TermCymru

Results are displayed in English alphabetical order A-Z
English: OCRSO
Welsh: Swyddfa'r Prif Swyddog Ymchwil Gymdeithasol
Status C
Subject: Social services
Part of speech: Noun, Feminine, Singular
Definition: Office of the Chief Social Research Officer
Last Updated: 21 July 2005
English: OCSRO
Welsh: Swyddfa'r Prif Swyddog Ymchwil Gymdeithasol
Status C
Subject: Social services
Part of speech: Noun, Feminine, Singular
Definition: Office of the Chief Social Research Officer
Last Updated: 22 January 2008
English: OCT
Welsh: OCT
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Notes: Prawf diagnostig ym maes optometreg.
Last Updated: 4 June 2020
English: OCT
Welsh: Tomograffeg Cydlyniant Optegol
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Notes: Yng nghyd-destun optometreg. Dyma'r acronym Saesneg a ddefnyddir am Optical Coherence Tomography.
Last Updated: 25 February 2021
English: OCTO
Welsh: Swyddfa'r Prif Swyddog Technoleg
Status A
Subject: Welsh Government posts and departments
Part of speech: Noun, Feminine, Singular
Definition: Office of the Chief Technology Officer
Last Updated: 2 December 2005
English: octopus
Welsh: octopws
Status A
Subject: Agriculture
Part of speech: Noun, Masculine, Singular
Definition: Teulu’r Octopodidae
Last Updated: 19 March 2012
English: octylphenol
Welsh: octylffenol
Status C
Subject: Finance and statistics
Part of speech: Noun, Masculine, Singular
Last Updated: 1 November 2010
English: ocular
Welsh: ociwlar
Status A
Subject: Health
Part of speech: Adjective
Notes: Yng nghyd-destun gwasanaethau gofal llygaid.
Last Updated: 25 November 2022
English: ocular care
Welsh: gofal ociwlar
Status A
Subject: Health
Part of speech: Noun, Masculine, Singular
Notes: Yn gyffredinol mae'r term hwn yn gyfystyr ag 'eye care' ac fe'i defnyddir mewn cyd-destunau clinigol a thechnegol.
Last Updated: 25 November 2022
English: ocular condition
Welsh: cyflwr ociwlar
Status A
Subject: Health
Part of speech: Noun, Masculine, Singular
Plural: cyflyrau ociwlar
Notes: Yn gyffredinol mae'r term hwn yn gyfystyr ag 'eye condition' ac fe'i defnyddir mewn cyd-destunau clinigol a thechnegol.
Last Updated: 25 November 2022
English: ocular disease
Welsh: clefyd ociwlar
Status A
Subject: Health
Part of speech: Noun, Masculine, Singular
Plural: clefydau ociwlar
Notes: Yn gyffredinol mae'r term hwn yn gyfystyr ag 'eye disease' ac fe'i defnyddir mewn cyd-destunau clinigol a thechnegol.
Last Updated: 25 November 2022
English: ocular examination
Welsh: archwiliad ociwlar
Status A
Subject: Health
Part of speech: Noun, Masculine, Singular
Plural: archwiliadau ociwlar
Notes: Yn gyffredinol mae'r term hwn yn gyfystyr ag 'ocular disease' ac fe'i defnyddir mewn cyd-destunau clinigol a thechnegol.
Last Updated: 25 November 2022
English: ocular health
Welsh: iechyd ociwlar
Status A
Subject: Health
Part of speech: Noun, Masculine, Singular
Notes: Yn gyffredinol mae'r term hwn yn gyfystyr ag 'ocular health' ac fe'i defnyddir mewn cyd-destunau clinigol a thechnegol.
Last Updated: 25 November 2022
English: ocular hypertension
Welsh: gorbwysedd ocwlar
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Last Updated: 10 October 2016
English: ocular media
Welsh: cyfryngau ociwlar
Status B
Subject: Health
Part of speech: Noun, Plural
Definition: Y strwythurau sydd fel arfer yn dryloyw yn y llygad, gan gynnwys y gornbilen, y lens, yr hylif gwydrog a'r hylif dyfrllyd.
Last Updated: 25 March 2024
English: ocular pathology
Welsh: patholeg ociwlar
Status A
Subject: Health
Part of speech: Noun, Masculine, Singular
Definition: Yr astudiaeth o afiechydon y llygad a chrau'r llygad.
Last Updated: 25 November 2022
English: ocular therapeutics
Welsh: therapiwteg ociwlar
Status A
Subject: Health
Part of speech: Noun, Masculine, Singular
Definition: Yr astudiaeth o driniaethau ar gyfer anhwylderau'r llygaid a chrau'r llygad.
Last Updated: 25 November 2022
English: oculoplastic condition
Welsh: cyflwr ocwloblastig
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Notes: Yng nghyd-destun optometreg.
Last Updated: 25 February 2021
English: oculoplastics
Welsh: ocwloblasteg
Status B
Subject: Health
Part of speech: Noun, Feminine, Singular
Notes: Yng nghyd-destun optometreg.
Last Updated: 25 February 2021
English: OCVO
Welsh: OCVO
Status A
Subject: Welsh Government posts and departments
Part of speech: Noun, Feminine, Singular
Definition: Office of the Chief Veterinary Officer
Notes: Enw llawn: Swyddfa'r Prif Filfeddyg. Rhan o Grŵp yr Economi, Sgiliau a Chyfoeth Naturiol yn Llywodraeth Cymru. Ychwanegwyd y cofnod hwn Ionawr 2016.
Last Updated: 7 January 2016
English: OCW
Welsh: Canolfan Organig Cymru
Status C
Subject: Agriculture
Part of speech: Noun, Masculine, Singular
Definition: Organic Centre Wales
Last Updated: 30 January 2004
English: odds
Welsh: ods
Status B
Subject: Finance and statistics
Part of speech: Noun, Masculine, Singular
Definition: Disgrifiad o ba mor debygol yw rhywbeth o ddigwydd o’i gymharu â pha mor debygol yw o beidio â digwydd; fel arfer yn cael ei fynegi fel cymhareb megis “3:1”.
Notes: Cymharer â’r term probability / tebygolrwydd.
Last Updated: 21 January 2026
English: odds ratio
Welsh: cymhareb ods
Status B
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Plural: cymarebau ods
Notes: Cymharer â’r term probability / tebygolrwydd.
Last Updated: 21 January 2026
English: ODI
Welsh: Swyddfa Materion Anabledd
Status C
Subject: Social services
Part of speech: Noun, Feminine, Singular
Definition: Office for Disability Issues
Notes: Gweler yr erthygl ar y Model Cymdeithasol o Anabledd yn yr Arddulliadur. Yn unol â'r Model, mae amhariad ("impairment", a elwid yn "nam" o'r blaen) yn nodwedd ar berson, a all effeithio ar ei ymddangosiad neu ar sut y mae ei gorff neu ei feddwl yn gweithio; caiff pobl anabl (y gellir hefyd cyfeirio atynt fel "pobl anabledig" neu "bobl sy'n cael eu hanablu") eu hanablu gan ffactorau allanol fel yr amgylchedd, polisi neu arferion, neu yn sgil methiant i ddarparu addasiadau ar eu cyfer; ac anabledd yw canlyniad anablu pobl sydd ag amhariadau. 
Last Updated: 14 November 2023
English: odorising
Welsh: arogleiddio
Status C
Subject: Law
Part of speech: Verb
Last Updated: 30 April 2008
English: ODP
Welsh: ODP
Status C
Subject: Health
Part of speech: Neutral
Definition: operating department practitioner
Last Updated: 23 September 2004
English: ODPF
Welsh: Fforwm Partneriaeth Cyflawni Gweithredol
Status C
Subject: Agriculture
Part of speech: Noun, Masculine, Singular
Definition: Operational Delivery Partners Forum
Last Updated: 2 August 2012
English: ODPM
Welsh: ODPM
Status A
Subject: Politics
Part of speech: Noun, Feminine, Singular
Definition: Office of the Deputy Prime Minister
Context: Former UK Cabinet post.
Last Updated: 21 July 2005
English: ODTC
Welsh: Canolfan Diagnosteg a Thriniaeth Offthalmig
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Definition: Ophthalmic Diagnostic and Treatment Centre
Last Updated: 11 January 2013
English: OECD
Welsh: Y Sefydliad ar gyfer Cydweithrediad a Datblygiad Economaidd
Status A
Subject: Economic development
Part of speech: Proper noun, Masculine, Singular
Definition: Organisation for Economic Co-operation and Development
Last Updated: 23 December 2005
English: OECD Multi-level Governance Review: The Future of Regional Development and Investment in Wales
Welsh: Adolygiad yr OECD o Wahanol Haenau Llywodraethu: Dyfodol Datblygiad a Buddsoddiad Rhanbarthol yng Nghymru
Status B
Subject: Economic development
Part of speech: Noun, Masculine, Singular
Last Updated: 8 May 2025
English: oedema
Welsh: oedema
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Definition: Cyflwr lle bydd hylif dyfrllyd yn casglu yng nghelloedd a cheudodau'r corff.
Last Updated: 25 June 2020
English: OEGW
Welsh: SLlAC
Status A
Subject: Environment
Part of speech: Noun, Feminine, Singular
Notes: Dyma'r acronymau Cymraeg a Saesneg a ddefnyddir am Office of Environmental Governance Wales / Swyddfa Llywodraethiant Amgylcheddol Cymru.
Last Updated: 22 April 2025
English: OEM
Welsh: Gweithgynhyrchu Cyfarpar Gwreiddiol
Status C
Subject: Economic development
Part of speech: Verb
Definition: Original Equipment Manufacture
Last Updated: 2 February 2006
English: oenological practices
Welsh: arferion gwinyddol
Status A
Subject: Food
Part of speech: Noun, Plural
Definition: Y prosesau, triniaethau, technegau neu ddeunyddiau a ddefnyddir i gynhyrchu gwin.
Last Updated: 21 July 2022
English: OEP
Welsh: Swyddfa Diogelu'r Amgylchedd
Status B
Subject: Environment
Part of speech: Noun, Feminine, Singular
Notes: Dyma'r acronym Saesneg a ddefnyddir am Office of Environmental Protection.
Last Updated: 23 March 2021
English: oesophageal pH monitoring
Welsh: monitro pH oesoffagaidd
Status C
Subject: Health
Part of speech: Verb
Last Updated: 13 June 2011
English: oesophagus
Welsh: oesoffagws
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Last Updated: 3 March 2006
English: oestradiol preparation
Welsh: paratoad oestriadol
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Plural: paratoadau oestriadol
Definition: Meddyginiaeth a roddir fel rhan o driniaeth ar gyfer dysfforia rhywedd, ymysg cyflyrau eraill.
Last Updated: 17 April 2024
English: oestrogens
Welsh: oestrogenau
Status C
Subject: Agriculture
Part of speech: Noun, Plural
Last Updated: 16 October 2009
English: oestrus activity
Welsh: arwyddion gofyn tarw yn y fuches
Status C
Subject: Agriculture
Part of speech: Noun, Plural
Context: Yng nghyd-destun gwartheg.
Last Updated: 20 January 2010
English: oestrus suppression
Welsh: rhwystro…rhag mynd yn wasod
Status C
Subject: Agriculture
Part of speech: Verb
Last Updated: 16 October 2009
English: of African descent
Welsh: o dras Affricanaidd
Status B
Subject: Personnel
Part of speech: Adjective
Last Updated: 25 March 2021
English: of animal origin
Welsh: sy'n dod o anifeiliaid
Status B
Subject: Law
Part of speech: Adjective
Last Updated: 6 September 2024
English: Ofcom
Welsh: Ofcom
Status A
Subject: ICT
Part of speech: Neutral
Definition: Office of Communications
Last Updated: 2 September 2004
English: Offa
Welsh: Offa
Status A
Subject: Place-names
Part of speech: Proper noun
Notes: Ward etholiadol ym Mwrdeistref Sirol Wrecsam. Dyma'r enwau a ragnodwyd yn Gymraeg a Saesneg ar gyfer y ward yng Ngorchymyn Bwrdeistref Sirol Wrecsam (Trefniadau Etholiadol) 2021.
Last Updated: 17 August 2022
English: offal
Welsh: offal
Status C
Subject: Agriculture
Part of speech: Noun, Masculine, Singular
Last Updated: 29 July 2003
English: off balance sheet
Welsh: oddi ar y fantolen
Status A
Subject: Finance and statistics
Part of speech: Adjective
Definition: Trafodiadau lle nad yw'r cyllid a'r ased yn ymddangos ar y fantolen.
Notes: Term o faes cyfrifyddu.
Last Updated: 4 December 2018
English: OFFC
Welsh: Rheolau Bwyd a Phorthiant Swyddogol
Status C
Subject: Agriculture
Part of speech: Noun, Plural
Context: Official Feed and Food Controls
Last Updated: 23 March 2011
English: off-CE-marked
Welsh: heb farc CE
Status B
Subject: General
Part of speech: Adjective
Last Updated: 16 July 2020