TermCymru

Results are displayed in Welsh alphabetical order A-Y
Welsh: oriel letya
English: host gallery
Status B
Subject: Culture and the arts
Part of speech: Noun, Feminine, Singular
Plural: orielau lletya
Notes: Yng nghyd-destun Oriel Celf Gyfoes Genedlaethol i Gymru.
Last updated: 18 May 2023
Welsh: oriel newydd
English: new gallery
Status B
Subject: ICT
Part of speech: Noun, Feminine, Singular
Last updated: 19 July 2005
Welsh: o'r newydd
English: afresh
Status B
Subject: Education
Last updated: 14 February 2012
Welsh: oroffaryncs
English: oropharynx
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Definition: Cavity formed by the pharynx at the back of the mouth.
Last updated: 3 March 2006
Welsh: Oromo
English: Oromo
Status B
Subject: Culture and the arts
Part of speech: Noun, Feminine, Singular
Notes: Iaith
Last updated: 15 May 2019
Welsh: O'r Pridd i'r Plât
English: Farm to Fork
Status B
Subject: Agriculture
Part of speech: Adjective
Context: Enw ymgyrch.
Last updated: 5 December 2005
Welsh: o’r pridd i’r plât
English: from the plough to the plate
Status B
Subject: Agriculture
Part of speech: Preposition
Last updated: 22 September 2004
Welsh: O'r Pridd i'r Plât
English: Field to Fork
Status C
Subject: Environment
Part of speech: Preposition
Definition: Gweithdy a gaiff ei gynnal yng Ngŵyl y Gelli.
Last updated: 6 April 2011
Welsh: o'r syniad i'r sylwedd
English: from idea stage to delivery
Status C
Subject: Personnel
Part of speech: Preposition
Last updated: 6 July 2005
Welsh: orthodonteg
English: orthodontics
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Last updated: 6 May 2005
Welsh: orthodontig
English: orthodontic
Status B
Subject: Health
Part of speech: Adjective
Last updated: 10 July 2012
Welsh: orthodontydd arbenigol
English: specialist orthodontist
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Last updated: 10 July 2012
Welsh: orthopedeg
English: orthopaedics
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Last updated: 27 February 2006
Welsh: orthopteg
English: orthoptics
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Last updated: 17 October 2005
Welsh: orthoptydd
English: orthoptist
Status A
Subject: Health
Part of speech: Noun, Masculine, Singular
Plural: orthoptwyr
Definition: Clinigydd sy'n arbenigo mewn cynnal deiagnosis o broblemau â symudiad y llygad ac â'r ffordd mae'r ddwy lygad yn cydweithio, a thrin y problemau hynny.
Last updated: 25 November 2022
Welsh: orthotydd
English: orthotist
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Last updated: 5 September 2003
Welsh: o'r un rhyw
English: same-sex
Status B
Subject: General
Part of speech: Adjective
Last updated: 10 April 2024
Welsh: o'r un rhywedd
English: same-gender
Status B
Subject: General
Part of speech: Adjective
Last updated: 10 April 2024
Welsh: o rywfaint o ddiddordeb i Gymru
English: of some Welsh interest
Status B
Subject: Law
Part of speech: Adjective, Masculine, Singular
Definition: As defined in the Gifts to the Nation Scheme.
Last updated: 23 April 2012
Welsh: OS
English: OS
Status A
Subject: Planning
Part of speech: Noun, Masculine, Singular
Definition: Ordnance Survey
Last updated: 14 July 2005
Welsh: OS
English: SI
Status A
Subject: General
Part of speech: Noun, Masculine, Singular
Definition: statutory instrument
Last updated: 21 July 2005
Welsh: O.S. 2007/373 (Cy.33)
English: S.I. 2007/373 (W.33)
Status A
Subject: Titles of legislation
Part of speech: Noun, Masculine, Singular
Definition: Statutory Instrument. W = Wales
Last updated: 30 April 2007
Welsh: OSA
English: SSI
Status C
Subject: Law
Part of speech: Noun, Masculine, Singular
Definition: Scottish Statutory Instrument
Last updated: 5 February 2008
Welsh: o safon / ansawdd eilradd
English: seconds quality
Status C
Subject: Estates and Cadw
Definition: Yng nghyd-destun deunyddiau adeiladu.
Last updated: 5 June 2006
Welsh: Osbaston
English: Osbaston
Status A
Subject: Place-names
Part of speech: Proper noun
Notes: Ward etholiadol yn Sir Fynwy. Dyma'r enwau a ragnodwyd yn Gymraeg a Saesneg ar gyfer y ward yng Ngorchymyn Sir Fynwy (Trefniadau Etholiadol) 2021.
Last updated: 17 August 2022
Welsh: öosbôr
English: oospore
Status C
Subject: Plants
Part of speech: Noun, Masculine, Singular
Definition: sbôr rhywiol
Last updated: 1 September 2010
Welsh: oseltamifir
English: oseltamivir
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Definition: Cyffur gwrthfeirysol a ddefnyddir i atal a thrin ffliw mewn unigolion sy’n rhan o grwpiau risg.
Last updated: 6 November 2025
Welsh: osgoi dadneilltuo
English: avoiding decommitment
Status B
Subject: Europe
Part of speech: Verb
Last updated: 4 September 2002
Welsh: Osgoi'r Gwe-lywio
English: Skip Navigation
Status C
Subject: ICT
Part of speech: Verb
Last updated: 2 December 2004
Welsh: osgoi trethi
English: tax avoidance
Status A
Subject: Finance and statistics
Part of speech: Verb
Context: Legal
Last updated: 9 September 2014
Welsh: Osiris: Y Contract Menter Cyllid Preifat (PFI) ar gyfer Technoleg Gwybodaeth yng Nghynulliad Cenedlaethol Cymru
English: Osiris: The PFI Contract for Information Technology in the National Assembly for Wales
Status A
Subject: ICT
Part of speech: Noun, Masculine, Singular
Last updated: 23 January 2003
Welsh: OSKaR
English: OSKaR
Status C
Subject: Economic development
Definition: Observatory for a Sustainable Knowledge based Region.
Last updated: 11 October 2004
Welsh: osmiwm
English: osmium
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Symbol cemegol: Os
Notes: Elfen gemegol. Gweler y canllawiau sillafu termau benthyg gwyddonol ar BydTermCymru.
Last updated: 18 June 2025
Welsh: osôn
English: ozone
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Last updated: 11 July 2019
Welsh: Os na allwch ei ddal, allwch chi mo’i roi. Mae’r brechlyn wedi cyrraedd – ewch am eich pigiad nawr
English: If you can’t catch it, you can’t pass it on. The vaccine is here – get your jab now
Status C
Subject: Health
Context: Slogan on a swine flu poster.
Last updated: 27 January 2010
Welsh: os nad yw'r ymgeisydd wedi bod drwy broses graffu'r panel
English: unless the candidate has been scrutinised by the panel
Status C
Subject: Personnel
Last updated: 7 October 2002
Welsh: osôn ar lefel y ddaear
English: ground level ozone
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Last updated: 6 December 2005
Welsh: osôn ar lefel y ddaear
English: ground-level ozone
Status B
Subject: Environment
Part of speech: Noun, Masculine, Singular
Context: Nid yw osôn ar lefel y ddaear (O3) yn cael ei allyrru’n uniongyrchol, ond mae’n llygrydd eilaidd a ffurfir gan adweithiau cemegol yn yr atmosffer. Mae’r crynodiadau ar eu huchaf yn yr haf. Gall O3 deithio pellteroedd hir a chyrraedd crynodiadau uchel ymhell i ffwrdd o ffynhonnell y llygryddion gwreiddiol.
Last updated: 16 September 2024
Welsh: OSPAR
English: OSPAR
Status C
Subject: Environment
Part of speech: Noun, Feminine, Singular
Definition: Oslo-Paris Convention on the protection of the marine environment on the North East Atlantic
Context: Acronym ar gyfer Oslo-Paris Convention on the protection of the marine environment on the North East Atlantic / Confensiwn Oslo-Paris ar warchod yr amgylchedd morol yn rhan Ogledd-ddwyreiniol yr Iwerydd
Last updated: 5 March 2015
Welsh: osteopath
English: osteopath
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Plural: osteopathiaid
Context: Ystyr “osteopath” (“osteopath”) yw osteopath cofrestredig o fewn ystyr y term “registered osteopath”, fel y’i nodir yn adran 41 o Ddeddf Osteopathiaid 1993, ac sy’n cael ei reoleiddio gan y Cyngor Osteopathig Cyffredinol.
Notes: Daw'r testun cyd-destunol o Reoliadau Unigolion sydd wedi eu Hesemptio o ran Triniaethau Arbennig (Cymru) 2024.
Last updated: 13 June 2025
Welsh: osteoporosis
English: osteoporosis
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Last updated: 7 March 2008
Welsh: o stoc frodorol
English: native provenance
Status C
Subject: Agriculture
Part of speech: Adjective
Context: Am had/glasgoed.
Last updated: 24 November 2009
Welsh: o stoc leol
English: local provenance stock
Status C
Subject: Agriculture
Part of speech: Adjective
Last updated: 27 February 2006
Welsh: Os ydych chi'n yfed, peidiwch â meddwi
English: If you do do drink, don't do drunk
Status C
Subject: Education
Last updated: 9 January 2003
Welsh: OTF
English: OTF
Status A
Subject: Agriculture
Part of speech: Noun, Masculine, Singular
Notes: Dyma'r acronym a ddefnyddir yn y ddwy iaith am Officially TB Free / Statws heb TB swyddogol
Last updated: 23 March 2017
Welsh: OTFS
English: OTFS
Status A
Subject: Agriculture
Part of speech: Noun, Masculine, Singular
Notes: Dyma'r acronym a ddefnyddir yn y ddwy iaith am Officially TB Free Suspended / Statws heb TB swyddogol wedi'i atal
Last updated: 23 March 2017
Welsh: OTFW
English: OTFW
Status A
Subject: Agriculture
Part of speech: Noun, Masculine, Singular
Notes: Dyma'r acronym a ddefnyddir yn y ddwy iaith am Officially TB Free Withdrawn / Statws heb TB swyddogol wedi'i ddiddymu
Last updated: 23 March 2017
Welsh: otolith
English: otolith
Status A
Subject: Animals
Part of speech: Noun, Masculine, Singular
Plural: otolithau
Definition: Asgwrn bychan ym mhennau pysgod.
Last updated: 28 February 2019
Welsh: o un flwyddyn i'r llall
English: year on year
Status A
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Context: Gall "blwyddyn ar ôl blwyddyn" neu "o flwyddyn i flwyddyn" fod yn briodol yn ôl y cyd-destun.
Last updated: 10 February 2003
Welsh: Our Energy Challenge
English: Our Energy Challenge
Status C
Subject: Economic development
Definition: Dogfen ymgynghori Llywodraeth y DU ar ynni.
Last updated: 27 February 2006