hot strip mills melin strip boeth hot water dye llifyn dŵr poeth hot water dyes llifyn dŵr poeth hot water starch startsh dŵr poeth hot water starches startsh dŵr poeth hot wire gwifren boeth hot wires gwifren boeth hot-housing gorysgogi (=overstimulation) hotbed magwrfa hotbeds magwrfa hotel gwesty hotel chain cadwyn o westai hotel chains cadwyn o westai hotel management rheolaeth gwesty hotel managements rheolaeth gwesty hotels gwesty hotness poethder hour awr hour angle ongl awr hour angles ongl awr hourly rate tâl yn ôl yr awr hourly rates tâl yn ôl yr awr hours awr hours of labour oriau o lafur house tŷ house church eglwys dŷ house churches eglwys dŷ house contents policy polisi cynnwys y tŷ house officer meddyg tŷ house officers meddyg tŷ house price pris tŷ house prices pris tŷ house to let tŷ ar osod housebote anheddfudd housebotes anheddfudd housebound caeth i'r tŷ housecraft crefft cadw tŷ housecrafts crefft cadw tŷ housed shelf silff rigolog housed shelfs silff rigolog houseflies clêr household cartref (=home) household gosgordd (=retinue) household tŷ (=a house and its affairs) household goods nwyddau tŷ household linen llieiniau tŷ household soap sebon golchi household soaps sebon golchi householder deiliad y tŷ householders deiliad y tŷ households cartref (=home) households gosgordd (=retinue) households tŷ (=a house and its affairs) housekeeping cadw tŷ housekeeping allowance lwfans cadw tŷ housekeeping allowances lwfans cadw tŷ housemaid morwyn tŷ housemaids morwyn tŷ houses tŷ housewife gwraig tŷ housewifery crefft cadw tŷ housewifes gwraig tŷ housing rhigol (for track, joint) housing tai (in general) housing action area ardal weithredu ar dai housing action areas ardal weithredu ar dai housing association cymdeithas tai housing associations cymdeithas tai housing benefit budd-dal tai housing benefit supplement atodiad budd-dal tai housing benefit supplements atodiad budd-dal tai housing benefits budd-dal tai housing circlip cylchglip mewn rhigol housing circlips cylchglip mewn rhigol housing department adran dai housing departments adran dai housing estate stad o dai housing estates stad o dai housing joint uniad rhigol draws housing joints uniad rhigol draws housing problems problemau cartrefu housing provision darparu tai housing subsidy cymhorthdal tai housings rhigol (for track, joint) hovercraft hofrenfad hovercrafts hofrenfad how's that? howsat? hub both hue arlliw hue and cry gwaedd ac ymlid hug cofleidio hug the ball cofleidio'r bêl hug the knees cofleidio'r pengliniau hulk llong garchar (=prison ship) hulks llong garchar (=prison ship) hull corff llong hulls corff llong hum tas galch (in geography) human bod dynol human dynol human activity gweithgarwch dynol human behaviour ymddygiad dynol human behaviours ymddygiad dynol human body corff dynol human capital cyfalaf dynol human capitals cyfalaf dynol human character cymeriad dynol human characters cymeriad dynol human computer interface rhyngwyneb dynol y cyfrifiadur human computer interfaces rhyngwyneb dynol y cyfrifiadur human development datblygiad dynol human developments datblygiad dynol human digestive system system dreulio ddynol human digestive systems system dreulio ddynol human environment amgylchedd dynol human environments amgylchedd dynol human features nodweddion dynol human figure ffigur dynol human figures ffigur dynol human form ffurf ddynol human forms ffurf ddynol human genetics geneteg dyn human geography daearyddiaeth ddynol human processes prosesau dynol human resource planning cynllunio adnoddau dynol human resources adnoddau dynol human resources function swyddogaeth adnoddau dynol human resources functions swyddogaeth adnoddau dynol human resources manager rheolwr adnoddau dynol human resources managers rheolwr adnoddau dynol human rights iawnderau dynol humanisitic art celfyddyd ddyneiddiol humanisitic arts celfyddyd ddyneiddiol humanism dyneiddiaeth humanisms dyneiddiaeth humanist dyneiddiwr humanistic dyneiddiol humanistic education addysg ddyneiddiol humanistic educations addysg ddyneiddiol humanists dyneiddiwr humanitarian dyngarol humanitarian dyngarwr humanitarianism dyngarwch humanitarianisms dyngarwch humanitarians dyngarwr humanities dyniaethau humanity dynoliaeth humans bod dynol humerus hwmerws humid llaith humidification lleithiad humidifications lleithiad humidifier lleithydd humidifiers lleithydd humidity lleithder humification llufadredd humifications llufadredd humiliation cywilydd humiliations cywilydd hummock ponc hummocks ponc hummocky ponciog humus hwmws hundred cant (=100) hundred cantref (=administrative area) hundred court llys y cantref hundred courts llys y cantref hundred metres can metr hundred metres race ras gan metr hundred metres races ras gan metr hundred square sgwâr cant hundred squares sgwâr cant hundreds cant (=100) hundreds cantref (=administrative area) hundredth canfed hundredths canfed hunter heliwr hunter's moon lleuad hela hunter's moons lleuad hela hunter-gatherer heliwr-gasglwr hunter-gatherers heliwr-gasglwr hunters heliwr hurdle clwyd hurdle race ras glwydi hurdle races ras glwydi hurdler clwydwr hurdlers clwydwr hurdles clwyd hurricane corwynt hurricanes corwynt husbandry hwsmonaeth husk plisgyn husks plisgyn hussar hwsâr hussars hwsâr hustings hysting hyaline cartilage cartilag hyalin hyaline cartilages cartilag hyalin hyaluronic acid asid hyalwronig hyaluronic acids asid hyalwronig hybrid croesryw hybrid vigour ymnerth croesryw hybrid vigours ymnerth croesryw hybridisation croesrywedd hybridisations croesrywedd hybrids croesryw hydathode hydathod hydathodes hydathod hydrate hydrad hydrate hydradu hydrated hydradol hydrates hydrad hydration hydradiad hydrations hydradiad hydraulic hydrolig hydraulic lift lifft hydrolig hydraulic lifts lifft hydrolig hydraulic organ chwythorgan ddŵr hydraulic organs chwythorgan ddŵr hydraulic press gwasgydd hydrolig hydraulics hydroleg hydride hydrid hydrides hydrid hydrocarbon hydrocarbon hydrocarbon fuel tanwydd hydrocarbon hydrocarbon fuels tanwydd hydrocarbon hydrocarbons hydrocarbon hydrocephalic hydroceffalig hydrochloric acid asid hydroclorig hydrochloric acids asid hydroclorig hydrodynamics hydrodynameg hydroelectric trydan dŵr hydroelectric power pŵer trydan dŵr hydroelectric powers pŵer trydan dŵr hydroelectrics trydan dŵr hydrofoil hydroffoil hydrofoils hydroffoil hydrogen hydrogen (H) hydrogen acceptor derbynnydd hydrogen hydrogen acceptors derbynnydd hydrogen hydrogen peroxide hydrogen perocsid hydrogen peroxides hydrogen perocsid hydrogenate hydrogenu hydrogenated hydrogenaidd hydrogenation hydrogeniad hydrogenations hydrogeniad hydrogenize hydrogenu hydrogens hydrogen (H) hydrograph hydrograff hydrographs hydrograff hydrography hydrograffeg hydrolapse cwymp gwlithbwynt hydrolapses cwymp gwlithbwynt hydrological cycle cylchred hydrolegol hydrological cycles cylchred hydrolegol hydrology hydroleg hydrolyse hydrolysu hydrolysis hydrolysis hydrometer hydromedr hydrometers hydromedr hydrophilic hydroffilig hydrophobic hydroffobig hydrophobics hydroffobig hydropool hydrobwll hydropools hydrobwll hydroscopic hydrosgopig hydrosphere hydrosffer hydrospheres hydrosffer hydrostatic hydrostatig hydrostatics hydrostateg hydrothermal hydrothermol hydrotropism hydrotropedd hydrotropisms hydrotropedd hydroxide hydrocsid hydroxides hydrocsid hydroxyethanoic acid asid hydrocsiethanöig hydroxyethanoic acids asid hydrocsiethanöig hydroxyproline hydrocsiprolin hydroxyprolines hydrocsiprolin hyetograph hyetograff hyetographs hyetograff hygiene hylendid hygienes hylendid hygienic hylan hygrogram hygrogram hygrograms hygrogram hygrometer hygromedr hygrometers hygromedr hygroscopic hygrosgopig hymn emyn hymn tune emyn-dôn hymn tunes emyn-dôn hymns emyn hypabyssal rock craig hypabysol hypabyssal rocks craig hypabysol hyper major gorfwyaf hyper majors gorfwyaf hyperactive child plentyn gorfywiog hyperactive childs plentyn gorfywiog hyperactivity gorfywiogrwydd hyperbola hyperbola hyperbolas hyperbola hyperbole gormodiaith hyperboles gormodiaith hyperbolic hyperbolig hyperbolic function ffwythiant hyperbolig hyperbolic functions ffwythiant hyperbolig hyperboloid hyperboloid hyperboloids hyperboloid hypergeometric hypergeometrig hyperinflation gorchwyddiant hyperinflations gorchwyddiant hypermarket archfarchnad hypermarkets archfarchnad hypermedia hypergyfryngau hyperplasia gordyfiant hyperplasias gordyfiant hypertension gorbwysedd (blood pressure) hypertensions gorbwysedd (blood pressure) hypertext hyperdestun hypertext knowledge gwybodaeth hyperdestun hypertext knowledges gwybodaeth hyperdestun hypertext link cyswllt hyperdestun hypertext links cyswllt hyperdestun hypertext mark-up language iaith farcio hyperdestun hypertext mark-up languages iaith farcio hyperdestun hypertexts hyperdestun hypertonic hypertonig hypertrochoid hypertrocoid hypertrochoids hypertrocoid hypertrophy hypertroffedd hyperventilation goranadlu hypha hyffa hyphal hyffaidd hyphas hyffa hyphen cysylltnod hyphenation exception eithriad cysylltnodi hyphenation exceptions eithriad cysylltnodi hyphens cysylltnod hypochlorite bleach cannydd hypoclorit hypochlorite bleaches cannydd hypoclorit hypocycloid hypocylchoid hypocycloids hypocylchoid hypodermal hypodermaidd hypodermic tangroenol hypodermic needle theory damcaniaeth nodwydd hypodermig hypogeal tanddaearol hypoglossal isdafodol hypomode modd deilliedig hypomodes modd deilliedig hyposecretion hyposecretiad hyposecretions hyposecretiad hypotension isbwysedd hypotensions isbwysedd hypotenuse hypotenws hypotenuses hypotenws hypothalamus hypothalamws hypothermia hypothermia hypothermias hypothermia hypothesis rhagdybiaeth hypothesis test prawf rhagdybiaeth hypothesis testing profi rhagdybiaethau hypothesis tests prawf rhagdybiaeth hypotonic to hypotonig i hypsography hypsograffeg hypsometer hypsomedr hypsometers hypsomedr hypsometric hypsometrig hysteresis hysteresis hysteria hysteria hysterias hysteria iambic dyrchafedig iambus corfan dyrchafedig ice iâ ice axe caib eira ice axes caib eira ice barrier bar iâ ice barriers bar iâ ice bound rhewgaeth ice cap cap iâ ice caps cap iâ ice cold wind rhewynt ice cold winds rhewynt ice dam argae iâ ice dams argae iâ ice edge ymyl iâ ice edges ymyl iâ ice fall rhewgwymp ice falls rhewgwymp ice floe ffloch iâ ice floes ffloch iâ ice fog niwl iâ ice fogs niwl iâ ice front ffrynt iâ ice fronts ffrynt iâ ice jam tagfa iâ ice jams tagfa iâ ice lobe llabed iâ ice lobes llabed iâ ice marginal channel sianel iâ ymylol ice marginal channels sianel iâ ymylol ice peg peg iâ ice pegs peg iâ ice shattered rhewddrylliog ice sheet llen iâ ice sheets llen iâ ice shelf sgafell iâ ice shelfs sgafell iâ ice wedge lletem iâ ice wedges lletem iâ iceberg mynydd iâ icebergs mynydd iâ icicle pibonwyen icicles pibonwyen icon eicon iconic eiconig iconic representation portread eiconig iconic representations portread eiconig iconic thinking meddwl eiconig iconoclasm delwddrylliad iconoclasms delwddrylliad iconoclast delwddrylliwr iconoclastic delwddrylliol iconoclasts delwddrylliwr iconographic eiconograffig iconography eiconograffeg iconography and practice eiconograffeg ac ymarfer icons eicon icosahedron icosahedron icosahedrons icosahedron icy cold rhewllyd idea syniad ideal delfryd (in general) ideal delfrydol (in general) ideal ideal (in mathematics) ideal perffaith (in physics) ideal gas nwy delfrydol idealism delfrydiaeth (in general) idealisms delfrydiaeth (in general) idealist delfrydwr idealists delfrydwr idealization delfrydiad idealizations delfrydiad ideals delfryd (in general) ideals ideal (in mathematics) ideas syniad idemfactor idemffactor idemfactors idemffactor idempotent idempotent identical unfath identical twin gefell unfath identical twins gefell unfath identifiable canfyddadwy identification adnabyddiaeth identification uniaethu (with someone) identifications adnabyddiaeth identified need angen canfyddadwy identified needs angen canfyddadwy identifier dynodwr identifiers dynodwr identify adnabod (=establish the identity of, recognize) identify canfod (by analysis of the circumstances) identify nodi (=note) identify the specimen enwi'r sbesimen identifying needs adnabod anghenion identity hunaniaeth (=personality) identity unfathiant (=absolute sameness) identity band band adnabod identity bands band adnabod identity card cerdyn adnabod identity cards cerdyn adnabod identity element elfen unfathiant identity elements elfen unfathiant ideogram ideogram ideograms ideogram ideologue ideolegwr ideologues ideolegwr ideology ideoleg idle resources adnoddau segur idle return stroke strôc ddychwel segur idle return strokes strôc ddychwel segur idle rich cyfoethogion segur idler wheels olwynion cyswllt idling speed cyflymder segura idling speeds cyflymder segura idol eilun idolatry eilunaddoliaeth idols eilun igloo iglw igneous igneaidd igneous rock craig igneaidd igneous rocks craig igneaidd ignite cynnau ignition taniad ignition system system danio ignition systems system danio ignitions taniad ignorance anwybodaeth ignorances anwybodaeth ignore anwybyddu ignore character nod anwybyddu ignore characters nod anwybyddu ileum ilewm ileums ilewm iliac iliag iliac artery rhydweli iliag iliac vein gwythïen iliag iliac veins gwythïen iliag iliolumbar artery rhydweli iliolymbar ilium iliwm iliums iliwm illegal anghyfreithlon illegal character nod anghyfreithlon illegal characters nod anghyfreithlon illegality anghyfreithlondeb illegitimate anghyfreithlon illiteracy anllythrennedd illiterate anllythrennog illness afiechyd illness behaviour ymddygiad afiechyd illness behaviours ymddygiad afiechyd illuminant goleuydd illuminants goleuydd illuminate goleuo (=light up) illuminate goliwio (=decorate a manuscript) illuminated goliwiedig (of manuscript) illuminated lettering llythrennu goliwiedig illuminated manuscript llawysgrif oliwiedig illuminated manuscripts llawysgrif oliwiedig illuminated script sgript oliwiedig illuminated scripts sgript oliwiedig illuminating power goleunerth illuminating powers goleunerth illumination golau (=light) illumination goliwiad (of manuscript) illumination factor ffactor goleuo illumination factors ffactor goleuo illuminations golau (=light) illuminations goliwiad (of manuscript) illuminism ilwminiaeth illuminisms ilwminiaeth illuminist ilwminydd illuminists ilwminydd illusion rhith illusionism rhithiolaeth illusionisms rhithiolaeth illusions rhith illustrate darlunio (with a drawing) illustrate egluro (=explain or make clear) illustrate enghreifftio (with an example) illustrated darluniadol (with drawings) illustrated eglurhaol (with examples) illustration darlun (=picture) illustration darlun eglurhaol (=drawing or picture illustrating a book etc) illustration darluniad (=act or instance of illustrating) illustration enghraifft (=example) illustrations darlun (=picture) illustrations darlun eglurhaol (=drawing or picture illustrating a book etc) illustrations darluniad (=act or instance of illustrating) illustrations enghraifft (=example) illustrative darluniadol (=containing drawing or pictures) illustrative enghreifftiol (serving as an explanation or example) illuvial mewnlifol illuviation mewnlif illuviations mewnlif image delw (=idol) image delwedd (=representation, idea) image analysis dadansoddi delweddau image manipulation trin delweddau image processing prosesu delweddau imagery delweddaeth images delw (=idol) images delwedd (=representation, idea) imaginary dychmygol imaginary background cefndir dychmygol imaginary backgrounds cefndir dychmygol imaginary part rhan ddychmygol imaginary parts rhan ddychmygol imaginary world byd dychmygol imaginary worlds byd dychmygol imagination dychymyg imaginations dychymyg imaginative llawn dychymyg imaginative composition cyfansoddiad llawn dychymyg imaginative compositions cyfansoddiad llawn dychymyg imaginative play chwarae llawn dychymyg imbalance anghydbwysedd imbalances anghydbwysedd imbecile ynfytyn imbeciles ynfytyn imbecility ynfydrwydd imbed plannu imbricated structure adeiledd gorwthiad imbricated structures adeiledd gorwthiad imitate dynwared imitation dynwarediad imitations dynwarediad imitative dynwaredol imitative learning dysgu drwy ddynwared imitative play chwarae efelychol immature anaeddfed immature soil pridd anaeddfed immature soils pridd anaeddfed immediacy digyfryngedd immediate access store storfa uniongyrchol immediate access stores storfa uniongyrchol immediate operand operand uniongyrchol immediate operands operand uniongyrchol immerse trochi immersion trochiad immersion heater gwresogydd troch immersion heaters gwresogydd troch immersion programme rhaglen drochi immersion programmes rhaglen drochi immersions trochiad immigrant mewnfudwr immigrant education addysg mewnfudwyr immigrant educations addysg mewnfudwyr immigrant labour llafur estron immigrant labours llafur estron immigrants mewnfudwr immigrate mewnfudo immigration mewnfudiad immigrations mewnfudiad immiscible anghymysgadwy immobilised enzyme ensym ansymudol immobilised enzymes ensym ansymudol immobility ansymudoledd immoral anfoesol immorality anfoesoldeb immortality anfarwoldeb immunal suppression ataliad imiwnedd immunal suppressions ataliad imiwnedd immune imiwn immune reaction adwaith imiwn immune reactions adwaith imiwn immunisation programme rhaglen imiwneiddio immunisation programmes rhaglen imiwneiddio immunity imiwnedd immunization imiwneiddiad immunizations imiwneiddiad immunize imiwneiddio immunologist imiwnolegydd immunologists imiwnolegydd immunology imiwnoleg immunosuppression atal imiwnedd impact ardrawiad (=firm press) impact effaith (=effect or influence) impact adhesive adlyn ardrawol impact adhesives adlyn ardrawol impact glue glud ardrawol impact glues glud ardrawol impact printer argraffydd traw impact printers argraffydd traw impact resistance gwrthiant ardrawiad impact resistances gwrthiant ardrawiad impact sound sŵn gwrthdaro impact sounds sŵn gwrthdaro impact strength nerth ardrawiad impact strengths nerth ardrawiad impacted cywasgedig impacts ardrawiad (=firm press) impacts effaith (=effect or influence) impair amharu ar impaired diffygiol impairment nam impairments nam impasto impasto impeach uchelgyhuddo impeachment uchelgyhuddiad impeachments uchelgyhuddiad impedance rhwystriant impedances rhwystriant impede rhwystro impediment nam impediments nam impeller pwlsadur (pulsator) impellers pwlsadur (pulsator) imperfect cadence diweddeb amherffaith imperfect cadences diweddeb amherffaith imperfect competition cystadleuaeth amherffaith imperfect competitions cystadleuaeth amherffaith imperfection amherffeithrwydd imperfections amherffeithrwydd imperial imperial (measure) imperial imperialaidd (of expansionist aims) imperial ymerodrol (of empire) imperial history hanes yr ymerodraeth imperialism imperialaeth imperialisms imperialaeth imperialist imperialydd imperialists imperialydd impermeable anathraidd impermeable membrane pilen anathraidd impermeable membranes pilen anathraidd impersonal amhersonol impervious anhydraidd impetus ysgogiad impinge ardaro implant mewnblaniad implant mewnblannu implant a cell in the placenta mewnblannu cell yn y brych implantation mewnblannu implants mewnblaniad implement gweithredu implementation gweithred (in mathematics) implementations gweithred (in mathematics) implication goblygiad implication of trend goblygiad y duedd implications goblygiad implicit ymhlyg implicit function ffwythiant ymhlyg implicit functions ffwythiant ymhlyg implied ymhlyg implied terms telerau dealledig implosion mewnffrwydrad implosions mewnffrwydrad imply ymhlygu impolder polderu import mewnforio import mewnforyn import duty toll mewnforio import replacement amnewid mewnforion import tariff toll mewnforio import tariffs toll mewnforio imported timber coed sy'n cael eu mewnforio importer mewnforiwr importers mewnforiwr imports mewnforyn impose gosod impost treth imposts treth impound powndio impoverish tlodi impoverishment tlodi impoverishments tlodi impregnate ffrwythloni (in biology) impregnate trwytho (=saturate) impregnated wadding wadin trwythedig impregnated waddings wadin trwythedig impregnation ffrwythloniad (in biology) impregnation trwythiad (=saturation) impregnations ffrwythloniad (in biology) impregnations trwythiad (=saturation) impresario impresario impression argraff impressionable argraffadwy impressionism argraffiadaeth impressionisms argraffiadaeth impressionist argraffiadydd impressionistic argraffiadol impressionists argraffiadydd impressions argraff impressive nodedig impressment gorfodaeth impressments gorfodaeth imprimatur imprimatur imprimatura imprimatura imprimaturas imprimatura imprimaturs imprimatur imprint gwasgnod (of knurling tool) imprints gwasgnod (of knurling tool) impromptu byrfyfyr impromptu impromptu impromptus impromptu improper afreolaidd improper fraction ffracsiwn pendrwm improper fractions ffracsiwn pendrwm impropriate amfeddu impropriate tithe degwm amfedd impropriate tithes degwm amfedd impropriation amfeddiad impropriations amfeddiad impropriator amfeddwr impropriators amfeddwr improve gwella improve performance gwella perfformiad improved land tir wedi ei wella improved lands tir wedi ei wella improved varieties gwell amrywogaethau improvement gwelliant improvement grant grant gwella improvement grants grant gwella improvements gwelliant improving the school grounds gwella tir yr ysgol improvisation creu'n fyrfyfyr improvise addasu byrfyfyr (=adapt) improvise chwarae'n fyrfyfyr (in music playing) improvised byrfyfyr improvised apparatus offer byrfyfyr improvised testing profi byrfyfyr impulse ergyd impulse symbyliad (=mental incitement) impulse ysgogiad (nervous) impulse buying prynu byrbwyll impulses ergyd impulses symbyliad (=mental incitement) impulses ysgogiad (nervous) impulsive ergydiol impulsive tension tensiwn ergydiol impulsive tensions tensiwn ergydiol impure amhur impurity amhuredd imputed cost cost briodoledig imputed costs cost briodoledig in care mewn gofal in good proportion mewn cyfrannedd da in her personal capacity dan ei henw ei hun in his personal capacity dan ei enw ei hun in parallax mewn paralacs in proportion mewn cyfrannedd in register mewn iawn luniad in reserve wrth gefn in sequence yn olynol in series mewn cyfres in the course of employment yng nghwrs cyflogaeth in the nude yn noethlymun in the proportion yn y gyfrannedd in the round yn dri dimensiwn in twos yn ddeuoedd in vitro in vitro in vitro fertilization ffrwythloni in vitro (IVF) in vivo in vivo in vogue mewn bri in-house mewnol in-line mewn llinell in-line point follower dilynwr pwynt mewn-llinell in-line point followers dilynwr pwynt mewn-llinell in-line production cynhyrchu mewn-llinell in-line roller rholer mewn-llinell in-line rollers rholer mewn-llinell in-patient claf mewnol in-patients claf mewnol in-range mewn amrediad in-service education addysg mewn swydd in-service educations addysg mewn swydd in-service training course cwrs hyfforddiant mewn swydd in-service training courses cwrs hyfforddiant mewn swydd inability anallu inaccessibility anhygyrchedd inaccessible anhygyrch inaccuracy anghywirdeb inaccurate gwallus inaccurate size maint gwallus inaccurate sizes maint gwallus inactivate anactifadu inactive anactif (in chemistry) inactivity anactifedd inadequate annigonol inanimate difywyd inappropriate clothing dillad anaddas inaudible anhyglyw inaugural agoriadol inaugural lecture darlith sefydlu inaugural lectures darlith sefydlu inaugural speech araith sefydlu inaugural speeches araith sefydlu inaugurate sefydlu inblowing wind gwynt mewnchwyth inblowing winds gwynt mewnchwyth inborn cynhenid inborn capacity gallu cynhenid inborn errors of metabolism gwallau cynhenid metabolaeth inbound i mewn (of flights, traffic etc) inbreed mewnfridio incandescence gwyniasedd incandescences gwyniasedd incandescent gwynias incandescent cloud cwmwl gwynias incandescent clouds cwmwl gwynias incantation swyngan incantations swyngan incarcerate carcharu incarnation ymgnawdoliad incarnations ymgnawdoliad incendiarism llosgyddiaeth incendiarisms llosgyddiaeth incendiary bom tân (bomb) incense arogldarth (sweet smelling gum or spice) incense cynhyrfu (=enrage) incenses arogldarth (sweet smelling gum or spice) incentive cymhelliad incentive travel teithio cymhellol incentives cymhelliad incentre mewnganol incentres mewnganol incest llosgach incests llosgach inch modfedd inches modfedd incidence nifer (of cases) incidence trawiad (in physics) incidence of rainfall dygwydd glawiad incidences nifer (of cases) incidences trawiad (in physics) incident digwyddiad (=occurrence) incident trawol (=striking) incident treth (feudal) incident radiation pelydriad trawol incident radiations pelydriad trawol incident ray pelydryn trawol incidents digwyddiad (=occurrence) incidents treth (feudal) incipient plasmolysis plasmolysis cychwynnol incircle mewngylch (inscribed circle) incircles mewngylch (inscribed circle) incise endorri incised alphabet gwyddor endoredig incised alphabets gwyddor endoredig incised carving cerfiad endorri incised carvings cerfiad endorri incised meander ystum rhychog incised meanders ystum rhychog incised moulding mowldin endoredig incised mouldings mowldin endoredig incised wound clwyf toriad incised wounds clwyf toriad incising knife cyllell endorri incising knifes cyllell endorri incision endoriad incisions endoriad incisor blaenddant incisors blaenddant incline goledd incline goleddu incline inclein (in a slate quarry) incline of difficulty goledd anhawster inclined ar oledd inclined face wyneb ar oledd inclined faces wyneb ar oledd inclined plane plân ar oledd inclined planes plân ar oledd inclined rope rhaff ar oledd inclined ropes rhaff ar oledd inclined solids solidau ar oledd inclines goledd inclines inclein (in a slate quarry) include cynnwys included angle ongl gynwysedig included angles ongl gynwysedig inclusion cynhwysiad inclusions cynhwysiad inclusive cynhwysol income incwm income elasticity elastigedd incwm income group grŵp incwm income groups grŵp incwm income support cymhorthdal incwm income supports cymhorthdal incwm income tax treth incwm income taxes treth incwm incomes incwm incommensurable anghymesur incompatible anghydnaws (of objects) incompatible anghymarus (of people) incompetence anghymwyster incompetence model model anallu incompetence models model anallu incompetences anghymwyster incomplete anghyflawn incomplete dominance trechedd anghyflawn incomplete dominances trechedd anghyflawn incomplete view golwg anghyflawn incomplete views golwg anghyflawn incompressible anghywasg inconsistency anghysondeb inconsistent anghyson incontinence anymataliaeth incontinences anymataliaeth incontinent anymataliol inconvenience anhwylustod inconveniences anhwylustod incorrect anghywir increase cynnydd increase cynyddu increase rate cyfradd cynnydd increase rates cyfradd cynnydd increase stitches cynyddu pwythau increases cynnydd increasing control rheolaeth gynyddol increasing controls rheolaeth gynyddol increasing cost cost gynyddol increasing costs cost gynyddol increasing fluency rhwyddineb cynyddol increasing sequence dilyniant cynyddol increasing sequences dilyniant cynyddol increment cynyddiad (in computing) incremental cynyddol increments cynyddiad (in computing) incrustation crameniad incrustations crameniad incrusted cramennog incubation period cyfnod deori (of egg) incubation period cyfnod magu (of disease) incubation periods cyfnod deori (of egg) incubation periods cyfnod magu (of disease) incubator crud cynnal (for babies) incubator deorydd (for eggs) incubators crud cynnal (for babies) incubators deorydd (for eggs) incumbency perigloriaeth incumbent deiliad (of any office) incumbent periglor (of ecclesiastical office) incumbents deiliad (of any office) incumbents periglor (of ecclesiastical office) incursion cipgyrch incursions cipgyrch incus eingion indathrene blue glas indathrin indathrene blues glas indathrin indebted dyledus indefinite amhendant indefinite integral integryn amhendant indefinite integrals integryn amhendant indefinite length hyd amhendant indefinite lengths hyd amhendant indehiscent anymagorol indelible ink inc parhaol indelible inks inc parhaol indemnify rhyddarbed indemnity digollediad (=compensation) indemnity indemniad (=protection or exemption) indent indeintio (legal documents) indent mewnoli (a margin) indent mewnoliad (of margin) indentation danheddiad (=toothlike notches) indentation indeintiad (of legal documents) indentation pantiad (=dent) indentations danheddiad (=toothlike notches) indentations indeintiad (of legal documents) indentations pantiad (=dent) indented danheddus (with toothlike notches) indented paragraph paragraff wedi'i fewnoli indented paragraphs paragraff wedi'i fewnoli indented text testun wedi'i fewnoli indented texts testun wedi'i fewnoli indents mewnoliad (of margin) indenture indeintur indentured labour llafur ymrwymedig indentured labours llafur ymrwymedig indentures indeintur independence annibyniaeth independences annibyniaeth independent annibynnol independent cwmni annibynnol (of television companies) independent assortment of genes rhydd-ddosraniad y genynnau independent chuck crafanc gafael annibynnol independent chucks crafanc gafael annibynnol independent gentry bonedd annibynnol independent learning dysgu annibynnol independent reading level lefel darllen annibynnol independent reading levels lefel darllen annibynnol independent school ysgol annibynnol independent schools ysgol annibynnol independent section adran annibynnol independent sections adran annibynnol independent shop siop annibynnol independent shops siop annibynnol independent study astudio annibynnol independent suspension hongiad annibynnol independent suspensions hongiad annibynnol independent university prifysgol annibynnol independent variable newidyn annibynnol independent variables newidyn annibynnol independently assorting rhydd-ddosrannol independents cwmni annibynnol (of television companies) indeterminacy amhenodrwydd indeterminate amhenderfynedig (in economics) indeterminate key cywair amhenodol index indecs (in mathematics and science) index mynegai (=alphabetical list with references) index mynegeio (list alphabetically with references) index finger mynegfys index fingers mynegfys index linked indecs gyswllt index mode modd mynegai index modes modd mynegai index notation nodiant indecs index notations nodiant indecs index number mynegrif index numbers mynegrif index of proportionality indecs cyfranoledd index pin pìn cyfeirio index pins pìn cyfeirio index register cofrestr mynegai index registers cofrestr mynegai indexed address cyfeiriad mynegedig indexed addressing cyfeirio mynegedig indexed sequential file ffeil ddilyniannol fynegedig indexed sequential files ffeil ddilyniannol fynegedig indexes indecs (in mathematics and science) indexes mynegai (=alphabetical list with references) indexical sign arwydd mynegeiol indexical signs arwydd mynegeiol indicate dangos indicate dynamics dangos dynameg indication arwydd indications arwydd indicator dangosydd indicator of abuse dangosydd camdriniaeth indicators dangosydd indict ditio indictable ditiadwy indictable offence trosedd dditiadwy indictable offences trosedd dditiadwy indictment ditiad indictments ditiad indifference curves cromliniau diwahaniaeth indiffusible anhryledadwy indigenous brodorol indigenous industry diwydiant brodorol indigestible anhydraul indigestion diffyg traul indigestions diffyg traul indirect anuniongyrchol indirect addressing cyfeirio anuniongyrchol indirect care gofal anuniongyrchol indirect carer gofalydd anuniongyrchol indirect carers gofalydd anuniongyrchol indirect cares gofal anuniongyrchol indirect contact cyswllt anuniongyrchol indirect contacts cyswllt anuniongyrchol indirect free kick cic rydd anuniongyrchol indirect free kicks cic rydd anuniongyrchol indirect lighting golau anuniongyrchol indirect lightings golau anuniongyrchol indirect tax treth anuniongyrchol indirect taxes treth anuniongyrchol indiscriminate diwahân indissoluble residue gwaddod annhoddadwy indissoluble residues gwaddod annhoddadwy indistinguishability anwahaniaethrwydd indium indiwm (In) indiums indiwm (In) individual unigol individual unigolyn individual activities gweithgareddau fel unigolyn (in sport) individual demand curve cromlin galw unigol individual demand curves cromlin galw unigol individual game gêm unigol individual games gêm unigol individual performance review adolygiad perfformiad unigol individual performance reviews adolygiad perfformiad unigol individual possession meddiant unigol individual possessions meddiant unigol individual test prawf unigol individual tests prawf unigol individual training and assessment programme rhaglen hyfforddi ac asesu unigol individual training and assessment programmes rhaglen hyfforddi ac asesu unigol individualism unigoliaeth individualisms unigoliaeth individualist unigolydd individualists unigolydd individualized education programme rhaglen addysg unigol individualized education programmes rhaglen addysg unigol individualized reading programme rhaglen ddarllen i'r unigolyn individualized reading programmes rhaglen ddarllen i'r unigolyn individuals unigolyn indivisibility anwahanadrwydd indivisible anwahanadwy indoctrinate cyflyru indol-3-yl-acetic acid asid indol-3-yl-asetig (IAA) indol-3-yl-acetic acids asid indol-3-yl-asetig (IAA) indole indol indole acetic acid asid indol asetig indole acetic acids asid indol asetig indole butyric acid asid indol bwtyrig (IBA) indole butyric acids asid indol bwtyrig (IBA) indoles indol indoor dan do indoor environment amgylchedd dan do indoor environments amgylchedd dan do indoor use defnydd dan do indoor uses defnydd dan do indoor work gwaith dan do indoor works gwaith dan do induce anwytho (in logic, physics etc) induce peri (=cause) induce prysuro (birth) induced anwythol induced charge gwefr anwythol induced charges gwefr anwythol induced fit ffit anwythol induced fits ffit anwythol induct sefydlu inductance anwythiant inductances anwythiant induction anwythiad (in logic, physics etc) induction sefydliad (of a person) induction coil coil anwythiad induction coils coil anwythiad induction course cwrs sefydlu induction courses cwrs sefydlu induction meeting cyfarfod sefydlu induction meetings cyfarfod sefydlu induction stroke strôc anwythiad induction strokes strôc anwythiad induction training hyfforddiant sefydlu induction trainings hyfforddiant sefydlu induction year blwyddyn sefydlu induction years blwyddyn sefydlu inductions anwythiad (in logic, physics etc) inductions sefydliad (of a person) inductive anwythol inductive proof prawf anwythol inductive proofs prawf anwythol inductive sensor synhwyrydd anwythol inductive sensors synhwyrydd anwythol inductor anwythydd inductors anwythydd indulgence maddeueb (papal) indulgences maddeueb (papal) indurated wedi'i chaledu (with feminine nouns) indurated wedi'i galedu (with masculine nouns) induration calediant indurations calediant indusium indwsiwm indusiums indwsiwm industrial diwydiannol industrial action gweithredu diwydiannol industrial area ardal ddiwydiannol industrial areas ardal ddiwydiannol industrial complex cymhlyg diwydiannol industrial complexes cymhlyg diwydiannol industrial conflict gwrthdaro diwydiannol industrial estate stad ddiwydiannol industrial estates stad ddiwydiannol industrial history hanes diwydiannol industrial marketing marchnata diwydiannol industrial melanism melanedd diwydiannol industrial melanisms melanedd diwydiannol industrial practice arfer diwydiannol industrial practices arfer diwydiannol industrial relations cysylltiadau diwydiannol industrial retraining ailhyfforddi diwydiannol industrial sector sector diwydiannol industrial sectors sector diwydiannol industrial training hyfforddiant diwydiannol industrial training board bwrdd hyfforddi diwydiannol industrial training boards bwrdd hyfforddi diwydiannol industrial trainings hyfforddiant diwydiannol industrial tribunal tribiwnlys diwydiannol industrial tribunals tribiwnlys diwydiannol industrial waste gwastraff diwydiannol industrial wastes gwastraff diwydiannol industrialization diwydiannaeth industrializations diwydiannaeth industrialize diwydianeiddio industry diwydiant industry lead body corff arwain diwydiant ineducable anaddysgadwy ineffective aneffeithiol ineffectiveness aneffeithioldeb inefficiency aneffeithlonrwydd inefficient aneffeithlon inelastic anelastig inelastic collision gwrthdrawiad anelastig inelastic collisions gwrthdrawiad anelastig inelastic scattering gwasgariad anelastig inelastic scatterings gwasgariad anelastig inequalities in health anghydraddoldebau iechyd inequality anhafaledd (in mathematics) inequation anhafaliad inequations anhafaliad inert anadweithiol (without active chemical etc properties) inert difywyd (=without inherent power, sluggish) inert colour lliw difywyd inert colours lliw difywyd inert gas nwy anadweithiol inert pair effect effaith pâr anadweithiol inert pair effects effaith pâr anadweithiol inert substance sylwedd anadweithiol inert substances sylwedd anadweithiol inertia inertia (of property of matter) inertia syrthni (=sloth) inertial inertiaidd inertial frame of reference ffrâm gyfeirio inertiaidd inertias inertia (of property of matter) inertias syrthni (=sloth) inessentials anhanfodion inevitable accident damwain anochel inevitable accidents damwain anochel inextensible anestynadwy infacing scarp sgarp mewnwynebol infacing scarps sgarp mewnwynebol infallible anffaeledig infancy babandod infant baban infant baptism bedydd plant infant baptisms bedydd plant infant mortality marwolaethau babanod infant psychology seicoleg babanod infant school ysgol babanod infant schools ysgol babanod infant welfare lles babanod infant welfares lles babanod infanticide babanladdiad infanticides babanladdiad infantile babanaidd infantry gwŷr traed infants baban infect heintio infected heintiedig infection haint (=infectious disease) infection heintiad (act or process) infections haint (=infectious disease) infections heintiad (act or process) infectious heintus infectious disease clefyd heintus infectious diseases clefyd heintus infer casglu inference casgliad inferences casgliad inferential statistics ystadegau casgliadol inferior gwael (of quality) inferior is (of rank) inferior isaf (in anatomy) inferior israddol (=lower and therefore not as good) inferior goods nwyddau gwael inferior resonance cyseiniant israddol inferior resonances cyseiniant israddol inferiority complex cymhleth israddoldeb inferiority complexes cymhleth israddoldeb infertile anffrwythlon infertility anffrwythlondeb infest bod yn bla infestation pla infestations pla infidel anghrediniwr (=unbeliever) infidel pagan (=pagan) infidels anghrediniwr (=unbeliever) infidels pagan (=pagan) infield maes agos infields maes agos infilling mewnlenwad infillings mewnlenwad infiltrate ymdreiddio infimum inffimwm infinite anfeidraidd infinite canon cylchganon infinite canons cylchganon infinite loop dolen ddiddiwedd infinite loops dolen ddiddiwedd infinitely yn anfeidraidd infinitesimal gorfychan infinitesimal gorfychanyn infinitesimals gorfychanyn infinity anfeidredd infirm methedig infirmary clafdy infix mewnddodi infix mewnddodiad infix notation nodiant mewnddodol infix notations nodiant mewnddodol infixes mewnddodiad inflamed llidus inflammable fflamadwy inflammable liquid hylif fflamadwy inflammable liquids hylif fflamadwy inflammable vapour anwedd fflamadwy inflammable vapours anwedd fflamadwy inflammation llid (medical) inflammations llid (medical) inflate chwyddo (in finance) inflate enchwythu (in physics) inflated enchwythedig inflation chwyddiant (of currency) inflation enchwythiad (=distention with air etc) inflation target targed chwyddiant inflation targets targed chwyddiant inflationary chwyddiannol inflations chwyddiant (of currency) inflations enchwythiad (=distention with air etc) inflection ffurfdro inflections ffurfdro inflexibility anhyblygrwydd inflexible anhyblyg inflexion goslef inflexions goslef inflorescence fflurgainc inflorescences fflurgainc inflow llifo i mewn influence dylanwad influence dylanwadu influences dylanwad influenza ffliw influenza virus firws y ffliw influenzas ffliw influx dylifiad influxes dylifiad infold mewnblygu informal anffurfiol informal approach dull anffurfiol informal approaches dull anffurfiol informal care gofal anffurfiol informal carer gofalydd anffurfiol informal carers gofalydd anffurfiol informal cares gofal anffurfiol informal communication cyfathrebu anffurfiol informal education addysg anffurfiol informal educations addysg anffurfiol informal group grŵp anffurfiol informal groups grŵp anffurfiol informal method dull anffurfiol informal methods dull anffurfiol informal reading inventory rhestr ddarllen anffurfiol informal teaching addysgu anffurfiol information gwybodaeth information bit did gwybodaeth information bits did gwybodaeth information channel sianel wybodaeth information channels sianel wybodaeth information desk desg gwybodaeth information desks desg gwybodaeth information handbook llawlyfr gwybodaeth information handbooks llawlyfr gwybodaeth information handling trin gwybodaeth information mapping mapio gwybodaeth information probability field maes tebygolrwydd gwybodaeth information probability fields maes tebygolrwydd gwybodaeth information processing prosesu gwybodaeth information retrieval adalw gwybodaeth information science gwyddor gwybodaeth information sciences gwyddor gwybodaeth information source ffynhonnell gwybodaeth information sources ffynhonnell gwybodaeth information system system wybodaeth information systems system wybodaeth information technology technoleg gwybodaeth (IT) information technology centre canolfan technoleg gwybodaeth (ITEC) information technology centres canolfan technoleg gwybodaeth (ITEC) information test prawf gwybodaeth information tests prawf gwybodaeth information theory theori gwybodaeth informations gwybodaeth informative advertising hysbysebu er gwybodaeth informative label label gwybodaeth informative labels label gwybodaeth informed choice dewis gwybodus informed choices dewis gwybodus informed consent cydsyniad gwybodus informed consents cydsyniad gwybodus infra-basal iswaelodol infraorbital gland chwarren islygadol infraorbital glands chwarren islygadol infrared isgoch infrared grill gridyll isgoch infrared grills gridyll isgoch infrared wave ton isgoch infrared waves ton isgoch infrareds isgoch infrastructure isadeiledd infrastructures isadeiledd infringement trosedd infringements trosedd infuse trwytho infusion arllwysiad (of action) infusion trwyth (=liquid or admixture) infusions arllwysiad (of action) infusions trwyth (=liquid or admixture) ingate trowel trywel gât ingate trowels trywel gât ingenious dyfeisgar ingenuity dyfeisgarwch ingest amlyncu ingestion amlynciad ingestions amlynciad ingot ingot ingot mould mowld ingot ingot moulds mowld ingot ingots ingot ingredient cynhwysyn ingredients cynhwysyn ingress mynediad ingrowing toenail casewin ingrowing toenails casewin ingrown meander ystum lledrych ingrown meanders ystum lledrych inhabitant trigolyn inhabitants trigolyn inhabited cyfannedd inhalant siphon siffon mewnanadlu inhalant siphons siffon mewnanadlu inhalation mewnanadliad inhalations mewnanadliad inhale mewnanadlu inhaled gases nwyon mewnanadledig inhaler mewnanadlydd inhalers mewnanadlydd inherit etifeddu inheritance etifeddiad (of characteristics) inheritances etifeddiad (of characteristics) inherited etifeddol inherited defect nam etifeddol inherited defects nam etifeddol inhibit atal (in biochemistry, psychology) inhibit llesteirio (=hinder) inhibiting ataliol inhibition ataliad (e.g. enzyme and psychological) inhibition swildod (=shyness) inhibitions ataliad (e.g. enzyme and psychological) inhibitions swildod (=shyness) inhibitor atalydd inhibitors atalydd inhibitory ataliol inhibitory centre canolfannyn ataliol inhibitory centres canolfannyn ataliol inhibitory post-synaptic potential IPSP potensial ôl-synaptig ataliol inhospitable digroeso initial cychwynnol initial ability level lefel gallu cychwynnol initial ability levels lefel gallu cychwynnol initial concentration crynodiad cychwynnol initial concentrations crynodiad cychwynnol initial conditions amodau cychwynnol initial curvature crymedd cychwynnol initial curvatures crymedd cychwynnol initial cycle cylchred gychwynnol initial cycles cylchred gychwynnol initial line llinell gychwynnol initial lines llinell gychwynnol initial proposal cynnig cyntaf initial proposals cynnig cyntaf initial rate cyfradd gychwynnol initial rates cyfradd gychwynnol initial teacher training hyfforddiant cychwynnol i athrawon initial teacher trainings hyfforddiant cychwynnol i athrawon initial velocity cyflymder cychwynnol initialization procedure trefn ymgychwyn initialization procedures trefn ymgychwyn initialize ymgychwyn (disc) initiate agor (=open) initiate cychwyn (=start) initiate proceedings cychwyn achos initiation derbyn (into a religion) initiation reaction adwaith cychwynnol initiation reactions adwaith cychwynnol initiative cam cyntaf (=first step) initiative menter (=enterprise) initiatives cam cyntaf (=first step) initiatives menter (=enterprise) inject chwistrellu (into a receptacle) inject rhoi pigiad (a person) injection chwistrelliad (into a receptacle) injection pigiad (into person) injection moulding mowldio chwistrellu injections chwistrelliad (into a receptacle) injections pigiad (into person) injective mapping mapio mewnsaethol injunction gorfodeb (=judicial order of compulsion) injunction gwaharddeb (=judicial order of restraint) injunctions gorfodeb (=judicial order of compulsion) injunctions gwaharddeb (=judicial order of restraint) injury anaf ink inc ink incio ink drier sychydd inc ink driers sychydd inc ink roller rholer inc ink rollers rholer inc ink sac coden inc ink sacs coden inc ink thinner teneuydd inc ink thinners teneuydd inc ink-jet printer argraffydd chwistrell ink-jet printers argraffydd chwistrell inking in incio inking slab slab incio inking slabs slab incio inkle loom gwŷdd incl inkle looms gwŷdd incl inland mewndirol inlay mewnosod inlay mewnosodiad inlay strings llinynnau mewnosod inlet cilfach (of sea, lake) inlet mewnfa (=intake) inlet-head blaen cilfach inlet-heads blaen cilfach inlets cilfach (of sea, lake) inlets mewnfa (=intake) inlier mewngraig inliers mewngraig inn of court neuadd brawdlys innate cynhenid inner mewnol inner bead glain mewnol inner beads glain mewnol inner city dinas fewnol inner city school ysgol dinas fewnol inner city schools ysgol dinas fewnol inner core craidd mewnol inner cores craidd mewnol inner ear clust fewnol inner ears clust fewnol inner face wyneb mewnol inner faces wyneb mewnol inner parts rhannau mewnol inner pedal pedal mewnol inner pedals pedal mewnol innermost nesaf i mewn innervate nerfogi innervation nerfogaeth innervations nerfogaeth innings batiad innominate anenwol (of artery) innovate arloesi innovation arloesedd innovation cyfnewidiad (=alteration) innovation datblygiad newydd (=new development) innovation newyddbeth (=new thing) innovations arloesedd innovations cyfnewidiad (=alteration) innovations datblygiad newydd (=new development) innovations newyddbeth (=new thing) inoculate brechu inoculation brechiad inoculation theory damcaniaeth brechu inoculations brechiad inorganic anorganig input cyfraniad (=contribution of information) input mewnbwn (=information fed into a computer) input mewnbynnu input mewngyrch (in finance) input / output buffer byffer mewnbwn / allbwn input / output buffers byffer mewnbwn / allbwn input / output device dyfais mewnbwn / allbwn input / output devices dyfais mewnbwn / allbwn input / output routine rheolwaith mewnbwn / allbwn input / output routines rheolwaith mewnbwn / allbwn input / output stream mewnlif / all-lif input / output streams mewnlif / all-lif input control system system reoli mewnbwn input control systems system reoli mewnbwn input stream mewnlif input streams mewnlif input unit uned fewnbynnu input units uned fewnbynnu inputs cyfraniad (=contribution of information) inputs mewnbwn (=information fed into a computer) inputs mewngyrch (in finance) inquest cwest inquests cwest inquiry ymchwiliad (=investigation) inquiry ymholiad (=question) inquisition chwilys (=ecclesiastical court) inquisition ymchwiliad (=enquiry) inquisitions chwilys (=ecclesiastical court) inquisitions ymchwiliad (=enquiry) inquisitorial system system holgar inquisitorial systems system holgar insane gwallgof inscribe arysgrifio inscribed circle mewngylch (in-circle) inscribed circles mewngylch (in-circle) inscription arysgrif inscriptions arysgrif insect pryfyn insect attack ymosodiad trychfilod insect attacks ymosodiad trychfilod insect bite pigiad pryfyn insect bites pigiad pryfyn insecticide pryfleiddiad insecticides pryfleiddiad insectivorous pryfysol insects pryfyn insemination ymhadiad inseminations ymhadiad insequent haplif insequent stream ffrwd haplif insequent streams ffrwd haplif insequents haplif insert mewnosod insert mewnosodiad insert file mewnosod ffeil insert header mewnosod pennyn insert merge field mewnosod maes cyfun inserted stitch pwyth cyswllt inserted stitches pwyth cyswllt insertion mewniad insertion sort trefniad mewnosod insertion sorts trefniad mewnosod insertions mewniad inserts mewnosodiad inset mewnosodiad insets mewnosodiad inshore gyda'r glannau inshore fishing pysgota'r glannau inside tu mewn inside callipers caliperau mewnol inside diameter diamedr mewnol inside diameters diamedr mewnol inside forward mewnwr inside forwards mewnwr inside half mewnwr inside halfs mewnwr inside left mewnwr chwith inside lefts mewnwr chwith inside leg coes fewnol inside legs coes fewnol inside micrometer micromedr mewnol inside micrometers micromedr mewnol inside of glove cledr y faneg inside right mewnwr de (of player) inside rights mewnwr de (of player) inside the circle tu mewn i'r cylch inside the circles tu mewn i'r cylch insides tu mewn insight mewnwelediad insights mewnwelediad insolation darheulad insolations darheulad insolubility anhydoddedd insoluble anhydawdd insolvency methdaliad insolvent methdalwr insolvents methdalwr insomnia anhunedd insomnias anhunedd inspect arolygu inspection arolygiad inspection chamber siambr archwilio inspection chambers siambr archwilio inspections arolygiad inspector arolygwr inspectorate arolygiaeth inspectorates arolygiaeth inspectors arolygwr inspiration mewnanadliad (of air) inspiration ysbrydoliaeth (poetic etc) inspirations mewnanadliad (of air) inspirations ysbrydoliaeth (poetic etc) inspiratory reserve volume cyfaint mewnanadlol wrth gefn inspiratory reserve volumes cyfaint mewnanadlol wrth gefn inspire ysbrydoli (poetic etc) inspired air aer mewnanadledig inspired airs aer mewnanadledig instability ansadrwydd (of object) instability ansefydlogrwydd (of economy, society etc) install gosod (machinery, software etc) install dictionaries gosod geiriaduron installation program rhaglen osod installation programs rhaglen osod instalment rhandal instalments rhandal instant ennyd instant grip wrench tyndro gafael ebrwydd instant grip wrenches tyndro gafael ebrwydd instantaneous ebrwydd (in general) instantaneous enydaidd (in physics) instantaneous centre of rotation canol enydaidd y cylchdro instantaneous grip gafael ebrwydd instantaneous grip vice feis gafael ebrwydd instantaneous grip vices feis gafael ebrwydd instantaneous grips gafael ebrwydd instantaneous water-heater gwresogydd dŵr ebrwydd instantaneous water-heaters gwresogydd dŵr ebrwydd instants ennyd instep cefn troed insteps cefn troed instinct greddf instinctive behaviour ymddygiad greddfol instinctive behaviours ymddygiad greddfol instincts greddf institute sefydliad institute of education athrofa institute of legal executives sefydliad y gweithredwyr cyfreithlon institutes sefydliad institution sefydliad institutional sefydliadol institutional care gofal mewn sefydliad institutional cares gofal mewn sefydliad institutional determinant penderfynyn sefydliadol institutional determinants penderfynyn sefydliadol institutional discrimination gwahaniaethu sefydliadol institutional history hanes sefydliadau institutionalize sefydliadu institutions sefydliad instruction cyfarwyddyd instruction address cyfeiriad cyfarwyddyd instruction cycle cylchred gyfarwyddyd instruction cycles cylchred gyfarwyddyd instruction decoder datgodiwr cyfarwyddyd instruction decoders datgodiwr cyfarwyddyd instruction format fformat cyfarwyddyd instruction formats fformat cyfarwyddyd instruction register cofrestr gyfarwyddyd instruction registers cofrestr gyfarwyddyd instruction set set gyfarwyddiadau instruction sets set gyfarwyddiadau instruction sheet taflen gyfarwyddiadau instruction sheets taflen gyfarwyddiadau instruction word gair cyfarwyddiadol instruction words gair cyfarwyddiadol instructional programme rhaglen hyfforddi instructional programmes rhaglen hyfforddi instructions cyfarwyddyd instructor hyfforddwr instructors hyfforddwr instrument offeryn (=implement) instrument offeryn (of music) instrumental offerynnol (of music) instrumental ostinato ostinato offerynnol instrumental part rhan offerynnol instrumental parts rhan offerynnol instrumental writing ysgrifennu ar gyfer offerynnau instrumentalist offerynnwr instrumentalists offerynnwr instrumentation offeryniaeth instrumentations offeryniaeth instruments offeryn (=implement) instruments offeryn (of music) insular ynysol insulate ynysu insulated ynysedig insulating board bwrdd ynysu insulating boards bwrdd ynysu insulating material defnydd ynysu insulating materials defnydd ynysu insulation ynysiad insulations ynysiad insulator ynysydd insulators ynysydd insulin inswlin insulin-dependent diabetes mellitus diabetes mellitus dibynnol ar inswlin insulins inswlin insurance yswiriant insurance policy polisi yswiriant insurances yswiriant insure yswirio insured yswiriedig insured population poblogaeth yswiriedig insured populations poblogaeth yswiriedig insurer yswiriwr insurers yswiriwr insurrection gwrthryfel insurrections gwrthryfel intact spurs sbardunau didoriad intaglio intaglio intaglio engraving ysgythriad intaglio intaglio engravings ysgythriad intaglio intake cymeriant (of food) intake ffridd (land) intake mewnlif (flow) intake nifer a dderbynnir intake and output cymeriant ac allgynnyrch intake and outputs cymeriant ac allgynnyrch intakes cymeriant (of food) intakes ffridd (land) intakes mewnlif (flow) intakes nifer a dderbynnir intarsia intarsia intarsias intarsia integer cyfanrif integer arithmetic rhifyddeg cyfanrifau integer arithmetics rhifyddeg cyfanrifau integer value gwerth cyfanrifol integer values gwerth cyfanrifol integer variable newidyn cyfanrifol integer variables newidyn cyfanrifol integers cyfanrif integral annatod (part of something) integral cyfannol (of integer) integral integrol (of calculus) integral integryn (of calculus) integral calculus calcwlws integrol integral diagram diagram integrol integral diagrams diagram integrol integral domain parth integrol integral domains parth integrol integral multiple lluosrif cyfannol integral multiples lluosrif cyfannol integral value gwerth cyfannol integral values gwerth cyfannol integrals integryn (of calculus) integrand integrand integrands integrand integrate cyfannu (=combine into a whole or complete by the addition of parts) integrate integreiddio (=bring into equal participation) integrate integru (=find the integral of) integrate children integreiddio plant integrate society cyfannu cymdeithas integrated cyfannol (of objects) integrated integredig (of children, people) integrated circuit cylched gyfannol (IC) integrated circuits cylched gyfannol (IC) integrated course cwrs cyfannol integrated courses cwrs cyfannol integrated curriculum cwricwlwm cyfannol integrated curriculums cwricwlwm cyfannol integrated day diwrnod cyfannol integrated learning dysgu cyfannol integrated school ysgol gyfannol integrated schools ysgol gyfannol integrated studies astudiaethau cyfannol integrated support service gwasanaeth cefnogi cyfannol integrated support services gwasanaeth cefnogi cyfannol integrated syllabus maes llafur cyfannol integrated training hyfforddiant cyfannol integrated trainings hyfforddiant cyfannol integration cyfannu (of parts into a whole) integration integreiddiad integration integreiddio (of people) integration integriad (in calculus) integration by parts integru fesul rhan integration time amser integru integration times amser integru integrations integreiddiad integrations integriad (in calculus) integrative integreiddiol integrity cyfanrwydd (=wholeness) integrity unplygrwydd (=moral uprightness) integument pilyn integuments pilyn intellectual deallusol intellectual development datblygiad deallusol intellectual developments datblygiad deallusol intellectual experience profiad deallusol intellectual experiences profiad deallusol intellectual factor ffactor ddeallusol intellectual factors ffactor ddeallusol intellectual property rights hawliau eiddo deallusol intelligence deallusrwydd intelligence quotient cyniferydd deallusrwydd (I.Q.) intelligence quotients cyniferydd deallusrwydd (I.Q.) intelligence test prawf deallusrwydd intelligence tests prawf deallusrwydd intelligences deallusrwydd intelligent deallus intelligent knowledge based systems systemau deallus yn seiliedig ar wybodaeth (IKBS) intelligent terminal terfynell ddeallus intelligent terminals terfynell ddeallus intelligentsia deallusion intense angerddol (of feeling) intense dwys intense tanbaid (of light) intensity angerdd (of feeling) intensity arddwysedd (in physics) intensity tanbeidrwydd (of light) intensive arddwys (in physics) intensive care gofal dwys intensive cares gofal dwys intention bwriad intentions bwriad inter-block gap bwlch rhyngfloc inter-block gaps bwlch rhyngfloc inter-granal rhyng-granaidd interact rhyngweithio interaction rhyngweithiad interactions rhyngweithiad interactive rhyngweithiol interactive video fideo rhyngweithiol interagency work gwaith rhwng asiantaethau interagency works gwaith rhwng asiantaethau interbedded rhynghaenol interbreed rhyngfridio intercalary rhyngosodol intercede eiriol intercellular rhyng-gellol intercellular spaces gwagleoedd rhyng-gellol intercept rhyng-gipio (a ball in sport) intercept rhyng-gyfarfod (e.g. of aeroplanes) intercept rhyngdoriad (in mathematics) intercept rhyngdorri (in mathematics) interception rhyng-gipiad (of a ball in sport) interception rhyng-gyfarfyddiad (e.g. of aeroplanes) interceptions rhyng-gipiad (of a ball in sport) interceptions rhyng-gyfarfyddiad (e.g. of aeroplanes) intercepts rhyngdoriad (in mathematics) intercession eiriolaeth intercessions eiriolaeth interchange cydgyfnewid (in mathematics) interchange ymgyfnewid (of data) interchangeable cydgyfnewidiol (in mathematics) interconvertibility rhyngdrawsnewidioldeb intercorrelation rhyng-gydberthyniad intercorrelations rhyng-gydberthyniad intercostal rhyngasennol intercourse cyfathrach rywiol (sexual) intercourses cyfathrach rywiol (sexual) interdepartmental rhyngadrannol interdependence cyd-ddibyniaeth interdependences cyd-ddibyniaeth interdependent cyd-ddibynnol interdependent variable newidyn rhyngddibynnol interdependent variables newidyn rhyngddibynnol interdict gwaharddiad interdicts gwaharddiad interdrumlin rhyngdrymlinol interest budd (=advantage or profit) interest diddordeb (=concern, curiosity, pastime) interest llog (=money paid for money lent) interest area maes diddordeb interest areas maes diddordeb interest rate cyfradd llog interest rates cyfradd llog interest-getting question cwestiwn i ddenu diddordeb interest-getting questions cwestiwn i ddenu diddordeb interesting diddorol interests budd (=advantage or profit) interests diddordeb (=concern, curiosity, pastime) interests llog (=money paid for money lent) interface rhyngwyneb interface rhyngwynebu interfaces rhyngwyneb interfacial rhyngwynebol interfacing wynebyn cudd interfacings wynebyn cudd interfascicular rhyngffasgellol interference ymyrraeth (in general) interference fit ffit ymyrryd interference fits ffit ymyrryd interferences ymyrraeth (in general) interfering ymyrrol interferometer ymyradur interferometers ymyradur interferon interfferon interferons interfferon interfluve tir rhyngafonol interfluves tir rhyngafonol intergalactic rhyngalaethog interglacial rhyngrewlifol intergroup discrimination gwahaniaethu ar sail grŵp interim interim interim report adroddiad interim interim reports adroddiad interim interior mewndir (of land) interior mewndirol (of land) interior mewnol (in general) interior tu mewn (=inside) interior angle ongl fewnol interior angles ongl fewnol interior decorating addurno mewnol interior decoration addurn mewnol interior decorations addurn mewnol interior plywood pren haenog mewnol interior plywoods pren haenog mewnol interiors mewndir (of land) interiors tu mewn (=inside) interlace rhyngles interlace rhynglesio interlaces rhyngles interlining leinin cudd interlinings leinin cudd interlink cydgysylltu interlinked cydgysylltiol interlock cydgloi interlocked grain graen rhyng-gloëdig interlocked grains graen rhyng-gloëdig interlocking device dyfais gydgloëdig interlocking devices dyfais gydgloëdig interlocking spurs sbardunau pleth interlude egwyl (in a performance) interludes egwyl (in a performance) intermediary cyfryngwr intermediary compound rhyng-gyfansoddyn intermediary compounds rhyng-gyfansoddyn intermediary metabolism metabolaeth ryngol intermediary metabolisms metabolaeth ryngol intermediate canolradd (in education) intermediate rhyngolyn (in biology) intermediate area ardal lwyd (=grey area) intermediate areas ardal lwyd (=grey area) intermediate education addysg ganolradd intermediate educations addysg ganolradd intermediate goods nwyddau rhyngol intermediate layer haen ryngol intermediate layers haen ryngol intermediate school ysgol ganolradd intermediate schools ysgol ganolradd intermediate state rhyng-gyflwr (in mathematics) intermediate states rhyng-gyflwr (in mathematics) intermediates rhyngolyn (in biology) intermezzo intermezzo intermittent ysbeidiol intermittent feed porthiant ysbeidiol intermittent feeds porthiant ysbeidiol intermittent stream ffrwd ysbeidiol intermittent streams ffrwd ysbeidiol intermix cydgymysgiad intermix cydgymysgu intermixable rhyng-gymysgadwy intermixes cydgymysgiad intermixture cydgymysgedd intermixtures cydgymysgedd intermont rhyngfynyddig internal mewnol internal assessment asesu mewnol internal assessor aseswr mewnol internal assessors aseswr mewnol internal bisector hanerydd mewnol internal bisectors hanerydd mewnol internal bleeding gwaedu mewnol internal capsule cwpan mewnol internal capsules cwpan mewnol internal circlip cylchglip mewnol internal circlips cylchglip mewnol internal combustion engine peiriant tanio mewnol internal combustion engines peiriant tanio mewnol internal comfort cynhesrwydd mewnol internal comforts cynhesrwydd mewnol internal communication cyfathrebu mewnol internal degree gradd fewnol internal degrees gradd fewnol internal diameter diamedr mewnol internal diameters diamedr mewnol internal environment amgylchedd mewnol internal environments amgylchedd mewnol internal examination arholiad mewnol internal examinations arholiad mewnol internal examiner arholwr mewnol internal examiners arholwr mewnol internal fabric ffabrig mewnol internal fabrics ffabrig mewnol internal growth twf mewnol internal growths twf mewnol internal illumination golau mewnol internal illuminations golau mewnol internal inquiry ymchwiliad mewnol internal pressure gwasgedd mewnol internal pressures gwasgedd mewnol internal recruitment recriwtio mewnol internal resistance gwrthiant mewnol internal resistances gwrthiant mewnol internal respiration resbiradaeth fewnol internal respirations resbiradaeth fewnol internal secretion secretiad mewnol internal secretions secretiad mewnol internal step cam mewnol internal steps cam mewnol internal verifier dilysydd mewnol internal verifiers dilysydd mewnol internal wall wal fewnol internal walls wal fewnol internalize mewnoli international rhyngwladol international dimension dimensiwn rhyngwladol international dimensions dimensiwn rhyngwladol international ferry terminal terminws llongau fferi rhyngwladol international ferry terminals terminws llongau fferi rhyngwladol international history hanes rhyngwladol international hotel chain cadwyn ryngwladol o westai international hotel chains cadwyn ryngwladol o westai international level lefel ryngwladol international levels lefel ryngwladol international market marchnad ryngwladol international marketing marchnata rhyngwladol international markets marchnad ryngwladol international paper sizes meintiau papur rhyngwladol international relations cydberthynas y gwledydd international runner rhedwr rhyngwladol international runners rhedwr rhyngwladol international sport chwaraeon rhyngwladol international tension tensiwn rhyngwladol international tensions tensiwn rhyngwladol international trade masnach ryngwladol international trades masnach ryngwladol internationalism rhyngwladoliaeth internationalisms rhyngwladoliaeth internecine cyd-ddinistriol internet banking bancio rhyngrwyd internet connection cysylltiad rhyngrwyd internet connections cysylltiad rhyngrwyd internodal rhyngnodol internode internod internodes internod interpenetrate cydymdreiddio interpenetration cyd-dreiddiad interpenetrations cyd-dreiddiad interpersonal rhyngbersonol interpersonal communication cyfathrebu rhyngbersonol interpersonal relations cydberthynas rhwng pobl interpersonal skills sgiliau rhyngbersonol interphase rhyngwedd interphases rhyngwedd interplay cydadwaith interpolate rhyngosod interpolation rhyngosodiad interpolations rhyngosodiad interpret dehongli interpretation dehongliad interpretations dehongliad interpreted language iaith ddeongledig interpreted languages iaith ddeongledig interpreter dehonglydd (=computing program) interpreters dehonglydd (=computing program) interpretive code cod deongliadol interpretive codes cod deongliadol interquartile rhyngchwartel interquartile range amrediad rhyngchwartel interquartile ranges amrediad rhyngchwartel interquartiles rhyngchwartel interregnum interregnum interregnums interregnum interrelate cydberthyn interrelated variables newidynnau sy'n rhyngberthyn interrelationship cydberthynas interrelationships cydberthynas interrogate holi interrogatory cwestiyneb interrogatory holiadol interrupt ymyriad interrupt ymyrryd interrupt event digwyddiad ymyriadol interrupt events digwyddiad ymyriadol interrupt line lein ymyriadol interrupt lines lein ymyriadol interrupt service routine rheolwaith trin ymyriadau interrupt service routines rheolwaith trin ymyriadau interrupt trap magl ymyriadol interrupt traps magl ymyriadol interrupted cadence diweddeb annisgwyl interrupted cadences diweddeb annisgwyl interrupts ymyriad interschool competition cystadleuaeth rhwng ysgolion interschool competitions cystadleuaeth rhwng ysgolion intersect croestorri intersecting prisms prismau croestoriadol intersection croestoriad intersection of sets croestoriad setiau intersections croestoriad interspecific rhyngrywogaethol interstellar accretion ymgasgliad rhyngserol interstellar accretions ymgasgliad rhyngserol interstitial interstitaidd interstitial cells celloedd interstitaidd interstitial condensation cyddwysiad interstitaidd interstitial condensations cyddwysiad interstitaidd intertextuality rhyngdestuniaeth intertropical rhyngdrofannol intertropical front ffrynt rhyngdrofannol intertropical fronts ffrynt rhyngdrofannol interval cyfwng (in music, mathematics) interval egwyl (=break time) interval ysbaid (=intervening time) interval timer amserydd cyfwng interval timers amserydd cyfwng interval training hyfforddiant egwyl interval trainings hyfforddiant egwyl intervals cyfwng (in music, mathematics) intervals egwyl (=break time) intervals ysbaid (=intervening time) intervene ymyrryd intervening rhyngol intervention ymyriad intervention price pris ymyrrol intervention prices pris ymyrrol interventions ymyriad intervertebral disc disg rhyngfertebrol intervertebral discs disg rhyngfertebrol interview cyfweld interview cyfweliad interviewee cyfwelai interviewees cyfwelai interviewer cyfwelydd interviewers cyfwelydd interviews cyfweliad intestinal coluddol intestine coluddyn intestines coluddyn intimacy agosatrwydd into function ffwythiant i mewn into functions ffwythiant i mewn intolerance anoddefgarwch intolerances anoddefgarwch intonation rhagnod (in plainsong) intonation tonyddiaeth (of instrument or voice) intonations rhagnod (in plainsong) intonations tonyddiaeth (of instrument or voice) intone goslefu intracellular mewngellol intractable anhydrin intrada intrada intradas intrada intradermal injection pigiad mewngroenol intradermal injections pigiad mewngroenol intrados of an arch cromlin fewnol bwa intramolecular mewnfoleciwlaidd intramuscular injection pigiad mewngyhyrol intramuscular injections pigiad mewngyhyrol intranet mewnrwyd intranets mewnrwyd intransitive anhrosaidd (in mathematics) intrapleural drainage draeniad mewnblewrol intrapleural drainages draeniad mewnblewrol intraspecific mewnrhywogaethol intrauterine loop dolen fewngroth intrauterine loops dolen fewngroth intravenous mewnwythiennol intravenous infusion arllwysiad mewnwythiennol (of action) intravenous infusion trwyth mewnwythiennol (of liquid) intravenous infusions arllwysiad mewnwythiennol (of action) intravenous infusions trwyth mewnwythiennol (of liquid) intrazonal cydgylchfaol intricate cymhleth intricate pattern patrwm cymhleth intricate patterns patrwm cymhleth intricate shape ffurf gymhleth intricate shapes ffurf gymhleth intricate work gwaith cymhleth intricate works gwaith cymhleth intrigue cynllwyn intrigues cynllwyn intrinsic cynhenid intrinsic energy egni cynhenid intrinsic movement symudiad cynhenid intrinsic movements symudiad cynhenid intrinsic spin troelliad cynhenid intrinsic spins troelliad cynhenid introduce cyflwyno introduction cyflwyniad (of person to another) introduction rhagarweiniad (in music etc) introduction rhagymadrodd (=explanatory section of book) introductions cyflwyniad (of person to another) introductions rhagarweiniad (in music etc) introductions rhagymadrodd (=explanatory section of book) introductory activity gweithgaredd rhagarweiniol introvert mewnblyg intrude ymwthio intrusion mewnwthiad (of rock) intrusion ymwthiad (in general) intrusions mewnwthiad (of rock) intrusions ymwthiad (in general) intrusive mewnwthiol (of rock) intrusive rock craig fewnwthiol intrusive rocks craig fewnwthiol intubation mewndiwbio intuition greddf intuitions greddf intuitive sythweledol intuitive stage cyfnod sythweledol intuitive stages cyfnod sythweledol intuitive thought meddwl sythweledol intuitive thoughts meddwl sythweledol intuitive understanding dealltwriaeth sythweledol intuitive understandings dealltwriaeth sythweledol inundate gorlifo invade goresgyn invader goresgynnwr invaders goresgynnwr invaginate ymweinio invagination ymweiniad invaginations ymweiniad invalid annilys (of passport etc) invalid claf invalid methedig (of person) invalidate dirymu invalidity benefit budd-dal y methedig invalidity benefits budd-dal y methedig invalids claf invariant sefydlog invariant sefydlyn invariants sefydlyn invasion goresgyniad invasion game gêm goresgyn invasion games gêm goresgyn invasions goresgyniad invasive procedure gweithred fewnwthiol invasive procedures gweithred fewnwthiol invent dyfeisio invention dyfais inventions dyfais inventive dyfeisgar inventor dyfeisiwr inventors dyfeisiwr inventory rhestr eiddo inventory management rheolaeth restru inventory managements rheolaeth restru inverse gwrthdro inverse element elfen wrthdro inverse elements elfen wrthdro inverse functions ffwythiannau gwrthdro inverse matrix matrics gwrthdro inverse matrixes matrics gwrthdro inverse operation gweithrediad gwrthdro inverse operations gweithrediad gwrthdro inverse ratio cymhareb wrthdro inverse square law deddf sgwâr gwrthdro inverse square laws deddf sgwâr gwrthdro inverse variation amrywiad gwrthdro inverse variations amrywiad gwrthdro inverses gwrthdro inversion gwrthdro (in music) inversion gwrthdroad (in general) inversion of chord gwrthdro cord inversion of temperature gwrthdroad tymheredd inversions gwrthdro (in music) inversions gwrthdroad (in general) invert gwrthdroi invert level lefel wrthdro invert levels lefel wrthdro invert sugar siwgr gwrthdroëdig invert sugars siwgr gwrthdroëdig invertase infertas invertases infertas invertebral rhyngfertebrol invertebrate infertebrat invertebrates infertebrat inverted gwrthdro inverted gwrthdroedig inverted answer ateb wyneb i waered inverted answers ateb wyneb i waered inverted cone côn gwrthdro inverted cones côn gwrthdro inverted image delwedd wrthdro inverted images delwedd wrthdro inverted mordent isfordent inverted mordents isfordent inverted pleat plet wrthdro inverted pleats plet wrthdro inverted pyramid pyramid gwrthdro inverted pyramids pyramid gwrthdro inverted relief tirwedd wrthdro inverted reliefs tirwedd wrthdro inverted tuck twc gwrthdro inverted tucks twc gwrthdro inverting amplifier mwyhadur gwrthdroadol inverting amplifiers mwyhadur gwrthdroadol invertor gwrthdröydd invertors gwrthdröydd invest arwisgo (=clothe) invest buddsoddi (financial) invest gosod gwarchae (=lay siege) investigate ymchwilio investigate scientific questions ymchwilio i gwestiynau gwyddonol investigation archwiliad (medical) investigation astudiaeth (=study) investigation ymchwiliad (of crime etc) investigations archwiliad (medical) investigations astudiaeth (=study) investigations ymchwiliad (of crime etc) investigative ymchwiliol investigative geography daearyddiaeth ymchwiliol investigative method dull ymchwiliol investigative methods dull ymchwiliol investigative psychology seicoleg ymchwiliol investigative work gwaith ymchwilio investigative works gwaith ymchwilio investiture arwisgo investment arwisgiad (of power) investment buddsoddiad (of money) investment appraisal gwerthuso buddsoddiad investment casting castio patrwm aberthol investments arwisgiad (of power) investments buddsoddiad (of money) investor buddsoddwr investors buddsoddwr inviable anhyfyw invigilator goruchwyliwr invigilators goruchwyliwr invigorating bywiogus inviscid anludiog invisible cudd (=hidden) invisible earnings enillion anweledig invisible exports allforion anweledig invisible hemming hemio cudd invisible hinge colfach cudd invisible hinges colfach cudd invisible line llinell gudd invisible lines llinell gudd invisible mending cyweirio cudd invisible zip sip cudd invisible zips sip cudd invitation to treat gwahoddiad i drafod invite gwahodd invocation of saints ymbil ar y saint invoice anfoneb invoice number rhif yr anfoneb invoice numbers rhif yr anfoneb invoices anfoneb invoicing anfonebu involucre cylchamlen involucres cylchamlen involuntary anwirfoddol involuntary action gweithred anwirfoddol involuntary actions gweithred anwirfoddol involuntary muscle cyhyr anrheoledig involuntary muscles cyhyr anrheoledig involute infoliwt involute gear gêr infoliwt involute gear rack rac gêr infoliwt involute gear racks rac gêr infoliwt involute gears gêr infoliwt involutes infoliwt involution infolytedd involutions infolytedd inward mewnol inward grasp mewnafael inward grasps mewnafael inward investment buddsoddiad o'r tu allan inward investments buddsoddiad o'r tu allan inwards tuag i mewn iodine ïodin (I) iodines ïodin (I) ion ïon ion exchange resin resin cyfnewid ïonau ion exchange resins resin cyfnewid ïonau ionic ïonig ionic bond bond ïonig ionic bonds bond ïonig ionic equation hafaliad ïonig ionic equations hafaliad ïonig ionisation energy egni ïoneiddiad ionizable ïonadwy ionization ïoneiddiad ionization chamber llestr ïoneiddiad ionization chambers llestr ïoneiddiad ionizations ïoneiddiad ionize ïoneiddio ionosphere ïonosffer ionospheres ïonosffer iridium iridiwm (Ir) iridiums iridiwm (Ir) iris iris (eye) iron haearn (Fe) iron haearn smwddio (appliance) iron smwddio iron cored solenoid solenoid craidd haearn iron cored solenoids solenoid craidd haearn iron filings naddion haearn iron ion ïon haearn iron ions ïon haearn iron mould rhwd haearn iron moulds rhwd haearn iron nipping press gwasg haearn nipio iron on gwreslynu iron on interfacing wynebyn cudd gwreslyn iron ore mwyn haearn iron ores mwyn haearn iron oxide haearn ocsid iron oxides haearn ocsid iron pan cletir haearn iron pans cletir haearn iron pyrites pyrit haearn iron setting gosodiad haearn iron settings gosodiad haearn iron tubing tiwbin haearn iron tubings tiwbin haearn iron wire gwifren haearn iron wires gwifren haearn iron-cored coil coil craidd haearn iron-cored coils coil craidd haearn iron-on transfer trosglwyddyn gwreslynol iron-on transfers trosglwyddyn gwreslynol ironclad llong haearn ironclads llong haearn ironing board bwrdd smwddio ironing boards bwrdd smwddio ironing pad pad smwddio ironing pads pad smwddio ironmongery nwyddau haearn (hardware) irons haearn (Fe) irons haearn smwddio (appliance) irradiate arbelydru irradiation arbelydriad irradiations arbelydriad irrational afresymol (=unreasonable) irrational anghymarebol (in mathematics) irrational number rhif anghymarebol irrational numbers rhif anghymarebol irrecoverable error gwall anadferadwy irrecoverable errors gwall anadferadwy irredeemable diatbryn (in economics) irredeemable bonds bondiau diatbryn irredentism iredentiaeth irredentisms iredentiaeth irreducible anostyngadwy irregular afreolaidd irregular cadence diweddeb annisgwyl irregular cadences diweddeb annisgwyl irregular crust cramen afreolaidd irregular crusts cramen afreolaidd irregular solid solid afreolaidd irregular solids solid afreolaidd irregularity afreoleidd-dra irrelevant amherthnasol irreversible anghildroadwy (of reaction) irrigate dyfrhau irrigated dyfredig irrigation dyfrhad irrigation ditch ffos ddyfrhau irrigation ditches ffos ddyfrhau irrigations dyfrhad irritability sensitifedd irritation cosi poenus (of itchy skin) irrotational anghylchdro isallobar isalobar isallobars isalobar isanomalous line llinell anomaledd isanomalous lines llinell anomaledd ischaemic ischaemig (heart disease) ischium ischiwm ischiums ischiwm isentropic isentropig islet ynysig islets ynysig islets of Langherans ynysoedd Langerhans isobar isobar isobaric isobarig isobars isobar isobath isobath isobaths isobath isobathytherm isobathytherm isobathytherms isobathytherm isobront isobront isobronts isobront isochrone isocron isochrones isocron isochronous isocronus isoclinal folding plygiant isoclinol isoclinal foldings plygiant isoclinol isocline isoclin isoclines isoclin isoenzyme isoensym isoenzymes isoensym isogamy isogamedd isogeotherm isogeotherm isogeotherms isogeotherm isogloss isoglos isogon isogon isogonal isogonol isogons isogon isohaline isohalaidd isohel isohel isohels isohel isohyet glawlin isohyets glawlin isohypse cyfuchlin (contour) isohypses cyfuchlin (contour) isokinetic isocinetig isokinetic muscle contraction cyfangiad cyhyrol isocinetig isokinetic muscle contractions cyfangiad cyhyrol isocinetig isolate arunigo (a chemical) isolate neilltuo (in economics) isolate unigyn (of child) isolated arunig (of chemical) isolates unigyn (of child) isolation arwahanrwydd isolation hospital ysbyty heintiau isolation hospitals ysbyty heintiau isolation valve falf ynysu isolation valves falf ynysu isolation ward ward arwahanu isolation wards ward arwahanu isolationism ymneilltuedd isolationisms ymneilltuedd isolationist arwahanydd isolationists arwahanydd isolations arwahanrwydd isolator arunigydd isolators arunigydd isoleucine isolewcin isoleucines isolewcin isomer isomer isomerism isomeredd isomerisms isomeredd isomerization isomeru isomers isomer isometric isometrig isometric axis echelin isometrig isometric drawing lluniad isometrig isometric drawings lluniad isometrig isometric muscle contraction cyfangiad cyhyrol isometrig isometric muscle contractions cyfangiad cyhyrol isometrig isometric plane plân isometrig isometric planes plân isometrig isometric projection tafluniad isometrig isometric projections tafluniad isometrig isometric scale graddfa isometrig isometric scales graddfa isometrig isometric view golwg isometrig isometric views golwg isometrig isometry isometreg isomorphic isomorffig isomorphism isomorffedd isomorphisms isomorffedd isomorphous isomorffus isoneph isoneff isonephs isoneff isoperimetric isoperimetrig isophene isoffen isophenes isoffen isopleth isopleth isopleths isopleth isorhythmic isorhythmig isoryme rhewlin isorymes rhewlin isosceles isosgeles isosceles triangle triongl isosgeles isosceles triangles triongl isosgeles isoseismal isoseismol isoseismic isoseismig isostade isostad isostades isostad isostasy isostasi isostatic adjustment cymhwysiad isostatig isostatic adjustments cymhwysiad isostatig isostatic anomaly anomaledd isostatig isostatic equilibrium cydbwysedd isostatig isostatic equilibriums cydbwysedd isostatig isotach isotach isotaches isotach isotactic isotactig isotherm isotherm isothermal isothermal isothermals isothermal isothermic isothermig isotherms isotherm isotonic isotonig isotonicity isotonedd isotope isotop isotopes isotop isotopic isotopig isotropic surface arwyneb isotropig isotropic surfaces arwyneb isotropig isovaline isofalin isovalines isofalin issue cyhoeddi (=publish) issue dyroddi (provide) issue mater (=important topic) issue tarddiad (of a gas) issue tarddu (of a gas) issues mater (=important topic) issues tarddiad (of a gas) isthmus culdir italic italig italic alphabet gwyddor italig italic alphabets gwyddor italig italic letter llythyren italig italic letters llythyren italig italic pen pen italig italic pens pen italig italic writing pen ysgrifbin italig italic writing pens ysgrifbin italig italicize italeiddio italics italig itch cosi item eitem item bank cronfa eitemau item banks cronfa eitemau item of expenditure eitem gwariant item testing profi eitemau items eitem iterate iteru iteration iteriad iterations iteriad iterative iterus iterative method dull iterus iterative methods dull iterus iterative routine rheolwaith iterus iterative routines rheolwaith iterus iterative search chwiliad iterus iterative searches chwiliad iterus itinerant teacher athrawes deithiol (female) itinerant teacher athro teithiol (male) itinerant teachers athrawes deithiol (female) itinerant teachers athro teithiol (male) itinerary amserlen teithio ivory ifori ivory black du ifori ivory blacks du ifori ivory tower tŵr ifori ivory towers tŵr ifori ivy stem coesyn iorwg ivy stems coesyn iorwg jabot jabot jabots jabot jack jac jack jacio jack rafter ceibr byr jack rafters ceibr byr jacket siaced jackets siaced jackplane plaen jac jackplanes plaen jac jacks jac jam tagfa (of traffic etc) jamb ystlysbost jambs ystlysbost jamming cloi janizary Janisariad jap silk sidan jap jap silks sidan jap jar jar jargon jargon jargons jargon jasper maen iasbis jaspers maen iasbis jaundice clefyd melyn jaundices clefyd melyn javelin gwaywffon javelin pass pàs gwaywffon javelins gwaywffon jaw genol jaw gên jaw safn jaw plate plât safn jaw plates plât safn jawbone genogl jawbones genogl jealous cenfigennus jealousy cenfigen jeans jîns jejunum jejwnwm jejunums jejwnwm jelly jeli jelly block bloc jeli jelly blocks bloc jeli jelly medium cyfrwng jeli jelly mediums cyfrwng jeli jelly-fish sglefren fôr jelly-fishs sglefren fôr jelly-like jelïaidd jemmy bar haearn cwta (=short crowbar) jenny callipers caliperau jenni jersey defnydd jersi jet jet (of water, steam etc) jet muchudd (stone) jet engine peiriant jet jet engines peiriant jet jet stream jetlif jet streams jetlif jetty glanfa jeweller gemydd jeweller's rouge rhuddliw gemydd jeweller's rouges rhuddliw gemydd jewellers gemydd jewellery gemwaith jewellery enamel enamel gemwaith jewellery enamels enamel gemwaith jib braich fawr (of crane) jib-headed key allwedd ben-gib jig jig jig jigio jig music cerddoriaeth jig jig musics cerddoriaeth jig jig rhyme rhythm jig jig rhymes rhythm jig jig saw herclif jig saws herclif jigger jiger jiggers jiger jigsaw cut toriad herclif jigsaw cuts toriad herclif jigsaw puzzle pos jigso jigsaw puzzles pos jigso jingle tincial jingle tincialyn jingles tincialyn jingoism jingoistiaeth jingoisms jingoistiaeth jink ochrgamu job gorchwyl (=task) job gwaith (=work) job swydd (=occupation) job applicant ymgeisydd am swydd job applicants ymgeisydd am swydd job creation scheme cynllun creu gwaith job creation schemes cynllun creu gwaith job description disgrifiad swydd job descriptions disgrifiad swydd job interview cyfweliad am swydd job interviews cyfweliad am swydd job placement lleoliad mewn swydd job placements lleoliad mewn swydd job production cynhyrchu yn ôl y gwaith job related ynglŷn â'r gwaith job satisfaction bodlonrwydd swydd job satisfactions bodlonrwydd swydd job specification manyleb swydd job specifications manyleb swydd job stream llif gorchwylion job streams llif gorchwylion job turnaround gweithdroad job turnarounds gweithdroad job vacancy swydd wag jobber's drill dril jobwr jobber's drills dril jobwr jockey joci jog loncian join uniad join uno join in the worship ymuno yn yr addoliad join lace uno les join together cysylltu â'i gilydd joiner asiedydd joiner's brad hoelen saer joiner's brads hoelen saer joiners asiedydd joinery gwaith asiedydd joining stitch pwyth uno joining stitches pwyth uno joins uniad joint cymal (in body) joint cymalu (=divide into joints) joint uniad (in object) joint uniadu (=connect by joints) joint account cyfrif ar y cyd joint accounts cyfrif ar y cyd joint and several cyd ac unigol joint and several liability atebolrwydd ar y cyd ac yn unigol joint distribution function ffwythiant cyd-ddosbarthiad joint distribution functions ffwythiant cyd-ddosbarthiad joint honours degree gradd gydanrhydedd joint honours degrees gradd gydanrhydedd joint liability cydatebolrwydd joint project cywaith joint projects cywaith joint replacement amnewid cymal joint replacements amnewid cymal joint stock company cwmni cydgyfalaf joint variation cydamrywiad joint variations cydamrywiad jointed cymalog jointed arm braich gymalog jointed arms braich gymalog jointed figure ffigur cymalog jointed figures ffigur cymalog jointed leg coes gymalog jointed legs coes gymalog jointed marionette marionét cymalog jointed marionettes marionét cymalog jointed puppet pyped cymalog jointed puppets pyped cymalog joints cymal (in body) joints uniad (in object) joist dist joists dist jongleur jongleur jongleurs jongleur joule joule (J) joules joule (J) journalism newyddiaduriaeth journalisms newyddiaduriaeth journalist newyddiadurwr journalists newyddiadurwr journey taith journeyman jermon journeymans jermon joust ymryson twrnamaint jousts ymryson twrnamaint joystick ffon reoli joysticks ffon reoli jubilant gorfoleddus judge barnwr judge beirniad (in sports) judgement dyfarniad (of tribunal etc) judgement of performance barnu perfformiad judgements dyfarniad (of tribunal etc) judges barnwr judges beirniad (in sports) judges' law cyfraith llys judges' laws cyfraith llys judicature barnweiniad judicatures barnweiniad judicial cyfreithiol judicial body corff barnwriaethol judicial power pŵer barnwrol judicial powers pŵer barnwrol judicial precedent cynsail farnwrol judicial precedents cynsail farnwrol judiciary barnwriaeth jug jwg juggle jyglo juggle the ball jyglo'r bêl juggler jyglwr jugglers jyglwr jugular vein gwythïen y gwddf jugular veins gwythïen y gwddf juice sudd juices sudd jumbo print argraffu jymbo jump naid jump neidio jump ball cydnaid jump balls cydnaid jump for the ball neidio am y bêl jump instruction cyfarwyddyd neidio jump instructions cyfarwyddyd neidio jump suit siwt undarn jump suits siwt undarn jump table tabl neidiau jump tables tabl neidiau jump with a rebound naid ac adlam jumper neidiwr (of person) jumper siwmper (of garment) jumpers neidiwr (of person) jumpers siwmper (of garment) jumping pit pwll neidio jumping pits pwll neidio jumps naid junction cydiad (of pipes etc) junction cyffordd (of roads, railways) junction cymer (of rivers / glaciers) junction cyswllt (of point of joining) junction cysylltle (in physics, chemistry) junction box blwch cyswllt junction boxes blwch cyswllt junctions cydiad (of pipes etc) junctions cyffordd (of roads, railways) junctions cymer (of rivers / glaciers) junctions cyswllt (of point of joining) junctions cysylltle (in physics, chemistry) juncus brwynen jungle jyngl jungles jyngl junior counsel barrister bargyfreithiwr ieuaf junior counsel barristers bargyfreithiwr ieuaf junior hacksaw haclif fach junior hacksaws haclif fach junior school ysgol gynradd junior schools ysgol gynradd junior secondary school ysgol iau junior secondary schools ysgol iau junior stage cyfnod cynradd junior stages cyfnod cynradd junk mail llythyrau sothach junk playground maes chwarae sbwriel junk playgrounds maes chwarae sbwriel jurassic jwrasig jurisdiction awdurdodaeth jurisdictions awdurdodaeth jurisprudence cyfreitheg jurisprudences cyfreitheg jurist arbenigwr cyfreithiol jurists arbenigwr cyfreithiol juror rheithiwr juror bias scale graddfa tuedd rheithiwr juror bias scales graddfa tuedd rheithiwr jurors rheithiwr jury rheithgor jury of presentment rheithgor cyflwyno just cyfiawn (=righteous) just prin (=barely) just clear prin glirio just in time mewn union bryd just in time production cynhyrchu mewn union bryd just miss prin osgoi just war rhyfel cyfiawn just wars rhyfel cyfiawn just world hypothesis damcaniaeth byd cyfiawn justice cyfiawnder (=justness) justice ustus (=judge) justice ynad (=magistrate) justice in eyre ustus cylch justice of gaol delivery ustus gwacáu'r carcharau justice of the quorum ustus cworwm justices cyfiawnder (=justness) justices ustus (=judge) justices ynad (=magistrate) justiciar prif ustus justiciars prif ustus justiciary gweinyddwr cyfiawnder justification cyfiawnhad (in general) justification unioniad (of lines of type) justification by faith cyfiawnhad drwy ffydd justifications cyfiawnhad (in general) justifications unioniad (of lines of type) justify cyfiawnhau (in general) justify unioni (lines of type) jut ymwthio allan jute jiwt jute canvas cynfas jiwt jutes jiwt jutting ymwthiol juvenile ifanc juvenile person ifanc juvenile court llys plant juvenile courts llys plant juvenile hormone hormon ieuangedd juvenile hormones hormon ieuangedd juvenile relief tirwedd ifanc juvenile reliefs tirwedd ifanc juveniles person ifanc juvenility ieuengrwydd juxtapose cyfosod juxtaposition cyfosodiad juxtapositions cyfosodiad kaccha kaccha kacchas kaccha kale cêl kame cnwc gro kame and kettle country tirlun cnwc a thegell kame moraine marian cnwc gro kame moraines marian cnwc gro kames cnwc gro kamma kamma (= karma) kammas kamma (= karma) kangaroo rat llygoden fawr godog kangaroo rats llygoden fawr godog kaolin caolin kaolins caolin kapellmeister kapellmeister kapellmeisters kapellmeister kapok capoc kapoks capoc kapparot kapparot karre clint karrenfeld calchbalmant karrenfelds calchbalmant karres clint karst carst karstic carstig karsts carst karyotype caryoteip karyotypes caryoteip kashrut kashrut kayak caiac kayaks caiac keel cilbren keels cilbren keen edge ymyl awchlym keen edged awchlym keen edges ymyl awchlym keep gorthwr (of castle) keep fit cadw'n heini keep one's balance cadw cydbwysedd keep order cadw trefn keep records cadw cofnodion keep wicket cadw wiced keep your head high cadw eich pen yn uchel keeper cadwrydd (on magnet) keeper ceidwad (in general) keepers cadwrydd (on magnet) keepers ceidwad (in general) keepers of our peace ceidwaid yr heddwch keeps gorthwr (of castle) kelvin celfin (K) kelvins celfin (K) kemp saethflew keratin ceratin keratins ceratin kerf llifdoriad kerfs llifdoriad kernel cnewyllyn kernels cnewyllyn kerosene cerosin kerosenes cerosin kersey cersi kesh / kes kesh / kes keto- ceto- ketone ceton ketones ceton kettle hole pwll tegell kettle holes pwll tegell key agoriad (of a switch) key allwedd (in general) key allweddol key bysell (on computer or typewriter) key cai (=cay) key cywair (=system of notes) key morthwyl tiwnio (for tuning piano) key nodyn (of a musical instrument) key age oedran allweddol key ages oedran allweddol key block bloc allwedd key blocks bloc allwedd key drift drifft allwedd key drifts drifft allwedd key field maes allweddol key fields maes allweddol key objective amcan allweddol key objectives amcan allweddol key press trawiad (keyboard) key principle egwyddor allweddol key principles egwyddor allweddol key ring torch allwedd key rings torch allwedd key signature arwydd cywair key signatures arwydd cywair key stage cyfnod allweddol key stages cyfnod allweddol key string cyweirdant key strings cyweirdant key strip stribed bysell key strips stribed bysell key stroke trawiad key strokes trawiad key vocabulary geirfa allweddol key word gair allweddol key words gair allweddol key worker gweithiwr allweddol key workers gweithiwr allweddol key-seat clamp clamp sedd glo key-seat clamps clamp sedd glo key-seat milling cutter melinwr sedd glo key-seat milling cutters melinwr sedd glo keyboard allweddellau (musical instrument) keyboard bysellfwrdd (of computer) keyboard drive gyrrwr bysellfwrdd keyboard drives gyrrwr bysellfwrdd keyboard instrument offeryn allweddellau keyboard instruments offeryn allweddellau keyboard layout cynllun bysellfwrdd keyboard layouts cynllun bysellfwrdd keyboards bysellfwrdd (of computer) keyed bysellog keyed joint uniad cloëdig keyed joints uniad cloëdig keyed mitre meitr clo keyed mitre joint uniad meitr clo keyed mitre joints uniad meitr clo keyed mitres meitr clo keyed tenon tyno cloëdig keyed tenons tyno cloëdig keyhole saw llif dwll clo keyhole saws llif dwll clo keying allweddu keynote cyweirnod keynote speaker prif siaradwr keynote speakers prif siaradwr keynotes cyweirnod keypad bysellbad keypads bysellbad keypunch tyllfwrdd keypunches tyllfwrdd keystone maen clo keystones maen clo keyway allweddfa keyword allweddair keywords allweddair khamsin camsin khamsins camsin khan khan khanate khanaeth khanates khanaeth khandha khandha (Pali = skandha Sanskrit) khandhas khandha (Pali = skandha Sanskrit) khans khan khurchatovium curchatofiwm (Kh) khurchatoviums curchatofiwm (Kh) kibbutz cibwts kibbutzes cibwts kick cic kick cicio kick ahead cic ymlaen kick aheads cic ymlaen kick for touch cic am ystlys kick pleat plet gic kick pleats plet gic kick-off cic gychwyn kick-offs cic gychwyn kickback ôl-gic kickbacks ôl-gic kicker pad cicio kickers pad cicio kicking strap strap gicio kicking straps strap gicio kicks cic kickwheel olwyn gic kickwheels olwyn gic kid croen myn (type of leather) kidnap herwgipio kidney aren kidney artery rhydweli arennol kidney beans ffa Ffrengig kidney shape arennog kidney tubule tiwbyn aren kidney tubules tiwbyn aren killed spirits gwirodydd tyner killer whale morfil danheddog killer whales morfil danheddog kiln odyn kiln furniture dodrefn odyn kiln seasoning sychu mewn odyn kiln shelf silff odyn kiln shelfs silff odyn kiln-dry odyn-sych kiln-dry odyn-sychu kilns odyn kilobyte cilobeit kilobytes cilobeit kilocalorie cilocalori kilocalories cilocalori kilocycle ciloseicl kilocycles ciloseicl kilogram cilogram (kg) kilograms cilogram (kg) kilometre cilometr (km) kilometres cilometr (km) kilowatt cilowat (kW) kilowatt hour cilowat awr (kW h) kilowatt hours cilowat awr (kW h) kilowatts cilowat (kW) kilt cilt kilts cilt kin perthynas kindred carennydd kindreds carennydd kinematics cinemateg kinesthetic cinesthetig kinetic cinetig kinetic art celfyddyd ginetig kinetic arts celfyddyd ginetig kinetic energy egni cinetig kinetic energy of translation egni cinetig trawsfudiad kinetic foci ffocysau cinetig kinetic order gradd ginetig kinetic orders gradd ginetig kinetic theory of gases damcaniaeth ginetig nwyon kinetics cineteg kinetin cinetin kinetins cinetin king brenin king post roof truss cwpl brenhinbost kingdom teyrnas kingdoms teyrnas kingpost brenhinbost kingposts brenhinbost kings brenin kingship brenhiniaeth kingships brenhiniaeth kink cinc kink cincio kinks cinc kinship perthynas kinships perthynas kiosk caban kiosks caban kirtan kirtan kirtans kirtan kiss of life cusan adfer kit cit kitchen cegin kitchen foil papur arian kitchen foils papur arian kitchen paper papur cegin kitchen papers papur cegin kitchen unit uned gegin kitchen units uned gegin kitchens cegin kite barcut kites barcut knead tylino knee pen-glin knee bracket braced pen-glin knee brackets braced pen-glin knee cap padell pen-glin knee caps padell pen-glin knee joint cymal y pen-glin knee joints cymal y pen-glin knee-jerk reflex atgyrch plwc pen-glin knee-jerk reflexes atgyrch plwc pen-glin kneel penlinio kneel sitting penlinio eistedd knees pen-glin knicker nicer knickers nicer knickpoint cnicyn knickpoints cnicyn knife cyllell knife blade llafn cyllell knife blades llafn cyllell knife edge arfin (in physics, chemistry) knife edge min cyllell (in general) knife edges arfin (in physics, chemistry) knife edges min cyllell (in general) knife file ffeil cyllell knife files ffeil cyllell knife handle carn cyllell knife handles carn cyllell knife pleat plet llafn knife pleats plet llafn knife stroke strôc gyllell knife strokes strôc gyllell knife tool cyllell (of lathe tools) knife tool erfyn cyllell knife tools cyllell (of lathe tools) knife tools erfyn cyllell knife-cut veneer argaen toriad cyllell knife-cut veneers argaen toriad cyllell knifes cyllell knight marchog knight errant marchog crwydrol knight errants marchog crwydrol knight's fee ffi marchog knight's fees ffi marchog knight's service gwasanaeth marchog knight's services gwasanaeth marchog knightage corff urddau'r marchogion knightages corff urddau'r marchogion knights marchog knit gwau knit two together gwau dau bwyth ynghyd knitted carpet carped wedi'i wau knitted carpets carped wedi'i wau knitted fabric ffabrig wedi'i wau knitted fabric darn craith ffabrig wedi'i wau knitted fabric darns craith ffabrig wedi'i wau knitted fabrics ffabrig wedi'i wau knitted lace les wedi'i wau knitted laces les wedi'i wau knitted textiles tecstilau wedi'u gwau knitting instructions cyfarwyddiadau gwau knitting machine peiriant gwau knitting machines peiriant gwau knitting needle gwaell knitting needles gwaell knitwear gweuwaith knitwears gweuwaith knob bwlyn knobs bwlyn knock down taro i lawr knock inhibitor atalydd cnocio knock inhibitors atalydd cnocio knock on taro ymlaen knock on trawiad ymlaen knock ons trawiad ymlaen knockdown fittings ffitiadau datgysylltiol knockdown furniture dodrefn datgysylltiol knocked up bottom gwaelod gweflog knocked up bottoms gwaelod gweflog knocking down iron haearn fflatio knocking down irons haearn fflatio knoll cnwc knolls cnwc knot cainc (in wood) knot clymu knot cuddio ceinciau (wood) knot cwlwm knot not (=measure of speed) knots cainc (in wood) knots cwlwm knots not (=measure of speed) knotted stitch pwyth clwm knotted stitches pwyth clwm knotting cuddio ceinciau knotting cuddiwr ceinciau knottings cuddiwr ceinciau knowledge gwybodaeth knowledge base cronfa wybodaeth knowledge bases cronfa wybodaeth knowledges gwybodaeth known concentration crynodiad diffiniedig known concentrations crynodiad diffiniedig knuckle cwgn (in anatomy) knuckle cymal (=hinge) knuckle joint uniad cymal knuckle joints uniad cymal knuckle thread edau gymal knuckle threads edau gymal knuckles cwgn (in anatomy) knuckles cymal (=hinge) knurl nwrl knurled grip gafael nwrl knurled grips gafael nwrl knurled nut nyten nwrl knurled nuts nyten nwrl knurled screw sgriw nwrl knurled screws sgriw nwrl knurling nwrlio (of lathe tools) knurling tools offer nwrlio (of lathe accessories) knurls nwrl kolkhoz colchos kolkhozes colchos kosher kosher kraal cral kraals cral kraft paper papur llwyd kraft papers papur llwyd krypton crypton (Kr) kryptons crypton (Kr) kulak cwlac kulaks cwlac kurtosis cwrtosis label label label labelu labelled wedi'i labelu labelled diagram diagram wedi'i labelu labelled diagrams diagram wedi'i labelu labelling paper papur labelu labelling papers papur labelu labelling scheme cynllun labelu labelling schemes cynllun labelu labelling theory damcaniaeth labelu labels label labial gwefusol labile ansefydlog labium labiwm labiums labiwm laboratory labordy laboratory experiment arbrawf labordy laboratory experiments arbrawf labordy laboratory test prawf labordy laboratory tests prawf labordy labour esgor (=process of childbirth) labour llafur labour charge costau llafur labour force gweithlu labour forces gweithlu labour market marchnad lafur labour market failure methiant marchnad lafur labour market failures methiant marchnad lafur labour markets marchnad lafur labour pains gwewyr esgor labour pool pŵl llafur labour pools pŵl llafur labour productivity cynhyrchaeth llafur labour saving arbed llafur labour stages camau geni labour turnover trosiant llafur labour turnovers trosiant llafur labour-intensive llafur-ddwys labour-intensive production cynhyrchu llafur-ddwys labour-saving device dyfais arbed gwaith labour-saving devices dyfais arbed gwaith labourer labrwr labourers labrwr labours llafur labrum labrwm labrums labrwm labyrinth labyrinth labyrinths labyrinth laccolith lacolith laccoliths lacolith lace carrai (thong) lace les lace beading gleinwaith les lace beadings gleinwaith les lace curtains llenni les lace insertion les wedi'i fewnosod lace insertions les wedi'i fewnosod lacemaking sideru lacerated wound clwyf rhwygiad lacerated wounds clwyf rhwygiad laceration rhwygiad lacerations rhwygiad laces carrai (thong) laces les lacquer lacr lacquer lacro lacquer finish gorffeniad lacr lacquer finishs gorffeniad lacr lacquer paint paent lacr lacquer paints paent lacr lacquer solvent hydoddydd lacr lacquer solvents hydoddydd lacr lacquering lacro (in finishing metal) lacquers lacr lacrimal duct dwythell ddagrau lacrimal ducts dwythell ddagrau lacrimatory peri dagrau lactase lactas lactases lactas lactate lactad lactate llaetha lactates lactad lactation llaethiad lactation period cyfnod llaetha lactation periods cyfnod llaetha lactations llaethiad lacteal lacteal lacteals lacteal lactogenic hormone hormon lactogenig lactogenic hormones hormon lactogenig lactophenol lactoffenol lactophenols lactoffenol lactose lactos lactose intolerance anoddefgarwch lactos lactose intolerances anoddefgarwch lactos lactoses lactos lacuna ceudod lacunary bylchus lacunas ceudod lacustrine llynnol ladder rhediad (in tights) ladder ysgol (for climbing) ladder logic rhesymeg ysgol ddringo ladder logics rhesymeg ysgol ddringo ladder rung ffon ysgol ladder rungs ffon ysgol ladders rhediad (in tights) ladders ysgol (for climbing) ladies chain cadwyn y merched ladies chains cadwyn y merched ladle lletwad ladles lletwad lady's slipper orchid tegeirian esgid Fair lady's slipper orchids tegeirian esgid Fair lag lagio (=wrap up) lag oediad (of time) lag and lead dilyn ac arwain lag deposits ôl-ddyddodion lag phase cyfnod oedi (bacteria) lag phases cyfnod oedi (bacteria) laggard ymdröwr (in geography) lagged ynysedig lagging ynysydd laggings ynysydd lagoon lagŵn lagoons lagŵn lair gwâl lairs gwâl laissez-faire leader arweinydd laissez-faire laissez-faire leaders arweinydd laissez-faire laissez-faire model model laissez-faire laissez-faire models model laissez-faire laity lleygwyr lake llyn lake dwelling crannog lake dwellings crannog lake head delta delta penllyn lake head deltas delta penllyn lake plateau llwyfandir llynnoedd lake plateaus llwyfandir llynnoedd lakes llyn lakeside delta delta glanllyn lakeside deltas delta glanllyn lamb's wool mop mop gwlân oen lamb's wool mops mop gwlân oen lamina lamina (in general) lamina llafn deilen (in botany) laminar laminaidd laminar flow llif laminaidd laminar flows llif laminaidd laminarin laminarin laminarins laminarin laminas lamina (in general) laminas llafn deilen (in botany) laminate laminedig laminate laminiad laminate laminiadu laminate joint uniad laminiad laminate joints uniad laminiad laminated laminedig laminated core craidd laminedig laminated cores craidd laminedig laminates laminiad laminboard astell lafnog laminboards astell lafnog lamp lamp lamp black du lamp lamp blacks du lamp lamps lamp lampshade cysgod lamp lampshades cysgod lamp lance gwaywffon lance corporal is-gorporal lance corporals is-gorporal lancer gwaywr lancers gwaywr lances gwaywffon lancet arch bwa lanset lancet arches bwa lanset land glan (drill part) land glanio land tir land agent stiward tir land agents stiward tir land animal anifail tir land animals anifail tir land breeze awel o'r tir land breezes awel o'r tir land enclosures cau tiroedd land question pwnc y tir land questions pwnc y tir land surveyor syrfëwr tir land surveyors syrfëwr tir land tenure tirddaliadaeth land tenures tirddaliadaeth land use defnydd tir land uses defnydd tir land utilization map map defnydd tir land utilization maps map defnydd tir landed gentry bonedd landes rhostir landform tirffurf landforms tirffurf landing glanio (on land) landing pen grisiau (=top of stairs) landing area ardal lanio landing areas ardal lanio landing strip llain lanio landing strips llain lanio landings pen grisiau (=top of stairs) landlocked tirgaeedig landlord perchennog landlordism landlordiaeth landlordisms landlordiaeth landlords perchennog landmark tirnod landmarks tirnod landmass ehangdir landowner tirfeddiannwr landowners tirfeddiannwr landownership tirfeddiannaeth landownerships tirfeddiannaeth lands glan (drill part) lands tir landscape tirlun (in art) landscape tirwedd (geographical) landscape consultant ymgynghorydd tirwedd landscape consultants ymgynghorydd tirwedd landscape features nodweddion tirwedd landscape painting paentiad tirlun (of painted picture) landscape painting peintio tirlun (of process or art) landscape paintings paentiad tirlun (of painted picture) landscapes tirlun (in art) landscapes tirwedd (geographical) landslide tirlithriad landslides tirlithriad landward tua'r tir lane lôn lanes lôn langar langar langars langar language iaith language ability gallu ieithyddol language centre canolfan iaith language centres canolfan iaith language development datblygiad iaith language developments datblygiad iaith language disorder anhwylder iaith language disorders anhwylder iaith language experience profiad iaith language experiences profiad iaith language formation ffurfiad iaith language formations ffurfiad iaith language interaction rhyngweithiad iaith language interactions rhyngweithiad iaith language laboratory labordy iaith language learning dysgu iaith language learnings dysgu iaith language of art iaith weledol celf language skills sgiliau iaith language test prawf iaith language tests prawf iaith languages iaith lantern llusern lanterns llusern lanthanum lanthanwm (La) lanthanums lanthanwm (La) lap lap lap lapio lap scorer rhifwr lapiau lap scorers rhifwr lapiau lap seam sêm lap lap seams sêm lap lapel llabed lapel badge bathodyn lapél lapel badges bathodyn lapél lapels llabed lapiaz calchbalmant lapiazes calchbalmant lapidary lapidari lapie clint lapies clint lapilli lapili lapillis lapili lapis blue glas lapis (enamelling colour) lapis blues glas lapis (enamelling colour) lapped butt joint goruniad bôn ac ysgwydd lapped butt joints goruniad bôn ac ysgwydd lapped dovetail joint goruniad cynffonnog lapped dovetail joints goruniad cynffonnog lapped joint goruniad lapped joints goruniad lapped seam sêm drosblyg lapped seams sêm drosblyg lapping goruniad lapping cane gwialen blethu lapping canes gwialen blethu lapping line llinell goruniad lapping lines llinell goruniad lappings goruniad lapse rate cyfradd newid lapse rates cyfradd newid laptop gliniadur (computer) laptops gliniadur (computer) larceny lladrad lard bloneg lard blonegu lard oil olew lard lard oils olew lard lards bloneg large apparatus offer mawr large cabbage white glöyn gwyn mawr large cabbage whites glöyn gwyn mawr large court cwrt mawr large courts cwrt mawr large face milling cutter melinwr wyneb mawr large face milling cutters melinwr wyneb mawr large intestine coluddyn mawr large intestines coluddyn mawr large print book llyfr print bras large print books llyfr print bras large scale graddfa fawr large scale integration cyfannu graddfa eang (LSI) large scales graddfa fawr large triangle triongl mawr large triangles triongl mawr large-scale ar raddfa fawr large-scale production cynhyrchu ar raddfa fawr larva larfa larvas larfa larynx laryncs larynxes laryncs laser laser laser alignment equipment offer alinio gyda laser laser beam pelydr laser laser beams pelydr laser laser printer argraffydd laser laser printers argraffydd laser laser scanner sganiwr laser laser scanners sganiwr laser laser store storfa laser laser stores storfa laser lasers laser last Ice Age Oes Iâ ddiwethaf last in-first out olaf i mewn-cyntaf allan (LIFO) last in-first outs olaf i mewn-cyntaf allan (LIFO) last step cam olaf last steps cam olaf latch clicied latches clicied late adolescence llencyndod hwyr late adolescences llencyndod hwyr late adopter mabwysiadwr hwyr late adopters mabwysiadwr hwyr late cut toriad hwyr late cuts toriad hwyr late developer datblygwr hwyr late developers datblygwr hwyr late development datblygiad diweddar late developments datblygiad diweddar late maturity aeddfedrwydd diweddar latecomer hwyrddyfodiad latecomers hwyrddyfodiad latency cuddni latent cudd latent heat gwres cudd latent heat capacity cynhwysedd gwres cudd latent heat of fusion gwres cudd ymdoddi latent heat of vaporization gwres cudd anweddu latent heats gwres cudd latent period cyfnod diddigwydd (nerve / muscle) latent periods cyfnod diddigwydd (nerve / muscle) lateral ochrol lateral adjustment cymhwysiad ochrol lateral adjustment lever lifer cymhwyso ochrol lateral adjustment levers lifer cymhwyso ochrol lateral adjustments cymhwysiad ochrol lateral bud blaguryn ochrol lateral buds blaguryn ochrol lateral dominance trechedd ochrol lateral dominances trechedd ochrol lateral exercise ymarfer ochrol lateral exercises ymarfer ochrol lateral force grym ochrol lateral forces grym ochrol lateral hazard llestair ochrol lateral hazards llestair ochrol lateral inversion gwrthdroad ochrol lateral inversions gwrthdroad ochrol lateral joint uniad ochrol lateral joints uniad ochrol lateral line llinell ochrol lateral lines llinell ochrol lateral moraine marian ochrol lateral moraines marian ochrol lateral root gwreiddyn ochrol lateral roots gwreiddyn ochrol lateral surfaces arwynebau ochrol lateral view ochrolwg lateral views ochrolwg laterite laterit laterites laterit lateritic lateritig laterization latereiddio laterized latereiddiedig latex latecs latex mould mowld latecs latex moulds mowld latecs latexes latecs lath latsen lathe turn lathe accessories cyfarpar turn lathe centre canol turn lathe centres canol turn lathe chisel cŷn turnio lathe chisels cŷn turnio lathe gouge gaing gau turn lathe gouges gaing gau turn lathe parts rhannau'r turn lathe saddle cyfrwy turn lathe saddles cyfrwy turn lathe tools offer turn lather seboni lather trochion sebon lather stabilizer sefydlogydd trochion lather stabilizers sefydlogydd trochion lathes turn lathework gwaith turn latheworks gwaith turn laths latsen latitude lledred latitudes lledred latitudinarian eang-gredwr latitudinarianism eang-grededd latitudinarianisms eang-grededd latitudinarians eang-gredwr lattice dellten lattice breaking enthalpy enthalpi torri dellt lattice energy egni dellt lattice formation ffurfiant dellt lattice formations ffurfiant dellt lattice space gofod dellt lattice spaces gofod dellt lattice work delltwaith lattice works delltwaith lattices dellten latus-rectum latws-rectwm latus-rectums latws-rectwm laudanum lodnwm laudanums lodnwm lauds moliannau launch cychwyn (an attack) launch lansio (a boat) launder golchi a smwddio launderette golchfa launderettes golchfa laundress golchwraig laundry golchdy laundry appliances offer golchwaith lava lafa lava block bloc lafa lava blocks bloc lafa lava cone côn lafa lava cones côn lafa lava flow llif lafa lava flows llif lafa lava outflow gorlif lafa lava outflows gorlif lafa lava spine nodwydd lafa lava spines nodwydd lafa lavant lafant lavants lafant lavas lafa lavatory brush brwsh tŷ bach lavatory brushs brwsh tŷ bach lavender blue glas lafant (enamelling colour) lavender blues glas lafant (enamelling colour) law cyfraith (as a system) law deddf (=a single law) law and order cyfraith a threfn law book llyfr y gyfraith law books llyfr y gyfraith law code cod cyfraith law codes cod cyfraith law of absorption deddf amsugniad law of complementation deddf gyflenwadol law of conservation of mass deddf cadwraeth màs law of constant composition deddf cyfansoddiad cyson law of diminishing returns deddf adenillion lleihaol law of gravitation deddf disgyrchiant law of gravity deddf disgyrchiant law of mass action deddf adweithio masau law of multiple motions deddf mudiannau lluosol law of multiple proportions deddf cyfraneddau lluosol law of retail gravitation deddf disgyrchiant adwerthol law of succession cyfraith etifeddu law reform diwygio'r gyfraith lawbreaking torcyfraith lawbreakings torcyfraith lawday diwrnod llys barn lawful cyfreithlon lawgiver deddfroddwr lawgivers deddfroddwr lawn lawnt lawn cotton cotwm main lawn cottons cotwm main lawning rhidyllu lawns lawnt lawrencium lawrenciwm (Lr) lawrenciums lawrenciwm (Lr) laxative carthydd laxatives carthydd lay cân lay gosod (table) lay lleyg lay brother brawd lleyg lay brothers brawd lleyg lay figure ffigur gosod lay figures ffigur gosod lay out a pattern gosod patrwm lay-in mewn-osod layback ôl-gripian layer haen layer haenu layer colouring haenliwio layered structure adeiledd haenog layered structures adeiledd haenog layers haen layette layette layettes layette laying up gosod haenau laying-on rhagliwio (of colour) layman lleygwr laymans lleygwr layout dyluniad (=design) layout gosodiad (of page) layout feature nodwedd gosodiad layout features nodwedd gosodiad layout grid grid cynllun layout grids grid cynllun layouts dyluniad (=design) layouts gosodiad (of page) lazy daisy stitch pwyth llygad y dydd lazy daisy stitches pwyth llygad y dydd lazy eye llygad diog lazy eyes llygad diog leach trwytholchi leaching trwytholchiad leachings trwytholchiad lead arwain (=guide) lead blaenu (in orchestra) lead lid (electrical) lead plwm (Pb) lead blocks blociau plwm lead body corff arweiniol lead bronze efydd plwm lead bronzes efydd plwm lead bush bwsh plwm lead bushs bwsh plwm lead down arwain i lawr lead flashing lapiad plwm lead flashings lapiad plwm lead glaze gwydredd plwm lead glazes gwydredd plwm lead paragraph paragraff agoriadol lead paragraphs paragraff agoriadol lead professional officer swyddog proffesiynol arweiniol lead professional officers swyddog proffesiynol arweiniol lead screw sgriw dywys (lathe part) lead screw bearing beryn sgriw dywys lead screw bearings beryn sgriw dywys lead screws sgriw dywys (lathe part) lead sculpture cerflunwaith plwm lead sculptures cerflunwaith plwm lead solder sodr plwm lead solders sodr plwm lead story prif stori lead teacher athrawes arweiniol (female) lead teacher athro arweiniol (male) lead teachers athrawes arweiniol (female) lead teachers athro arweiniol (male) lead up arwain i fyny lead-free di-blwm leaded window ffenestr blwm leaded windows ffenestr blwm leader arweinydd (in general) leader blaenwr (in orchestra) leaders arweinydd (in general) leaders blaenwr (in orchestra) leadership arweinyddiaeth leaderships arweinyddiaeth leading edge blaenymyl leading leg coes flaen leading legs coes flaen leading seventh seithfed arweiniol leading sevenths seithfed arweiniol leading tray hambwrdd gosod (mosaics) leads lid (electrical) leads plwm (Pb) leaf dalen (of paper) leaf deilen (of plant) leaf green gwyrdd y ddeilen leaf greens gwyrdd y ddeilen leaf mosaic mosaig dail leaf mosaics mosaig dail leaf node cwgn deilen leaf nodes cwgn deilen leaf print print deilen leaf prints print deilen leaf scar craith deilen leaf scars craith deilen leaf shaped arrowhead pen saeth ar ffurf deilen leaf shaped arrowheads pen saeth ar ffurf deilen leaf stitch pwyth deilen leaf stitches pwyth deilen leaf trace deildres leaf traces deildres leaf-eating insects pryfed deilysol leaflet deiliosen (=small leaf) leaflet taflen (of paper) leaflet cover clawr taflen leaflet covers clawr taflen leaflets deiliosen (=small leaf) leaflets taflen (of paper) leafs dalen (of paper) leafs deilen (of plant) leafy deiliog leafy shoot brigyn deiliog leafy shoots brigyn deiliog league cynghrair league table tabl cynghrair league tables tabl cynghrair leagues cynghrair leakage current cerrynt gollwng leakage currents cerrynt gollwng lean gwyro lean meat cig coch lean meats cig coch lean paint paent tenau lean paints paent tenau lean pigment pigment tenau lean pigments pigment tenau lean production cynhyrchu main lean-to roof to ar oledd lean-to roofs to ar oledd leap llam leap llamu leap frog llam llyffant leap frogs llam llyffant leap year blwyddyn naid leap years blwyddyn naid leaps llam learn dysgu learner dysgwr learners dysgwr learning dysg learning centre canolfan dysgu learning centres canolfan dysgu learning difficulty anhawster dysgu learning disability anabledd dysgu learning materials deunyddiau dysgu learning method dull dysgu learning methods dull dysgu learning plateau gwastad dysgu learning plateaus gwastad dysgu learning resource adnodd dysgu learning resources adnodd dysgu learning style arddull dysgu learning styles arddull dysgu learnings dysg lease prydles lease rhentu ar brydles leased line connection cysylltiad llinell ar log leased line connections cysylltiad llinell ar log leasehold prydlesol leasehold reform diwygio cyfraith prydlesi leaseholder prydleswr leaseholders prydleswr leases prydles least lleiaf least significant bit did lleiaf arwyddocaol (LSB) least significant bits did lleiaf arwyddocaol (LSB) least square line llinell sgwariau lleiaf least square lines llinell sgwariau lleiaf least-squares estimate amcangyfrif swm lleiaf sgwariau least-squares estimates amcangyfrif swm lleiaf sgwariau leather lledr leather apron ffedog ledr leather aprons ffedog ledr leather ball pêl ledr leather balls pêl ledr leather cloth lliain lledr leather cloths lliain lledr leather hammer morthwyl lledr leather hammers morthwyl lledr leather joint cymal lledr leather joints cymal lledr leather mallet gordd ledr leather mallets gordd ledr leather needle nodwydd lledr leather needles nodwydd lledr leather punch tyllydd lledr leather punches tyllydd lledr leather thong carrai ledr leather thongs carrai ledr leather washer wasier ledr leather washers wasier ledr leather webbing webin lledr leather webbings webin lledr leathers lledr lecithin lecithin lecithins lecithin lectern darllenfa lecterns darllenfa lectionary llithlyfr lecture darlith lecture theatre darlithfa lecture theatres darlithfa lecturer darlithydd lecturers darlithydd lectures darlith ledge ysgafell ledged and braced ysgafellog a chleddog ledged door drws ysgafellog ledged doors drws ysgafellog ledger cyfriflyfr (in accounting) ledger planc (=plank) ledger polyn llorwedd (in scaffolding) ledger line llinell estyn ledger lines llinell estyn ledgers cyfriflyfr (in accounting) ledgers planc (=plank) ledgers polyn llorwedd (in scaffolding) ledges ysgafell lee boards byrddau'r tu clytaf lee side of ice ochr wrthrew leech gelen leeches gelen leeward cysgodol leeward side ochr gysgodol leeward sides ochr gysgodol left chwith left arm bowling bowlio braich chwith left court cwrt chwith left courts cwrt chwith left cross chwith draws left eye llygad chwith left eyes llygad chwith left foot troed chwith left foots troed chwith left hand llaw chwith left hands llaw chwith left outfielder ffildiwr chwith left outfielders ffildiwr chwith left over food bwyd dros ben left pedal pedal chwith left pedals pedal chwith left shift syfliad chwith left shifts syfliad chwith left side ochr chwith left side of the court ochr chwith y cwrt left sides ochr chwith left wing asgell chwith (in sport) left wings asgell chwith (in sport) left-half hanerwr chwith left-halfs hanerwr chwith left-hand lock clo llaw chwith left-hand locks clo llaw chwith left-hand screw sgriw llaw chwith left-hand screw thread edau sgriw llaw chwith left-hand screw threads edau sgriw llaw chwith left-hand screws sgriw llaw chwith left-hand side ochr chwith left-hand sides ochr chwith left-hand thread edau llaw chwith left-hand threads edau llaw chwith left-hand tools offer llaw chwith left-hand turn tro chwith left-hand turns tro chwith left-handed llawchwith left-handed batsman batiwr llaw chwith left-handed batsmans batiwr llaw chwith leg coes leg and rail construction adeiladwaith coes a rheilen leg and rail constructions adeiladwaith coes a rheilen leg before wicket coes o flaen wiced (l.b.w.) leg break bowling troi o'r goes leg bye heibiad coes leg byes heibiad coes leg glance cyffyrddiad coes leg glances cyffyrddiad coes leg of mutton sleeve llawes goes dafad leg side ochr goes leg sides ochr goes leg slip slip coes leg slips slip coes leg stump stwmp coes leg stumps stwmp coes leg vice feis goes leg vices feis goes leg-break troelliad ochr goes leg-breaks troelliad ochr goes legacy cymynrodd (=sum or article bequeathed) legacy etifeddiaeth (=inheritance) legal cyfreithiol legal aid cymorth cyfreithiol legal aids cymorth cyfreithiol legal capacity gallu cyfreithiol legal consequences goblygiadau cyfreithiol legal constraint cyfyngiad cyfreithiol legal constraints cyfyngiad cyfreithiol legal history hanes cyfraith legal liability atebolrwydd cyfreithiol legal position safbwynt cyfreithiol legal positions safbwynt cyfreithiol legal system system gyfreithiol legal systems system gyfreithiol legalism cyfreithyddiaeth legalisms cyfreithyddiaeth legality cyfreithlondeb legally binding cyfreithiol-rwym legate legad legates legad legend chwedl legends chwedl legibility darllenadwyaeth legible darllenadwy legion lleng legions lleng legislate deddfu legislation deddfwriaeth legislation for the construction project deddfwriaeth i'r project adeiladu legislations deddfwriaeth legislative assembly cynulliad deddfu legislative body corff deddfwriaethol legislator deddfwr legislators deddfwr legislature corff deddfwriaethol (=legislative body) legislature corff o ddeddfau (=body of laws) legislature senedd (=parliament) legislatures corff deddfwriaethol (=legislative body) legislatures corff o ddeddfau (=body of laws) legislatures senedd (=parliament) legitimacy cyfreithlondeb legitimate cyfreithlon legitimism cyfreithloniaeth legitimisms cyfreithloniaeth legitimist cyfreithlonydd legitimists cyfreithlonydd legume codlys legumes codlys leguminous codlysol legwarmers legins gweu leisure hamdden leisure and recreation hamdden ac adloniant leisure and recreation facility cyfleuster hamdden ac adloniant leisure and tourism hamdden a thwristiaeth leisure centre canolfan hamdden leisure centres canolfan hamdden leisure clothes dillad hamdden leisure time amser hamdden leisure times amser hamdden leisures hamdden lemiscate loop dolen lemnisgat lemiscate loops dolen lemnisgat lemma lema lemmas lema lemming leming lemmings leming lemon lemon lemon curd ceuled lemon lemon curds ceuled lemon lemons lemon lend-lease les-fenthyg lend-leases les-fenthyg lending rate cyfradd fenthyg lending rates cyfradd fenthyg length hyd length pwythyn (of thread) lengthen estyn lengthen llaesu (skirt etc) lengthen ymestyn lengthen a pattern estyn patrwm lengthening bars barrau ymestyn lengths hyd lengths pwythyn (of thread) lengthwise yn ei hyd lens power nerth lens (dioptre) lens powers nerth lens (dioptre) lenticel lenticel lenticel lenticelaidd lenticels lenticel lenticular lensaidd leptokurtic leptocwrtig leptotene leptoten leptotenes leptoten lesbian lesbiad lesbians lesbiad lesion nam lesions nam less economically developed countries gwledydd llai economaidd ddatblygedig (LEDCs) lessee prydleswr lessees prydleswr lesser spoken language iaith lai arferedig lesser spoken languages iaith lai arferedig lesson cyfres (=suite) lesson gwers (=instruction) lesson observation arsylwi gwersi lesson plan cynllun gwers lesson plans cynllun gwers lessons cyfres (=suite) lessons gwers (=instruction) let gosod (house) lethal marwol lethal gene genyn marwol lethal genes genyn marwol lethargic swrth letraset letraset letrasets letraset letter llythyr (=correspondence) letter llythyren (of alphabet) letter coordinates cyfesurynnau llythrennau letter plate plât llythyrau letter plates plât llythyrau lettering llythreniad lettering llythrennu lettering brush brwsh llythrennu lettering brushs brwsh llythrennu lettering chalk sialc llythrennu lettering chalks sialc llythrennu lettering nib nib llythrennu lettering nibs nib llythrennu lettering paper papur llythrennu lettering papers papur llythrennu lettering pen pen llythrennu lettering pencil pensil llythrennu lettering pencils pensil llythrennu lettering pens pen llythrennu lettering quill cwilsen lythrennu lettering quills cwilsen lythrennu lettering work gwaith llythrennu lettering works gwaith llythrennu letterings llythreniad letters llythyr (=correspondence) letters llythyren (of alphabet) letters of denizenship llythyrau dinasyddiaeth leucine lewcin leucines lewcin leucocyte lewcocyt leucocyte count cyfrifiad lewcocytau leucocyte counts cyfrifiad lewcocytau leucocytes lewcocyt leucoplast lewcoplast leucoplasts lewcoplast levee llifglawdd levees llifglawdd level gwastad level lefel level lefelu level bedded rocks creigiau llorhaenol level crossing croesfan wastad level crossings croesfan wastad level description disgrifiad lefel level descriptions disgrifiad lefel level of attainment lefel cyrhaeddiad level of difficulty lefel anhawster level over trosoli leveller lefelaidd levels lefel levels of demand lefelau'r galw levels of dental decay lefelau o bydredd dannedd levels of skill lefelau o fedrusrwydd lever lifer lever bar trosolfar lever bars trosolfar lever cap cap trosoli lever caps cap trosoli lever system system liferi lever systems system liferi lever tools offer trosoli lever-frame fretsaw llif ffret lifer lever-frame fretsaws llif ffret lifer leverage trosoledd (principle of) leverage trosoliad (act of) leverages trosoledd (principle of) leverages trosoliad (act of) levers lifer levy ardoll (in finance) levy treth (in general) levy rates codi trethi lexical geiriadurol lexical analysis dadansoddiad geiriadurol lexicographic geiriadurol ley gwndwn ley farming ffermio gwndwn liability atebolrwydd liana liana lianas liana libel enllib libels enllib liberal rhyddfrydwr liberal Tory Tori rhyddfrydol liberal Toryism Torïaeth ryddfrydol liberal democrat democrat rhyddfrydol liberal democrat democrataidd rhyddfrydol liberal democrats democrat rhyddfrydol liberal empire ymerodraeth ryddfrydol liberal empires ymerodraeth ryddfrydol liberalisation rhyddfrydoli liberalism rhyddfrydiaeth liberalisms rhyddfrydiaeth liberals rhyddfrydwr liberate rhyddhau liberation rhyddhad liberation theology diwinyddiaeth rhyddhad liberations rhyddhad liberator rhyddhäwr liberators rhyddhäwr libertarian rhyddewyllyswr libertarians rhyddewyllyswr liberty libart (=domain or property) liberty rhyddid (=freedom) liberty of conscience rhyddid cydwybod libido libido librarian llyfrgellydd librarians llyfrgellydd library llyfrgell library program rhaglen lyfrgell library programs rhaglen lyfrgell library resource centre canolfan adnoddau llyfrgell library resource centres canolfan adnoddau llyfrgell library routine rheolwaith llyfrgell library routines rheolwaith llyfrgell library sub-routine is-reolwaith llyfrgell library sub-routines is-reolwaith llyfrgell libration mantoliad librations mantoliad librettist libretydd librettists libretydd libretto libreto lice llau licence penrhyddid (=absolute freedom) licence rhyddid (=freedom) licence trwydded (=permit) licenced premises tŷ trwyddedig licences penrhyddid (=absolute freedom) licences rhyddid (=freedom) licences trwydded (=permit) lichen cen lichenometry cenfetreg lichens cen lid clawr lido traeth ymdrochi lie gorweddiad liege-lord uwch-arglwydd liege-lords uwch-arglwydd lieutenant is-gapten lieutenant governor dirprwy lywodraethwr lieutenant governors dirprwy lywodraethwr lieutenant-colonel is-gyrnol lieutenant-colonels is-gyrnol lieutenant-general is-gadfridog lieutenant-generals is-gadfridog lieutenants is-gapten life after death bywyd ar ôl marwolaeth life after deaths bywyd ar ôl marwolaeth life assurance aswiriant bywyd life assurances aswiriant bywyd life crisis argyfwng bywyd life cycle cylchred bywyd (in biology) life cycle cylchred oes (in economics) life cycles cylchred bywyd (in biology) life cycles cylchred oes (in economics) life drawing bywluniad life drawings bywluniad life expectancy disgwyliad oes life experiences profiadau bywyd life insurance yswiriant bywyd life insurances yswiriant bywyd life jacket siaced achub life jackets siaced achub life process proses bywyd life skills sgiliau byw life span rhychwant oes life span experiment arbrawf goroesi life span experiments arbrawf goroesi life spans rhychwant oes life stage cam bywyd life stages cam bywyd life-peer arglwydd am oes life-peers arglwydd am oes life-saving achub bywyd life-saving leg kick cic achub bywyd life-saving leg kicks cic achub bywyd life-sentence dedfryd am oes life-sentences dedfryd am oes life-size gwir faint life-size proportion cyfrannedd maint iawn life-size proportions cyfrannedd maint iawn life-sizes gwir faint lifelike real lifestyle ffordd o fyw lifestyle factors affecting health ffactor ffordd o fyw sy'n effeithio ar iechyd lifestyle factors affecting healths ffactor ffordd o fyw sy'n effeithio ar iechyd lifestyles ffordd o fyw lifetime hyd oes lifetimes hyd oes lift codi lift codiad lift pump pwmp codi lift pumps pwmp codi lift the body codi'r corff lifting tongs gefel godi lifts codiad ligado ligado ligament gewyn ligamentous gewynnol ligaments gewyn ligand ligand ligands ligand ligation clymu ligature cwlwm (in general) ligature cysylltnod (in plainsong) ligature rhwymyn (for clarinet) ligatures cwlwm (in general) ligatures cysylltnod (in plainsong) ligatures rhwymyn (for clarinet) light golau (=illumination) light golau (in colour) light goleuni (=natural agent that stimulates sight) light goleuo (=illuminate) light ysgafn (of weight) light and shade tywyll a golau light breeze awel ysgafn light breezes awel ysgafn light brown brown golau (enamelling colour) light browns brown golau (enamelling colour) light colour lliw golau light colours lliw golau light damping gwanychiad ysgafn light dampings gwanychiad ysgafn light duty detergent glanedydd ysgafn light duty detergents glanedydd ysgafn light fast pigment pigment golau anniflan light fast pigments pigment golau anniflan light fittings ffitiadau goleuo light heavy weight pwysau go drwm light industry diwydiant ysgafn light microscope microsgop golau light microscopes microsgop golau light oil olew tenau light oils olew tenau light opera opera ysgafn light operas opera ysgafn light pen pen golau light pens pen golau light plastic ball pêl blastig ysgafn light plastic balls pêl blastig ysgafn light pulley pwli ysgafn light racket raced ysgafn light rackets raced ysgafn light reaction adwaith golau light reactions adwaith golau light red coch golau light reds coch golau light ruby rhuddgoch golau (enamelling colour) light source ffynhonnell goleuni light sources ffynhonnell goleuni light straw melyn golau (tempering colour) light straws melyn golau (tempering colour) light string llinyn ysgafn light strings llinyn ysgafn light tone tôn golau (of colour) light tones tôn golau (of colour) light turning turnio ysgafn (of lathe tools) light weight pwysau ysgafn light year blwyddyn golau light years blwyddyn golau light-chaser effect effaith erlid-golau light-chaser effects effaith erlid-golau light-dependent golau-ddibynnol light-dependent resistor gwrthydd goleuni-ddibynnol (LDR) light-dependent resistors gwrthydd goleuni-ddibynnol (LDR) light-independent golau-annibynnol light-sensitive cell cell oleusensitif light-sensitive cells cell oleusensitif lightening ysgafnhad (of weight) lightenings ysgafnhad (of weight) lighthouse goleudy lighthouse in use and disused goleudy yn gweithio, yn segur lighthouses goleudy lights golau (=illumination) lights goleuni (=natural agent that stimulates sight) lightship goleulong lightships goleulong lightweight ysgafn ligneous lignaidd lignification ligneiddiad lignifications ligneiddiad lignify ligneiddio lignin lignin lignins lignin lignite lignit lignites lignit like charge gwefr debyg like charges gwefr debyg likelihood tebygoliaeth likelihoods tebygoliaeth likely tebygol limb aelod (of body) limb braich (of cross) limb ystlys (structural) limbs aelod (of body) limbs braich (of cross) limbs ystlys (structural) lime calch lime deficiency prinder calch lime deficient prin o galch lime kiln odyn galch lime kilns odyn galch lime soap sebon calch lime soaps sebon calch lime water dŵr calch lime waters dŵr calch limepan cletir calch limepans cletir calch limes calch limestone calchfaen limestone kiln odyn galch limestone kilns odyn galch limestone pavement calchbalmant limestone pavements calchbalmant limestone pillar calchbost limestone pillars calchbost limestones calchfaen liminal trothwyol liming calchu limit cyfyngiad (on numbers etc) limit cyfyngu limit terfan (in physics and mathematics) limit terfyn (=boundary) limit gauge medrydd terfan limit gauges medrydd terfan limit of elasticity terfan elastigedd limit of proportionality terfan gyfrannol limit of tolerance terfan goddefiant limit on entry cyfyngiad ar gofnod (in electronic records) limit pricing prisio cyfyngol limitation cyfyngiad limitations cyfyngiad limitations of the method cyfyngiadau'r dull limited cyfyngedig limited company cwmni cyfyngedig (ltd.) limited liability atebolrwydd cyfyngedig limited movement symudiad cyfyngedig limited movements symudiad cyfyngedig limited vocal range cwmpas lleisiol cyfyngedig limited vocal ranges cwmpas lleisiol cyfyngedig limiting cyfyngol (in general) limiting terfannol (in physics and mathematics) limiting case achos terfannol limiting cases achos terfannol limiting conditions amodau cyfyngol limiting density dwysedd terfannol limiting factor ffactor gyfyngol limiting factors ffactor gyfyngol limits cyfyngiad (on numbers etc) limits terfan (in physics and mathematics) limits terfyn (=boundary) limits of visibility terfannau gwelediad limnology llynoleg limonite limonit limonites limonit limp cloffni limp llipa (=not stiff or firm) limps cloffni line lein (for railway, clothes etc) line llinell (=mark on a surface) line rhes (=row) line absorption spectrum sbectrwm amsugno llinell line absorption spectrums sbectrwm amsugno llinell line and wash llinell a golchiad line engraving ysgythriad llinell line engravings ysgythriad llinell line feed character nod llin-borthiad line feed characters nod llin-borthiad line feed key llinborthwr line filament lamp lamp ffilament llinell line filament lamps lamp ffilament llinell line fill llanw llinell line graph graff llinell line graphs graff llinell line in the rhyme llinell rhigwm line manager rheolwr llinell line managers rheolwr llinell line of best fit llinell ffit orau line of descent llinach line of enquiry trywydd ymholi line of force llinell grym line of intersection llinell croestoriad line of regression llinell atchwel line of symmetry llinell cymesuredd line of the ball llwybr y bêl line of the stump llwybr y stwmp line of the wicket llwybr y wiced line out lein line outs lein line printer llin-argraffydd line printers llin-argraffydd line space llinell gwagle line spaces llinell gwagle line spacing bylchiad llinellau line spacings bylchiad llinellau line spectrum sbectrwm llinell line spectrums sbectrwm llinell line stitch pwyth llinell line stitches pwyth llinell line under the stave gorlinell line under the staves gorlinell line up unioni (print, pictures etc) lineage llinach lineages llinach linear llinellog (=consisting of lines) linear llinol (involving one dimension only) linear composition cyfansoddiad llinol linear compositions cyfansoddiad llinol linear counterpoint gwrthbwynt llinellog linear counterpoints gwrthbwynt llinellog linear dependence dibyniaeth linol linear dependences dibyniaeth linol linear equation hafaliad llinol linear equations hafaliad llinol linear factor ffactor linol linear factors ffactor linol linear flow llif llinol linear flows llif llinol linear independence annibyniaeth linol linear independences annibyniaeth linol linear materials defnyddiau llinol linear measurement mesuriadau llinol linear momentum momentwm llinol linear momentums momentwm llinol linear motion mudiant llinol linear motions mudiant llinol linear movement symudiad llinol linear movements symudiad llinol linear narrative stori linellol linear narratives stori linellol linear programming rhaglennu llinol linear regression atchwel llinol linear regressions atchwel llinol linear velocity cyflymder llinol linearity llinoledd linearly dependent llinol ddibynnol linearly independent llinol annibynnol lined in wedi'i leinio lined pocket poced wedi'i leinio lined pockets poced wedi'i leinio lined yoke iau â leinin lined yokes iau â leinin linen lliain linen basket basged ddillad linen baskets basged ddillad linen button botwm lliain linen buttons botwm lliain linen fold lliein-blyg linen scrim lliain sgrim linen scrims lliain sgrim linen thread edau lin linen threads edau lin linen-fold panel panel lliein-blyg linen-fold panels panel lliein-blyg linens lliain liner leiner liner train trên leiner liner trains trên leiner liners leiner lines lein (for railway, clothes etc) lines llinell (=mark on a surface) lines rhes (=row) lines of communication ffyrdd cyswllt lines of force llinellau grym lines of supply ffyrdd cyflenwi lines per minute llinellau y funud (lpm) linesman llumanwr linesman's flag lluman linesman's flags lluman linesmans llumanwr ling brenhinbysg lingerie lingerie lingeries lingerie lings brenhinbysg linguistic ieithyddol linguistic method dull ieithyddol linguistic methods dull ieithyddol linguistics ieithyddiaeth lining leinin lining tool erfyn llinellu lining tools erfyn llinellu lining wheel olwyn linellu lining wheels olwyn linellu linings leinin link cyswllt (of person or connecting thing) link cysylltu link dolen (=loop or ring of chain) link between voice and character cysylltiad rhwng y llais a'r cymeriad link between voice and characters cysylltiad rhwng y llais a'r cymeriad link button botwm cyswllt link buttons botwm cyswllt link for automatic feed dolen borthiant awtomatig link mechanism mecanwaith dolen link mechanisms mecanwaith dolen link polygon polygon cyswllt link polygons polygon cyswllt link simple skills cysylltu medrau syml link-edit cyswllt-olygu link-editor cyswllt-olygydd link-editors cyswllt-olygydd link-loader cyswllt-lwythydd link-loaders cyswllt-lwythydd linkage cysylltedd linkage editor golygydd cysylltedd linkage editors golygydd cysylltedd linkages cysylltedd linked group grŵp cysylltiedig linked groups grŵp cysylltiedig linked list rhestr gysylltiedig linked lists rhestr gysylltiedig linked sub-routine is-reolwaith cysylltiedig linked sub-routines is-reolwaith cysylltiedig linker cysylltwr linkers cysylltwr links cyswllt (of person or connecting thing) links dolen (=loop or ring of chain) lino leino lino cut torlun leino lino cuts torlun leino lino cutter torrell leino lino cutters torrell leino lino cutting nib nib torri leino lino cutting nibs nib torri leino lino knife cyllell leino lino knifes cyllell leino lino print print leino lino printing printio leino lino prints print leino lino roller rholer leino lino rollers rholer leino lino-block printing printio bloc leino lino-printing ink inc printio leino lino-printing inks inc printio leino linoleum linoliwm linoleums linoliwm linseed oil olew had llin linseed oils olew had llin linson linson linsons linson lintel capan drws lintels capan drws lip gosod ymyl lip gwefus (drill part) lip min (corrie) lip clearance angle ongl cliriad gwefus (drill part) lip clearance angles ongl cliriad gwefus (drill part) lip reading darllen gwefusau lipase lipas lipases lipas lipid lipid lipid molecule moleciwl lipid lipid molecules moleciwl lipid lipids lipid lipogenesis lipogenesis lipoid lipoid lipoids lipoid lipotropy lipotropi lipped edge ymyl osod lipped edges ymyl osod liquefaction hylifiad liquefactions hylifiad liquefiable hylifadwy liquefied hylifedig liquefy hylifo liquid hylif liquid hylifol liquid assets asedau hylifol liquid colour lliw hylifol liquid colourant lliwydd hylif liquid colourants lliwydd hylif liquid colours lliw hylifol liquid core craidd hylifol liquid cores craidd hylifol liquid crystal display arddangosiad grisial hylif (LCD) liquid crystals grisialau hylif liquid detergent glanedydd hylif liquid detergents glanedydd hylif liquid form ffurf hylifol liquid forms ffurf hylifol liquid measure mesur hylif liquid measures mesur hylif liquid medium cyfrwng hylif liquid mediums cyfrwng hylif liquid metal polish llathrydd metel hylifol liquid metal polishs llathrydd metel hylifol liquid soap sebon hylif liquid soaps sebon hylif liquid wax polish llathr cwyr hylif liquid wax polishs llathr cwyr hylif liquidate difodi liquidated damages clause cymal iawndal penodedig liquidated damages clauses cymal iawndal penodedig liquidation difodiant (=annihilation) liquidation methdaliad (=bankruptcy) liquidations difodiant (=annihilation) liquidations methdaliad (=bankruptcy) liquidity hylifedd liquidity preference theory damcaniaeth ffafriaeth hylifedd liquidizer hylifydd liquidizers hylifydd liquids hylif list rhestr list processing prosesu rhestri listen gwrando listen attentively gwrando'n astud listening comprehension gwrando a deall listening test prawf gwrando listening tests prawf gwrando lists rhestr litany litani literacy llythrennedd literal llythrennol literal rule rheol lythrennol literal rules rheol lythrennol literal translation cyfieithiad llythrennol literal translations cyfieithiad llythrennol literary llenyddol literary art celfyddyd lenyddol literary arts celfyddyd lenyddol literate llythrennog literature llenyddiaeth literature survey arolwg llenyddol literatures llenyddiaeth litharge litharg litharges litharg lithium lithiwm (Li) lithiums lithiwm (Li) lithograph lithograff lithographs lithograff lithography lithograffi lithology litholeg lithosere lithoser lithoseres lithoser lithosol lithosol lithosols lithosol lithosphere lithosffer lithospheres lithosffer litigant achwynwr litigants achwynwr litigate ymgyfreithio litigation cyfreitha litigious cyfreithgar litigiousness cyfreithgarwch litmus litmws litre litr litres litr litter gwasarn (=animal bedding) litter torllwyth (of animals) litters gwasarn (=animal bedding) litters torllwyth (of animals) littoral arfordir littoral arfordirol littorals arfordir liturgical litwrgaidd liturgy litwrgi live byw live action ffilmio byw (in film and television) live birth genedigaeth fyw live births genedigaeth fyw live centre canol tro (headstock) live centres canol tro (headstock) live knot cainc fyw live knots cainc fyw live music cerddoriaeth fyw live musics cerddoriaeth fyw live record cofnod byw live records cofnod byw live vaccine brechlyn byw live vaccines brechlyn byw live wire gwifren fyw live wires gwifren fyw liver afu liver fluke clefyd yr euod (disease) liver fluke llyngyren yr afu (organism) liver flukes clefyd yr euod (disease) liver flukes llyngyren yr afu (organism) livers afu liverwort llys yr afu liverworts llys yr afu livery lifrai livery and maintenance lifrai a chynhaliaeth livestock da byw livestock farming ffermio da byw living byw living bywoliaeth living cell cell fyw living cells cell fyw living thing peth byw living things peth byw livings bywoliaeth load llwyth load llwytho load bearing surface arwyneb sy'n dal pwysau load bearing surfaces arwyneb sy'n dal pwysau load current cerrynt llwyth load currents cerrynt llwyth load font llwytho ffont load point pwynt llwyth load points pwynt llwyth load-bearing wall wal cynnal pwysau load-bearing walls wal cynnal pwysau loader llwythwr (program) loaders llwythwr (program) loading bay man llwytho loads llwyth loafing yard lloc cadw loafing yards lloc cadw loam lom loams lom loamy lomog loan benthyca loan benthyciad loans benthyciad lob lob lob lobio lobate bar bar clustennog lobate bars bar clustennog lobby lobi (hall in parliament, a body of lobbyists) lobby lobïo lobby correspondent gohebydd lobi lobby correspondents gohebydd lobi lobbyist lobïwr lobbyists lobïwr lobe llabed lobed llabedog lobes llabed lobule llabeden lobules llabeden local lleol local agreed syllabus maes llafur cytûn lleol local anaesthetic anaesthetig lleol local anaesthetics anaesthetig lleol local area ardal leol local area network rhwydwaith ardal leol (LAN) local area networks rhwydwaith ardal leol (LAN) local areas ardal leol local authority awdurdod lleol local colour lliw lleol local colours lliw lleol local education authority awdurdod addysg lleol local environment amgylchedd lleol local environments amgylchedd lleol local government llywodraeth leol local governments llywodraeth leol local history hanes lleol local management of schools rheolaeth leol ysgolion local relief tirwedd leol local reliefs tirwedd leol local variable newidyn lleol local variables newidyn lleol localization lleoleiddiad (in economics) localizations lleoleiddiad (in economics) localized lleoledig localized activity gweithgaredd lleoledig localized unemployment diweithdra lleol localized unemployments diweithdra lleol locate lleoli locate position lleoli safle locating jig jig lleoli locating jigs jig lleoli locating pin pìn lleoli locating pins pìn lleoli locating plate plât lleoli locating plates plât lleoli location lleoliad location in space safle mewn gwagle location of activities lleoliad gweithgareddau location of features lleoliad nodweddion locational lleoliadol locational analysis dadansoddiad lleoliad locational control rheoli lleoliad locational framework fframwaith lleoliadol locational frameworks fframwaith lleoliadol locational quotient cyniferydd lleoliad locational quotients cyniferydd lleoliad locations lleoliad lock clo (on door etc) lock cloi lock loc (on canal) lock block bloc clo (flush door) lock blocks bloc clo (flush door) lock knit gweuglwm lock nut nyten gloi lock nuts nyten gloi lock out cau allan lock rail rheilen glo lock rails rheilen glo lock stitch pwyth clo lock stitches pwyth clo lock-seat clamp clamp sedd glo lock-seat clamps clamp sedd glo locking device dyfais gloi locking devices dyfais gloi locking plate plât cloi locking plates plât cloi locking stile cledren gloi locking stiles cledren gloi locking washer wasier gloi locking washers wasier gloi locking wedge lletem gloi locking wedges lletem gloi lockjaw genglo lockjaws genglo locks clo (on door etc) locks loc (on canal) lockshield valve falf gloi lockshield valves falf gloi locomotion ymsymudiad locomotions ymsymudiad locomotive locomotif locomotives locomotif locus locws locust locust locusts locust lode gwythïen (mineral) lodes gwythïen (mineral) lodestone tynfaen lodestones tynfaen lodge cyfrinfa lodgement till til glyniad lodgement tills til glyniad lodger lletywr lodgers lletywr lodges cyfrinfa lodging house llety lodging houses llety lodgings llety lodicule lodicwl lodicules lodicwl loft llofft lofted drive dreif uchel lofted drives dreif uchel lofts llofft log boncyff (of wood) log log (=record) log book llyfr log log books llyfr log log jam tagfa goed log jams tagfa goed log phase gwedd log log phases gwedd log log roll troi'n unionsyth log/exponential phase gwedd log/esbonyddol log/exponential phases gwedd log/esbonyddol logarithm logarithm logarithmic logarithmig logarithmic table tabl logarithmig logarithmic tables tabl logarithmig logarithms logarithm logic rhesymeg logic board bwrdd rhesymeg logic boards bwrdd rhesymeg logic circuit cylched resymeg logic circuits cylched resymeg logic design cynllun rhesymeg logic designs cynllun rhesymeg logic diagram diagram rhesymeg logic diagrams diagram rhesymeg logic element elfen resymeg logic elements elfen resymeg logic gate adwy resymeg logic gates adwy resymeg logic system system resymeg logic systems system resymeg logical rhesymegol logical operator gweithredydd rhesymegol logical operators gweithredydd rhesymegol logical record cofnod rhesymegol logical records cofnod rhesymegol logical shift syfliad rhesymegol logical shifts syfliad rhesymegol logical symbol symbol rhesymegol logical symbols symbol rhesymegol logical unit uned resymegol logical units uned resymegol logics rhesymeg logistics logisteg logo logo logogram logogram logograms logogram lone pair pâr unig lone pairs pâr unig lone parent family teulu un rhiant long hir long and short shoulder mortise and tenon joint uniad mortais a thyno ag ysgwydd hir a byr long and short shoulder mortise and tenon joints uniad mortais a thyno ag ysgwydd hir a byr long and short shouldered tenon tyno ysgwydd hir a byr long and short shouldered tenons tyno ysgwydd hir a byr long and short stitch hirbwyth a byrbwyth long auger taradr hir long augers taradr hir long broken line llinell hir doredig long broken lines llinell hir doredig long chain carboxylic acid asid carbocsylig cadwyn hir long chain carboxylic acids asid carbocsylig cadwyn hir long corner cornel bell (in sport) long corners cornel bell (in sport) long distance pellter hir long distances pellter hir long division rhannu hir long grain graen hir long grains graen hir long head stake bonyn pen hir long head stakes bonyn pen hir long high pass pàs hir uchel long hop pelen fer iawn (in cricket) long hops pelen fer iawn (in cricket) long innings batiad hir long jump naid hir long jumper neidiwr hir long jumpers neidiwr hir long jumps naid hir long leaf dalen hir long leafs dalen hir long leg coeswr pell long legs coeswr pell long low pass pàs hir isel long metre mesur hir long metres mesur hir long multiplication lluosi hir long nose pliers gefelen drwyn hir long off pellwr agored long offs pellwr agored long on pellwr coes long ons pellwr coes long parliament senedd faith long parliaments senedd faith long pitch nail hoelen bitsh hir long pitch nails hoelen bitsh hir long profile hydbroffil (of a river) long profiles hydbroffil (of a river) long range forces grymoedd amrediad pell long range plane awyren taith hir long range planes awyren taith hir long round nose pliers gefelen drwyn crwn hir long section hyd-doriad (of a river) long sections hyd-doriad (of a river) long ship llong hir long ships llong hir long sight golwg hir long sights golwg hir long snipe nose pliers gefelen drwyn crwn main hir long stay bed gwely arhosiad hir long stay beds gwely arhosiad hir long step cam hir long steps cam hir long waisted hirwasg long wall talcen hir (of building) long walls talcen hir (of building) long-arm stapler styffylwr hir long-arm staplers styffylwr hir long-armed cross stitch pwyth croes hirfraich long-armed cross stitches pwyth croes hirfraich long-chain cadwyn-hir long-life lamp lamp hir oes long-life lamps lamp hir oes long-ray rheidden-hir long-tailed skua sgiwen lostfain long-tailed skuas sgiwen lostfain long-term tymor hir long-term effects of abuse effeithiau tymor hir camdriniaeth long-term liabilities rhwymedigaethau tymor hir long-term study astudiaeth dymor hir long-term training ymarfer tymor hir long-term trainings ymarfer tymor hir longbow bwa hir longbows bwa hir longevity hirhoedledd longitude hydred longitude and latitude hydred a lledred longitudes hydred longitudinal hydredol longitudinal distance pellter hydredol longitudinal distances pellter hydredol longitudinal feed porthiant hydredol longitudinal feeds porthiant hydredol longitudinal movement symudiad hydredol longitudinal movements symudiad hydredol longitudinal muscle cyhyryn hydredol longitudinal muscles cyhyryn hydredol longitudinal profile proffil hydredol longitudinal profiles proffil hydredol longitudinal section toriad hydredol longitudinal sections toriad hydredol longitudinal vibration dirgryniad hydredol longitudinal vibrations dirgryniad hydredol longitudinal wave ton hydredol longitudinal waves ton hydredol longshore current cerrynt y glannau longshore currents cerrynt y glannau longshore drift drifft y glannau longshore drifts drifft y glannau longways for as many as will ar hyd i bawb a fynno longways set set ar hyd longways sets set ar hyd look edrych look and say method dull edrych a dweud look and say methods dull edrych a dweud look-at ar-edrych look-at table tabl ar-edrych look-at tables tabl ar-edrych look-up am-edrych look-up table tabl am-edrych look-up tables tabl am-edrych loom gwŷdd loom darning creithio gwŷdd looms gwŷdd loop dolen loop and tie dolen a chwlwm loop of Henle ascending limb aelod esgynnol dolen Henle loop of Henle descending limb aelod disgynnol dolen Henle loop stop dolen atal loop stops dolen atal looped cotton cotwm dolennog looped cottons cotwm dolennog looped fabric ffabrig dolennog looped fabrics ffabrig dolennog looped stitch pwyth dolen looped stitches pwyth dolen looped weave gwehyddiad dolennog looped weaves gwehyddiad dolennog loops dolen loose llac loose cover gorchudd rhydd loose covers gorchudd rhydd loose dye llifyn llac loose dyes llifyn llac loose feather tafod rhydd loose feathers tafod rhydd loose fit ffit lac loose fits ffit lac loose head pen rhydd loose heads pen rhydd loose joint uniad llac loose joints uniad llac loose knitting gwau llac loose maul sgarmes rydd loose mauls sgarmes rydd loose rivet rhybed llac loose riveting rhybedu llac loose rivets rhybed llac loose scrum sgrym rydd loose scrums sgrym rydd loose tongue tafod rhydd loose tongue joint uniad tafod rhydd loose tongue joints uniad tafod rhydd loose tongues tafod rhydd loose-leaf book llyfr dalennau rhydd loose-leaf books llyfr dalennau rhydd loosen rhyddhau looseness llacrwydd loosing gollwng (the bow) lop tocio lop-eared clustlipa lopolith lopolith lopoliths lopolith lopsided cam lord arglwydd lord of the manor arglwydd y faenor lords arglwydd lordship arglwyddiaeth lordships arglwyddiaeth lose colour bwrw lliw (enamelling colour) lose colour colli lliw (in general) lose control of the ball colli rheolaeth ar y bêl lose possession of the ball colli meddiant o'r bêl loss colled lost ball pêl goll lost balls pêl goll lost village pentref diflan lost villages pentref diflan lost-wax process proses cwyr coll lot and scot lot a scot lotion trwyth lotions trwyth loud cryf (of sound) loud sound sain gref loud sounds sain gref loudness cryfder (of sound) loudspeaker uchelseinydd loudspeakers uchelseinydd lough loch loughs loch lounge lolfa lounges lolfa louvre lwfer louvre window ffenestr louvre louvre windows ffenestr louvre louvres lwfer love dim sgôr (tennis score) love all dim dim (tennis score) love feast cariadwledd (=Christian feast) love feasts cariadwledd (=Christian feast) love game gêm i ddim low isel low angle ongl isel low angles ongl isel low ball pêl isel low balls pêl isel low carbon carbon isel low carbons carbon isel low cost labour llafur rhad low cost labours llafur rhad low dive deifio'n isel low foaming detergent glanedydd prindrochion low foaming detergents glanedydd prindrochion low frequency amledd isel (of oscillations) low key isgywair (in old Welsh music) low latitude lledred isel low latitudes lledred isel low level lefel isel low levels lefel isel low limit terfan isel low limits terfan isel low line llinell isel low lines llinell isel low net rhwyd isel low nets rhwyd isel low population density dwysedd poblogaeth isel low power drawing lluniad chwyddhad isel low power drawings lluniad chwyddhad isel low pressure gwasgedd isel low pressures gwasgedd isel low register nodau isel low relief cerfwedd isel low reliefs cerfwedd isel low resolution cydraniad isel low resolutions cydraniad isel low self-esteem hunan-barch isel low self-esteems hunan-barch isel low spin troelliad paredig low spins troelliad paredig low step cam isel low steps cam isel low voltage foltedd isel low voltages foltedd isel low water distyll low water mark marc distyll low water marks marc distyll low waters distyll low-angle plane plaen ongl-isel low-angle planes plaen ongl-isel low-level language iaith lefel isel low-level languages iaith lefel isel low-lying plain gwastadedd isel low-lying plains gwastadedd isel low-order is-werth low-order position safle is-werth low-order positions safle is-werth low-pass pas-isel low-pass filter hidlen pasio seiniau isel low-pass filters hidlen pasio seiniau isel lower gostwng lower attaining pupil disgybl is ei gyrhaeddiad lower attaining pupils disgybl is ei gyrhaeddiad lower bound arffin isaf lower bounds arffin isaf lower case letter llythyren fach lower case letters llythyren fach lower class dosbarth isaf lower ground islawr lower grounds islawr lower jaw gên isaf lower jaws gên isaf lower mordent isfordent lower mordents isfordent lower order haen isaf (in geology) lower orders haen isaf (in geology) lower register isgwmpasran lower registers isgwmpasran lower school ysgol isaf lower schools ysgol isaf lower the body gostwng y corff lower tier rhes isaf lower tiers rhes isaf lowest common multiple lluosrif cyffredin lleiaf lowest common multiples lluosrif cyffredin lleiaf lowest order gradd isaf lowest orders gradd isaf lowest terms ffurf symlaf lowland iseldir lowlands iseldir loxodrome locsodrom (=rhumb line) loxodromes locsodrom (=rhumb line) loyal teyrngar loyalist teyrngarwr loyalists teyrngarwr loyalty teyrngarwch loyalty card cerdyn ffyddlondeb loyalty cards cerdyn ffyddlondeb lozenge graver crafell losin lozenge gravers crafell losin lubricant iraid lubricants iraid lubricate iro lubricating nipples niplau iro lubricating point pwynt iro lubricating points pwynt iro lubrication iriad lubrications iriad lucerne maglys lucernes maglys lucid eglur ludo liwdo lug clust lukewarm claear lukewarm water dŵr claear lukewarm waters dŵr claear lullaby hwiangerdd lumbar meingefnol lumbar puncture tynnu hylif madruddyn y cefn lumbar region adran y meingefn lumbar regions adran y meingefn lumbar vertebra fertebra meingefnol lumbar vertebras fertebra meingefnol lumber coed lumbering coetmona lumberjack coetmon lumberjacks coetmon lumen lwmen lumens lwmen luminescence ymoleuedd luminescences ymoleuedd luminosity goleuedd luminous goleuol luminous intensity arddwysedd goleuol lump lwmp lump sum lwmp-swm lump sums lwmp-swm lumps lwmp lumpsucker pysgodyn clytsiwr lumpsuckers pysgodyn clytsiwr lunar day diwrnod lleuad lunar eclipse diffyg ar y lleuad lunar eclipses diffyg ar y lleuad lunar month mis lleuad lunar months mis lleuad lunatic gwallgofddyn lunatic fringe ymylwyr gwallgof lunatics gwallgofddyn lunch cinio canol dydd lunch interval amser cinio lunch intervals amser cinio lunches cinio canol dydd lune lŵn lunes lŵn lung ysgyfant lung capacity cynhwysedd yr ysgyfaint lung deflation dadchwythiant yr ysgyfaint lung deflations dadchwythiant yr ysgyfaint lung fish pysgodyn ysgyfeiniog lung fishs pysgodyn ysgyfeiniog lung volume cyfaint ysgyfaint lung volumes cyfaint ysgyfaint lunge rhagwth lunge forward rhagwth ymlaen lunge forwards rhagwth ymlaen lunge in low line rhagwth ar linell isel lunge outward rhagwth allan lunge outwards rhagwth allan lunge sideways rhagwth ochr lunges rhagwth lungs ysgyfant lunula lwnwla lunulas lwnwla lustre gloywedd lustre pottery crochenwaith gloywedd lustres gloywedd lustrous gloyw (finish) lustrous material defnydd gloyw lustrous materials defnydd gloyw lute liwt luteal cells celloedd lwteal luteinizing hormone hormon lwteineiddio luteinizing hormones hormon lwteineiddio lutenist liwtydd lutenists liwtydd lutes liwt lutetium lwtetiwm (Lu) lutetiums lwtetiwm (Lu) luting liwtio lux lwcs luxurious moethus luxury moeth luxury goods nwyddau moeth lychgate porth mynwent lychgates porth mynwent lying down gorweddol lying press gwasg osod lyme grass clymwellt lymph lymff lymph gland chwarren lymff lymph glands chwarren lymff lymph node nod lymff lymph nodes nod lymff lymph vessel pibell lymff lymph vessels pibell lymff lymphatic lymffatig lymphatic gland chwarren lymffatig lymphatic glands chwarren lymffatig lymphatic system system lymffatig lymphatic systems system lymffatig lymphocyte lymffocyt lymphocytes lymffocyt lymphs lymff lynchet glaslain lynchets glaslain lynx lyncs lynxes lyncs lyre lyra lyres lyra lyric drama drama delynegol lyric dramas drama delynegol lyric opera opera delynegol lyric operas opera delynegol lyric tenor tenor ysgafn lyric tenors tenor ysgafn lysergic acid diethylamide LSD deuethylamid asid lysergig lysine lysin lysines lysin lysis lysis lysogeny lysogenedd lysosome lysosom lysosomes lysosom lysozyme lysosym lysozymes lysosym lytic lytig macaroni cheese caws macaroni macaroni cheeses caws macaroni mace byrllysg macerate briwio maces byrllysg machine peiriannu machine peiriant machine architecture saernïaeth peiriant machine architectures saernïaeth peiriant machine attachments atodion peiriant machine code cod peiriant machine code language iaith cod peiriant machine code languages iaith cod peiriant machine codes cod peiriant machine cycle cylchred peiriant machine cycles cylchred peiriant machine darn craith peiriant machine darn patch clwt craith peiriant machine darn patches clwt craith peiriant machine darns craith peiriant machine embroidery brodwaith peiriant machine fell seam sêm ffel ddwbl machine fell seams sêm ffel ddwbl machine gather crychdynnu â pheiriant machine gun gwn peiriant machine guns gwn peiriant machine heads ebillres machine independent annibynnol ar y peiriant machine language iaith peiriant machine languages iaith peiriant machine made buttonhole twll botwm peiriant machine made buttonholes twll botwm peiriant machine needle nodwydd peiriant machine needles nodwydd peiriant machine operating system system weithredu peiriant (MOS) machine operating systems system weithredu peiriant (MOS) machine operator gweithiwr peiriannau machine operators gweithiwr peiriannau machine screw sgriw beiriant machine screws sgriw beiriant machine shop gweithdy peiriannau machine shops gweithdy peiriannau machine tools offer peiriannau machine vice feis peiriant machine vices feis peiriant machine washable golchadwy â pheiriant machine word gair peiriant machine words gair peiriant machined component cydran wedi'i pheiriannu machined components cydran wedi'i pheiriannu machinery peirianwaith machines peiriant machining allowance lwfans peiriannu machining allowances lwfans peiriannu mackerel sky traeth awyr macramé macramé macramé twine cortyn macramé macramé twines cortyn macramé macramés macramé macro macro macro factor macro ffactor macro factors macro ffactor macro nutrient macrofaethyn macro nutrients macrofaethyn macro programming rhaglennu macro macro-climate macrohinsawdd macro-climates macrohinsawdd macroassembler macrogydosodydd macroassemblers macrogydosodydd macrocosm macrocosm macrocosms macrocosm macroeconomic macro economaidd macroeconomic issue mater macroeconomaidd macroeconomic issues mater macroeconomaidd macroeconomic objective amcan macroeconomaidd macroeconomic objectives amcan macroeconomaidd macroeconomic policy polisi macroeconomaidd macroeconomic theory theori facroeconomaidd macrophage macroffag macrophages macroffag macula macwla maculas macwla made environment amgylchedd gwneud made environments amgylchedd gwneud made form ffurf wneud made forms ffurf wneud madrigal madrigal madrigals madrigal magazine cylchgrawn magazine cover clawr cylchgrawn magazine covers clawr cylchgrawn magazine rack rhesel gylchgronau magazine racks rhesel gylchgronau magazines cylchgrawn magenta magenta magentas magenta maggot cynrhonyn maggots cynrhonyn magic hud magic chain stitch pwyth cadwyn hud magic chain stitches pwyth cadwyn hud magician dewin magicians dewin magics hud magistracy ynadaeth magistrate ynad magistrates ynad magistrates court llys ynadon magistrates courts llys ynadon magma magma magmas magma magmatic magmatig magnesian magnesaidd magnesium magnesiwm (Mg) magnesium bicarbonate magnesiwm deucarbonad magnesium bicarbonates magnesiwm deucarbonad magnesium carbonate magnesiwm carbonad magnesium carbonates magnesiwm carbonad magnesiums magnesiwm (Mg) magnet magnet magnetic magnetig magnetic bearing cyfeiriant magnetig magnetic bearings cyfeiriant magnetig magnetic board bwrdd magnetig magnetic boards bwrdd magnetig magnetic bubble memory cof bwrlwm magnetig magnetic card cerdyn magnetig magnetic cards cerdyn magnetig magnetic catch clicied fagnetig magnetic catches clicied fagnetig magnetic core store storfa craidd magnetig magnetic core stores storfa craidd magnetig magnetic disk disg magnetig magnetic disks disg magnetig magnetic field maes magnetig magnetic field line llinell faes magnetig magnetic field lines llinell faes magnetig magnetic fields maes magnetig magnetic flux fflwcs magnetig magnetic flux density dwysedd fflwcs magnetig magnetic fluxes fflwcs magnetig magnetic ink character recognition adnabod nodau inc magnetig (MICR) magnetic medium cyfrwng magnetig magnetic mediums cyfrwng magnetig magnetic moment moment magnetig magnetic moments moment magnetig magnetic north gogledd magnetig magnetic norths gogledd magnetig magnetic pole pôl magnetig magnetic poles pôl magnetig magnetic stirrer tröydd magnetig magnetic stirrers tröydd magnetig magnetic tape tâp magnetig magnetic tapes tâp magnetig magnetism magnetedd (of property) magnetism magneteg (study of) magnetisms magnetedd (of property) magnetisms magneteg (study of) magnetization magneteiddiad magnetizations magneteiddiad magnetize magneteiddio magneto magneto magnetometer magnetomedr magnetometers magnetomedr magnetron magnetron magnetrons magnetron magnets magnet magnification chwyddhad magnifications chwyddhad magnifier chwyddhadur magnifiers chwyddhadur magnify chwyddo magnifying glass chwyddwydr magnitude maint magnitude and direction maint a chyfeiriad magnitude of linear motion maint mudiant llinol magnitudes maint magyar sleeve llawes magyar magyar sleeves llawes magyar mahlstick ffon peintiwr mahlsticks ffon peintiwr mahogany mahogani maiden name enw cyn priodi maiden names enw cyn priodi maiden over pelawd ddi-sgôr maiden overs pelawd ddi-sgôr mail post mail boat llong bost mail boats llong bost mail order archeb drwy'r post mail order archebu drwy'r post mail orders archeb drwy'r post mail-order archebion post mail-shot post-dafliad mail-shots post-dafliad mailcoach coets y post mailcoaches coets y post mails post main axis prif echelin main colour prif liw main colours prif liw main competitor prif gystadleuydd main competitors prif gystadleuydd main criterion prif faen prawf main criterions prif faen prawf main dimensions prif ddimensiynau main entrance porth (of church) main entrances porth (of church) main frame prif gyfrifiadur main frames prif gyfrifiadur main mast prif hwylbren main masts prif hwylbren main memory prif gof main menu prif ddewislen main menus prif ddewislen main pipe prif bibell main pipes prif bibell main rafter prif geibr main rafters prif geibr main religion prif grefydd main religions prif grefydd main screen prif sgrin main screens prif sgrin main sequence stars sêr prif ddilyniant main spindle prif werthyd (lathe part) main spindles prif werthyd (lathe part) main store prif storfa main stores prif storfa main stream prif ffrwd main streams prif ffrwd main subject prif destun main subjects prif destun main trend prif duedd main trends prif duedd mainland tir mawr mainlands tir mawr mains prif gyflenwad mainsail hwyl fawr mainsails hwyl fawr mainsheet prif raff mainsheets prif raff mainstream film ffilm brif ffrwd mainstream films ffilm brif ffrwd mainstreaming prif ffrydio maintain a part cynnal rhan maintain possession cadw meddiant maintain possession of the ball cadw meddiant o'r bêl maintained school ysgol a gynhelir maintained schools ysgol a gynhelir maintainer cynheiliad maintainers cynheiliad maintenance cynnal a chadw (of buildings etc) maintenance cost cost cynnal maintenance costs cost cynnal maintenance documentation dogfennaeth cynnal maintenance documentations dogfennaeth cynnal maintenance grant grant cynnal (for students) maintenance grants grant cynnal (for students) maintenance of growth cynnal twf maintenance operation gweithrediad cynnal maintenance operations gweithrediad cynnal maize India corn maize oil olew corn maize oils olew corn maizes India corn majestic mawreddog majesty mawrhydi majolica majolica (enamelled pottery) majolicas majolica (enamelled pottery) major mwyaf major uwch-gapten major aftershock prif ôl-gryniad major aftershocks prif ôl-gryniad major and minor games prif a mân chwaraeon major axis echelin hwyaf major chord cord mwyaf major chords cord mwyaf major common chord cord cyffredin mwyaf major common chords cord cyffredin mwyaf major diameter diamedr mwyaf major diameters diamedr mwyaf major health problem problem iechyd o bwys major health problems problem iechyd o bwys major incident digwyddiad mawr major incidents digwyddiad mawr major interval cyfwng mwyaf major intervals cyfwng mwyaf major key cywair mwyaf major life change newid pwysig i fywyd major life changes newid pwysig i fywyd major order prif urdd major orders prif urdd major scale graddfa fwyaf major scales graddfa fwyaf major-general uwch-frigadydd major-generals uwch-frigadydd majority mwyafrif majors uwch-gapten majuscule llythrennau bras make gwneud make a bridge gwneud pont make a circle gwneud cylch make a dance creu dawns make a decision penderfynu make a sketch-map llunio llinfap make fast clymwch make judgement barnu make observations cynnig arsylwadau make patterns gwneud patrymau make the transition croesi'r bont (linguistically) make up dyfeisio (=devise) make up paratoi (a solution) make up to the mark llenwi hyd at y graddnod make-believe dychymyg make-believe ffug make-believe smalio make-believes dychymyg make-up colur (cosmetics) make-up coluro (cosmetics) make-up box blwch coluro make-up boxes blwch coluro make-ups colur (cosmetics) mako shark morgi trwynfain mako sharks morgi trwynfain maladjusted child plentyn heb ymaddasu maladjusted childs plentyn heb ymaddasu maladjustment diffyg ymaddasiad maladjustments diffyg ymaddasiad maladministration camweinyddu malaria malaria malarial swamps gwernydd malaria malarias malaria male gwryw male gwrywol male gamete gamet gwryw male gametes gamet gwryw male reproductive cell cell atgenhedlol wrywol male reproductive cells cell atgenhedlol wrywol male voice choir côr meibion male voice choirs côr meibion maleness gwrywedd males gwryw malformation camffurfiad malformations camffurfiad malfunction camweithio malfunction diffyg malfunctions diffyg malic acid asid malig malic acids asid malig malicious damage difrod maleisus malicious damages difrod maleisus malignant malaen malleability hydrinedd malleable hydrin malleable cast iron haearn bwrw hydrin malleable cast irons haearn bwrw hydrin malleable iron dur canol (ferrous metal) malleable iron haearn hydrin malleable irons dur canol (ferrous metal) malleable irons haearn hydrin malleable nail hoelen hydrin malleable nails hoelen hydrin mallee malî mallees malî mallet gordd mallets gordd malleus morthwyl y glust malnutrition diffyg maeth malnutritions diffyg maeth malonic acid asid malonig malonic acids asid malonig malt brag brag malt brags brag malt bread bara brag malt breads bara brag maltose maltos maltoses maltos mamillated bronennog mammal mamolyn mammalian mamolaidd mammalian skeleton sgerbwd mamolaidd mammalian skeletons sgerbwd mamolaidd mammals mamolyn mammary bronnol mammary gland chwarren laeth mammary glands chwarren laeth mammatocumulus brongwmwl mammoth mamoth mammoths mamoth man to man defence amddiffyn dyn am ddyn man-at-arms milwr arfog man-day dydd gweithiwr man-machine interface rhyngwyneb peiriant-dyn man-machine interfaces rhyngwyneb peiriant-dyn man-made fibre ffibr gwneud man-made fibres ffibr gwneud man-made materials defnyddiau gwneud man-made object gwrthrych gwneud man-made objects gwrthrych gwneud man-of-war llong arfog man-of-wars llong arfog manage rheoli manage and control rheoli a chadw trefn manage environments rheoli amgylcheddau manage expenditure rheoli gwariant manageable hylaw managed exchange rate cyfradd cyfnewid reoledig managed exchange rates cyfradd cyfnewid reoledig management rheolaeth (act of) management rheolwyr (=managers) management information gwybodaeth rheoli management informations gwybodaeth rheoli managements rheolaeth (act of) manager rheolwr manageress rheolwraig managerial rheolaethol managerial post swydd reoli managerial posts swydd reoli managerial skills sgiliau rheoli managerial studies astudiaethau rheoli managers rheolwr managing director rheolwr-gyfarwyddwr managing directors rheolwr-gyfarwyddwr managing unwanted behaviour rheoli ymddygiad digroeso manciple swyddog cyflenwi manciples swyddog cyflenwi mandarin collar coler mandarin mandarin collars coler mandarin mandarin ink inc mandarin mandarin inks inc mandarin mandate mandad mandated mandedig mandated territory tiriogaeth fandadol mandates mandad mandatory gorfodol mandatory exception eithriad gorfodol mandatory exceptions eithriad gorfodol mandatory grant grant gorfodol mandatory grants grant gorfodol mandatory unit uned orfodol mandatory units uned orfodol mandible mandibl mandibles mandibl mandibular arch bwa'r mandibl mandibular arches bwa'r mandibl mandolin mandolin mandolins mandolin mandorla mandorla mandorlas mandorla mandrel mandrel (lathe part) mandrels mandrel (lathe part) manganese manganîs (Mn) manganeses manganîs (Mn) mangle mangl mangle manglo mangles mangl mango mango mangrove swamp gwern fangrof mangrove swamps gwern fangrof manhole twll archwilio manholes twll archwilio manhood suffrage pleidlais gwŷr manhood suffrages pleidlais gwŷr mania mania manias mania manic manig manic depression iselder manig manic depressions iselder manig manifest amlygu manifest destiny arfaeth amlwg manifesto maniffesto manifold maniffold manifolds maniffold manikin manicin manikins manicin manilla manila manilla paper papur manila manilla papers papur manila manillas manila manipulate llawdrin (with hands) manipulate trin (data etc) manipulation llawdriniaeth manipulations llawdriniaeth manipulative play chwarae trin â’r dwylo manipulative skill sgìl llawdriniol manipulative skills sgìl llawdriniol manna manna mannas manna mannerism darddulliaeth (in art) mannerisms darddulliaeth (in art) mannerist darddullaidd mannerist darddullwr mannerist style arddull darddullaidd mannerist styles arddull darddullaidd mannerists darddullwr manoeuvres ymarferion manometer manomedr manometers manomedr manor maenor manorial system trefn faenorol manorial systems trefn faenorol manors maenor manpower adnoddau llafur (of resources) manpower gweithlu (=labour force) manpower planning cynllunio nifer y gweithlu manpowers gweithlu (=labour force) mansard roof to mansard mansard roofs to mansard mansion plas mansion house plasty mansion houses plasty mansions plas mantel shelf silff fantell mantel shelfs silff fantell mantelpiece silff ben tân mantelpieces silff ben tân mantissa mantisa mantissas mantisa mantle mantell mantle mantellu mantle cavity ceudod mantell mantle rock creicaen mantle rocks creicaen mantles mantell mantra mantra mantras mantra manual llawlyfr (book) manual seinglawr (on instrument) manual sphygmomanometer teclyn mesur pwysau gwaed llaw manual sphygmomanometers teclyn mesur pwysau gwaed llaw manual worker gweithiwr llaw manual workers gweithiwr llaw manuals llawlyfr (book) manuals seinglawr (on instrument) manufacture cynhyrchu manufactured apparatus offer parod manufactured board pren cyfansawdd manufactured boards pren cyfansawdd manufactured cloth defnydd gwneud manufactured cloths defnydd gwneud manufactured goods gweithgynhyrchion manufacturer gwneuthurwr manufacturers gwneuthurwr manufacturing industry diwydiant gweithgynhyrchu manumission rhyddhau manumissions rhyddhau manure tail manure teilo manures tail manuscript llawysgrif manuscript ink inc llawysgrif manuscript inks inc llawysgrif manuscript lettering llythrennu llawysgrif manuscript music book llyfr erwydd manuscript music books llyfr erwydd manuscript paper papur erwydd (for music) manuscript papers papur erwydd (for music) manuscript sheet taflen erwydd (for music) manuscript sheets taflen erwydd (for music) manuscripts llawysgrif many-many correspondence cyfatebiaeth llawer-i-lawer many-many correspondences cyfatebiaeth llawer-i-lawer many-one correspondence cyfatebiaeth llawer-i-un many-one correspondences cyfatebiaeth llawer-i-un many-to-many llawer-i-lawer many-valued lluoswerth map map map mapio map analysis dadansoddiad map map reference cyfeirnod map map references cyfeirnod map map sheet dalen fap map sheets dalen fap mapping pen pen mapio mapping pens pen mapio maquette maquette maquettes maquette marathon marathon marathons marathon marauder ysbeiliwr marauders ysbeiliwr marble marblen marble marmor marble chips sglodion marmor marbles marblen marbles marmor marbling marmori marbling colour lliw marmori marbling colours lliw marmori marbling comb crib farmori marbling combs crib farmori marbling effects effeithiau marmori marbling technique techneg marmori marbling techniques techneg marmori marbling trough cafn marmori marbling troughs cafn marmori march goror (=border) march gorymdaith (=procession) march gorymdeithio (=walk in procession) march ymdaith (=journey) march ymdeithgan (music) march ymdeithio (=journey) marcher Lords Arglwyddi'r Mers marcher customs arferion y Mers marches goror (=border) marches gorymdaith (=procession) marches ymdaith (=journey) marches ymdeithgan (music) marching camp gwersyll dros dro marching camps gwersyll dros dro margarine margarin margarines margarin margin maint (of profit) margin ymyl (of page) margin guide canllaw ymyl margin guides canllaw ymyl margin of error lled y gwall margin release datglöwr margin releases datglöwr margin setting gosodiad ymyl margin settings gosodiad ymyl margin stop stop ymyl margin stops stop ymyl marginal ymylol marginal cost cost ymylol marginal costing costio ymylol marginal costs cost ymylol marginal distribution function ffwythiant dosraniad ymylol marginal distribution functions ffwythiant dosraniad ymylol marginal efficiency of capital effeithlonrwydd ymylol cyfalaf marginal land tir ymylol marginal lands tir ymylol marginal product cynnyrch ymylol marginal products cynnyrch ymylol marginal propensity to consume tuedd ymylol i dreulio marginal propensity to import tuedd ymylol i fewnforio marginal propensity to save tuedd ymylol i gynilo marginal rate of tax cyfradd ymylol treth marginal revenue refeniw ymylol marginal revenue product cynnyrch refeniw ymylol marginal revenue products cynnyrch refeniw ymylol marginal revenues refeniw ymylol marginal utility budd ymylol marginalize ymyleiddio margins maint (of profit) margins ymyl (of page) marina marina marinas marina marine morol marine môr-filwr marine grade plywood pren haenog gradd morol marine grade plywoods pren haenog gradd morol marine painting môr-baentiad (of picture) marine painting môr-beintio (of process or art) marine paintings môr-baentiad (of picture) marine varnish farnais morol marine varnishs farnais morol marines môr-filwr marionette pyped marionettes pyped marital priodasol maritime arforol (=coastal) maritime morwrol (=seafaring) maritime law cyfraith forwrol maritime laws cyfraith forwrol mark marc (numerical or alphabetical award) mark marcio mark nod (trace or symbol) mark of expression marc mynegiant mark out marcio mark scheme cynllun marcio mark schemes cynllun marcio mark sensing synhwyro marc mark sheet taflen farciau mark sheets taflen farciau mark the opponent marcio'r gwrthwynebwr mark weighting pwysiad marciau mark weightings pwysiad marciau marked price pris dangosol marked prices pris dangosol marker marciwr markers marciwr market marchnad market marchnata market analysis dadansoddiad o'r farchnad market characteristic nodwedd farchnad market characteristics nodwedd farchnad market conditions cyflwr y farchnad market demand curve cromlin galw marchnad market demand curves cromlin galw marchnad market economy economi marchnad market failure methiant y farchnad market failures methiant y farchnad market force grym y farchnad market forces grym y farchnad market garden gardd fasnachol market gardening garddio masnachol market gardens gardd fasnachol market place marchnad market places marchnad market pull tyniad y farchnad market pulls tyniad y farchnad market research ymchwil marchnata market research strategy strategaeth ymchwil farchnata market researches ymchwil marchnata market segment segment o’r farchnad market segmentation segmentiad y farchnad market segmentations segmentiad y farchnad market segments segment o’r farchnad market square sgwâr marchnad market squares sgwâr marchnad market town tref farchnad market towns tref farchnad market value gwerth y farchnad market values gwerth y farchnad marketable gwerthadwy marketable wealth cyfoeth gwerthadwy marketable wealths cyfoeth gwerthadwy marketing communications cyfathrebu marchnata marketing department adran farchnata marketing departments adran farchnata marketing manager rheolwr marchnata marketing managers rheolwr marchnata marketing mix cymysgedd marchnata marketing mixes cymysgedd marchnata marketing plan cynllun marchnata marketing plans cynllun marchnata marketing research ymchwil i farchnata marketing research agency asiantaeth ymchwil marchnata marketing researches ymchwil i farchnata marketing strategy strategaeth farchnata markets marchnad marking gauge medrydd marcio marking gauges medrydd marcio marking knife cyllell farcio marking knifes cyllell farcio marking medium cyfrwng marcio marking mediums cyfrwng marcio marking out fluid llifydd marcio marking out fluids llifydd marcio marking table bwrdd marcio marking tables bwrdd marcio marks marc (numerical or alphabetical award) marks nod (trace or symbol) marl marl marl marlio marls marl marly marlog marouflage marouflage marouflages marouflage marquetry argaenwaith marquis ardalydd marram grass moresg marriage priodas marriage by proxy priodas ddirprwyol marriage portion gwaddol priodferch marriage portions gwaddol priodferch marriage settlement cytundeb priodas marriage settlements cytundeb priodas marriages priodas marrow mêr marrows mêr marsh fritillary brith y gors marsh or salting mignen neu halwyndir marsh orchid tegeirian rhuddgoch marsh orchids tegeirian rhuddgoch marshal marsial marshalling yard iard drefnu marshalling yards iard drefnu marshals marsial mart marchnad martensite martensit martensites martensit martial law cyfraith rhyfel martial laws cyfraith rhyfel marts marchnad martyr merthyr martyr merthyru martyrdom merthyrdod martyrdoms merthyrdod martyrology merthyroleg martyrs merthyr mashlum amyd mashlums amyd mask cuddio (=hide) mask masgio (with masking tape) mask mwgwd maskable interrupt ymyriad cuddiadwy maskable interrupts ymyriad cuddiadwy masked sprite ciplun cuddiedig masked sprites ciplun cuddiedig masking tape tâp masgio masking tapes tâp masgio masks mwgwd mason saer maen masonry bit ebill maen masonry bits ebill maen masonry drill dril gwaith maen masonry drills dril gwaith maen masonry nail hoelen gwaith maen masonry nails hoelen gwaith maen masons saer maen masque masque masques masque mass màs (of matter) mass offeren mass defect diffyg màs mass defects diffyg màs mass flow màs-lifiad mass flows màs-lifiad mass for the dead offeren i'r meirw mass media cyfryngau torfol mass movement màs-symudiad (in physics) mass movement symudiad torfol (of people) mass movements màs-symudiad (in physics) mass movements symudiad torfol (of people) mass number rhif màs mass numbers rhif màs mass of solid màs y solid mass priest periglor mass priests periglor mass produce masgynhyrchu mass produced goods nwyddau masgynnyrch mass production masgynhyrchu mass spectrograph sbectrograff màs mass spectrographs sbectrograff màs mass spectrometer sbectromedr màs mass spectrometers sbectromedr màs mass spectrum sbectrwm màs mass spectrums sbectrwm màs mass storage storfa fàs mass storages storfa fàs mass-wasting masddarfodiant mass-wastings masddarfodiant massacre cyflafan (of specific historical instances) massacre lladdfa (in general especially in plural) massacres cyflafan (of specific historical instances) massacres lladdfa (in general especially in plural) massage tylino'r corff masseter muscle cyhyryn maseter masseter muscles cyhyryn maseter massif masiff massifs masiff massive enfawr (=enormous) massive masfawr (in physics) mast hwylbren mast cell mastgell mast cells mastgell master meistr master meistroli master prif (=main) master / slave system system meistr / gwas master / slave systems system meistr / gwas master cast cast gwreiddiol master casts cast gwreiddiol master copy copi gwreiddiol master of the rolls meistr y roliau master page prif dudalen master pages prif dudalen master's degree gradd meistr master's degrees gradd meistr masters meistr mastery meistrolaeth mastery learning dysgu meistrolaeth mastery test prawf meistrolaeth mastery tests prawf meistrolaeth masthead teitl mastheads teitl mastic mastig masticate cnoi mastics mastig mastoid process cnepyn mastoid masts hwylbren masturbate mastyrbio masturbation mastyrbiad masturbations mastyrbiad mat mat match cydweddu match gêm (=game) match boards byrddau cydwedd match play chwarae gornest match point pwynt gornest match points pwynt gornest matchboarding estyll cydwedd matchboarding panel panel estyll cydwedd matchboarding panels panel estyll cydwedd matches gêm (=game) matching accessories cyfwisgoedd cydwedd matching plane plaen cydweddu matching planes plaen cydweddu matching sides ochrau cyfatebol matchstick coes matsen matchsticks coes matsen mate cyplu material defnydd (=fabric, objects with physical presence) material deunydd (=information and other abstractions) material materol material characteristics nodweddion defnyddiau material object gwrthrych materol material objects gwrthrych materol material weave gwehyddiad defnydd material weaves gwehyddiad defnydd materialism materoliaeth materialisms materoliaeth materials defnydd (=fabric, objects with physical presence) materials deunydd (=information and other abstractions) materials and components defnyddiau a chydrannau materials list rhestr ddefnyddiau materials lists rhestr ddefnyddiau maternal mamol maternal chromosome cromosom o du'r fam maternal chromosomes cromosom o du'r fam maternal deprivation theory damcaniaeth amddifadaeth mam maternity mamolaeth maternity allowance lwfans mamolaeth maternity allowances lwfans mamolaeth maternity grant grant mamolaeth maternity grants grant mamolaeth maternity home cartref mamolaeth maternity homes cartref mamolaeth maternity hospital ysbyty mamolaeth maternity hospitals ysbyty mamolaeth maternity leave absenoldeb mamolaeth maternity leaves absenoldeb mamolaeth mathematical mathemategol mathematical argument dadl fathemategol mathematical arguments dadl fathemategol mathematical convention confensiwn mathemategol mathematical conventions confensiwn mathemategol mathematical explanation esboniad mathemategol mathematical explanations esboniad mathemategol mathematical induction anwythiad mathemategol mathematical inductions anwythiad mathematego