TermCymru

Results are displayed in Welsh alphabetical order A-Y
Welsh: ewropiwm
English: europium
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Symbol cemegol: Eu
Notes: Elfen gemegol. Gweler y canllawiau sillafu termau benthyg gwyddonol ar BydTermCymru.
Last updated: 18 June 2025
Welsh: ewthanasia
English: euthanasia
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Definition: Y weithred o roi diwedd ar fywyd person arall yn fwriadol er mwyn atal dioddefaint.
Last updated: 9 April 2025
Welsh: ewthanasia anwirfoddol
English: non-voluntary euthanasia
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Definition: Ewthanasia lle bydd person yn methu cydsynio i farw (er enghraifft, am eu bod mewn coma) a bod person arall yn gwneud y penderfyniad dros y person hwnnw, efallai am iddynt fynegi dymuniad yn y gorffennol i hynny ddigwydd.
Last updated: 9 April 2025
Welsh: ewthanasia gwirfoddol
English: voluntary euthanasia
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Definition: Ewthanasia lle bydd person yn gwneud penderfyniad ymwybodol i farw, ac yn gofyn i rywun arall ei helpu i wneud hynny.
Last updated: 9 April 2025
Welsh: ewthaneiddio
English: euthanize
Status B
Subject: Health
Part of speech: Verb
Last updated: 8 October 2020
Welsh: ewtroffeiddio
English: eutrophicate
Status C
Subject: Agriculture
Part of speech: Verb
Last updated: 17 October 2005
Welsh: ewtroffig
English: eutrophic
Status C
Subject: Agriculture
Part of speech: Adjective
Last updated: 17 October 2005
Welsh: ewtroffigedd
English: eutrophication
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Pan fydd corff o ddŵr yn gorlenwi â maethynnau, sy'n arwain at ordyfiant algae.
Context: tymereddau uwch a all effeithio ar farwoldeb pathogenau a hybu twf algâu ac ewtroffigedd;
Last updated: 6 June 2019
Welsh: ewtroffigedd a achosir gan bobl
English: human-induced eutrophication
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Ewtroffigedd sy'n digwydd yn sgil gweithgarwch dynol.
Context: Caiff ewtroffigedd a achosir gan bobl ei leihau i'r eithaf, yn enwedig yr effeithiau niweidiol ohono, fel colli bioamrywiaeth, diraddio ecosystemau, gordyfiant o algâu a diffyg ocsigen yn y dyfroedd isaf.
Last updated: 6 June 2019
Welsh: ewyllys da
English: goodwill
Status C
Subject: Law
Part of speech: Noun, Masculine, Singular
Last updated: 24 July 2008
Welsh: ewyn inswleiddio
English: foam insulation
Status B
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: insulating material made from plastic solidified in a lightweight cellular mass
Last updated: 9 August 2017
Welsh: ExCo
English: ExCo
Status B
Subject: Welsh Government posts and departments
Part of speech: Proper noun
Context: Y Pwyllgor Gweithredol (ExCo) yw'r fforwm gwneud penderfyniadau strategol sy'n fy nghefnogi fel Prif Gynghorydd Polisi'r Prif Weinidog, Prif Swyddog Cyfrifyddu a Phennaeth Gwasanaeth Sifil Llywodraeth Cymru.
Notes: Enw a ddefnyddir am yr Executive Committee / Pwyllgor Gweithredol, rhan o drefniadau llywodraethiant mewnol Llywodraeth Cymru.
Last updated: 24 October 2024
Welsh: ex officio
English: ex officio
Status A
Subject: Honorary titles
Definition: By virtue of his office.
Last updated: 27 May 2004
Welsh: Expo 2007
English: Expo 2007
Status C
Subject: Personnel
Part of speech: Neutral
Definition: Achlysur a gynhelir gan PSMW yn Ionawr 2007.
Last updated: 21 September 2006
Welsh: Expo 2009 - Gweithio mewn Cytgord
English: Expo 2009 - Working in Harmony
Status A
Subject: Local government
Definition: Held at City Hall, Cardiff.
Last updated: 4 February 2009
Welsh: Expo y Byd Dubai 2021-22
English: World Expo Dubai 2021-22
Status B
Subject: Economic development
Part of speech: Noun, Masculine, Singular
Last updated: 12 November 2020
Welsh: Expo y Rhaglen Cyfnewid Pobl 2007
English: People Exchange Wales Expo 2007
Status C
Subject: Personnel
Part of speech: Noun, Masculine, Singular
Definition: Achlysur a gynhelir gan PSMW yn Ionawr 2007.
Last updated: 21 September 2006
Welsh: ExtraCare
English: ExtraCare
Status C
Subject: Housing
Part of speech: Proper noun
Definition: Type of accommodation for older people.
Last updated: 26 October 2004
Welsh: e.ysgol.iach
English: health.e.school
Status A
Subject: Health
Part of speech: Neutral
Definition: Health Promotion Division website
Last updated: 23 February 2004
Welsh: EYST Cymru
English: EYST Wales
Status A
Subject: General
Part of speech: Noun, Masculine, Singular
Notes: Dyma'r ffurf fer ar enw'r elusen Ethnic Minorities & Youth Support Team / Tîm Lleiafrifoedd Ethnig ac Ieuenctid Cymru.
Last updated: 5 March 2025
Welsh: FAB Cymru
English: FAB Wales
Status C
Subject: Economic development
Part of speech: Neutral
Last updated: 20 October 2011
Welsh: Faenor
English: Vaynor
Status A
Subject: Place-names
Part of speech: Proper noun
Definition: Merthyr Tudful
Last updated: 14 August 2003
Welsh: Faenor
English: Faenor
Status A
Subject: Place-names
Part of speech: Proper noun
Notes: Ward etholiadol yn Sir Ceredigion. Dyma'r enwau a ragnodwyd yn Gymraeg a Saesneg ar gyfer y ward yng Ngorchymyn Sir Ceredigion (Trefniadau Etholiadol) 2021.
Last updated: 17 August 2022
Welsh: Faenor
English: Vaynor
Status A
Subject: Place-names
Part of speech: Proper noun
Notes: Ward etholiadol ym Mwrdeistref Sirol Merthyr Tudful. Dyma'r enwau a ragnodwyd yn Gymraeg a Saesneg ar gyfer y ward yng Ngorchymyn Bwrdeistref Sirol Merthyr Tudful (Trefniadau Etholiadol) 2021.
Last updated: 17 August 2022
Welsh: faint o nitrogen sydd ei angen ar y cnwd
English: crop nitrogen requirement
Status C
Subject: Agriculture
Part of speech: Noun, Masculine, Singular
Last updated: 30 October 2009
Welsh: Fairbourne
English: Fairbourne
Status A
Subject: Place-names
Part of speech: Proper noun
Definition: Enw lle yng Ngwynedd. Cytunodd Tîm Safoni Enwau Lleoedd Bwrdd yr Iaith â Chyngor Gwynedd yn 2008 fod 'Fairbourne' ac 'Y Friog' yn ddau le gwahanol, yn groes i gyngor y Rhestr o Enwau Lleoedd ('Gazetteer').
Last updated: 4 June 2014
Welsh: Fairbridge Cymru
English: Fairbridge Cymru
Status A
Subject: Social services
Part of speech: Neutral
Definition: Elusen genedlaethol sydd yn cefnogi pobl ifanc rhwng 13 a 25 mewn 15 o ardaloedd mwyaf difreintiedig Prydain i fagu hyder, cymhelliad a'r sgiliau sydd eu hangen arnynt i newid eu bywydau.
Last updated: 20 August 2008
Welsh: Fairwater
English: Fairwater
Status B
Subject: Place-names
Part of speech: Proper noun
Definition: Gwent. GOFAL! Peidiwch â chymysgu â’r Tyllgoed, Caerdydd
Last updated: 14 August 2003
Welsh: Fairwater
English: Fairwater
Status A
Subject: Place-names
Part of speech: Proper noun
Notes: Ward etholiadol ym Mwrdeistref Sirol Torfaen. Dyma'r enwau a ragnodwyd yn Gymraeg a Saesneg ar gyfer y ward yng Ngorchymyn Bwrdeistref Sirol Torfaen (Trefniadau Etholiadol) 2021.
Last updated: 17 August 2022
Welsh: Fairwood
English: Fairwood
Status A
Subject: Place-names
Part of speech: Proper noun
Notes: Ward etholiadol yn Ninas a Sir Abertawe. Dyma'r enwau a ragnodwyd yn Gymraeg a Saesneg ar gyfer y ward yng Ngorchymyn Dinas a Sir Abertawe (Trefniadau Etholiadol) 2021.
Last updated: 17 August 2022
Welsh: falens
English: valency
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Plural: falensau
Definition: Yng nghyd-destun brechlynnau, gallu brechlyn i ennyn ymateb imiwnyddol i wahanol feirysau, i wahanol straeniau o un feirws, i wahanol feicro-organebau etc.
Last updated: 1 September 2022
Welsh: falf anadlu allan
English: exhalation valve
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Definition: Yng nghyd-destun ffliw adar.
Last updated: 27 October 2005
Welsh: falf arnofio
English: floatvalve
Status B
Subject: Agriculture
Part of speech: Noun, Feminine, Singular
Last updated: 28 August 2012
Welsh: falf ddwylen
English: bicuspid valve
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Last updated: 6 December 2005
Welsh: falf deirlen
English: tricuspid valve
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Last updated: 6 December 2005
Welsh: falf gilgant
English: semi-lunar valve
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Last updated: 6 December 2005
Welsh: falfiau gwrthlosgi
English: anti-scald valves
Status C
Subject: Planning
Part of speech: Noun, Plural
Last updated: 5 October 2005
Welsh: falfiau thermostatig rheiddiadur
English: thermostatic radiator valves
Status C
Subject: Environment
Part of speech: Noun, Plural
Definition: TRVs
Last updated: 26 January 2009
Welsh: falfiau thermostatig rheiddiadur
English: TRVs
Status C
Subject: Environment
Part of speech: Noun, Plural
Definition: thermostatic radiator valves
Last updated: 25 April 2012
Welsh: falf rheoli llygredd
English: pollution control valve
Status C
Subject: Environment
Part of speech: Noun, Feminine, Singular
Last updated: 23 October 2003
Welsh: falf y galon
English: heart valve
Status A
Subject: Health
Part of speech: Noun, Feminine, Singular
Context: Lluosog: falfiau'r galon.
Last updated: 14 August 2013
Welsh: falf ynysu llygredd
English: pollution isolation valve
Status C
Subject: Environment
Part of speech: Noun, Feminine, Singular
Last updated: 23 October 2003
Welsh: Family Housing Association Ltd
English: Family Housing Association Ltd
Status C
Subject: Housing
Last updated: 12 June 2006
Welsh: Fampirod Ynni
English: Energy Vampiers
Status C
Subject: Environment
Part of speech: Noun, Plural
Definition: Un o raglenni 'Cadwch Gymru'n Daclus'.
Last updated: 5 April 2011
Welsh: fanadiwm
English: vanadium
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Symbol cemegol: V
Notes: Elfen gemegol. Gweler y canllawiau sillafu termau benthyg gwyddonol ar BydTermCymru.
Last updated: 18 June 2025
Welsh: faniau sy'n deillio o geir
English: car derived vans
Status C
Subject: Transport
Part of speech: Noun, Plural
Last updated: 6 May 2005
Welsh: FareShare
English: FareShare
Status A
Subject: Social services
Part of speech: Proper noun
Definition: Registered UK charity.
Last updated: 18 June 2013
Welsh: farisela
English: varicella
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Notes: Dyma’r term meddygol technegol am chickenpox / brech yr ieir. Sylwer y Cymreigir y ffurf sy’n enw ar yr haint, ond nid enw’r feirws ei hun, Varicella-zoster.
Last updated: 6 November 2025
Welsh: farnais fflworid
English: fluoride varnish
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Last updated: 10 July 2012
Welsh: Farndon
English: Farndon
Status A
Subject: Place-names
Part of speech: Proper noun
Definition: Lle yn Lloegr.
Context: Nid Rhedynfre.
Last updated: 2 May 2013