TermCymru

Results are displayed in English alphabetical order A-Z
English: owner-occupied
Welsh: yn eiddo i berchen-feddianwyr
Status B
Subject: Housing
Part of speech: Noun, Feminine, Singular
Last Updated: 13 January 2012
English: owner-occupier
Welsh: perchen-feddiannydd
Status A
Subject: Housing
Part of speech: Noun, Masculine, Singular
Plural: perchen-feddianwyr
Definition: person sy'n berchen cyfreithiol ar yr annedd y mae'n ei meddiannu
Context: Un o'r buddiannau mewn tir sy'n gymwys i'w ddiogelu yw buddiant perchen-feddiannydd hereditament (sef hereditament perthnasol o fewn ystyr adran 64(4)(a) i (c) o Ddeddf Cyllid Llywodraeth Leol 1988) pan na fydd gwerth blynyddol yr hereditament yn fwy nag unrhyw swm a ragnodir gan yr Ysgrifennydd Gwladol (adran 149(3)(a) o'r Ddeddf).
Last Updated: 16 November 2021
English: owner of land
Welsh: perchennog tir
Status A
Subject: Law
Part of speech: Noun, Masculine, Singular
Plural: perchnogion tir
Notes: Mewn ymadroddion lle mae'r ddwy elfen yn amhenodol (hy wrth drosi "an owner of land"), gellid defnyddio 'perchennog ar dir'.
Last Updated: 12 November 2024
English: ownership
Welsh: perchnogaeth
Status A
Subject: Law
Part of speech: Noun, Feminine, Singular
Plural: perchnogaethau
Definition: hawl person i ddal rhywbeth yn eiddo iddo ei hun i'w ddefnyddio fel y myn
Context: Rhaid i berson sy’n trosglwyddo perchnogaeth ceffyl i berson arall (y “trosglwyddai”) ddarparu dogfen adnabod y ceffyl hwnnw i’r trosglwyddai adeg y trosglwyddo.
Last Updated: 16 November 2021
English: Ownership Housing Cooperatives
Welsh: Mentrau Cydweithredol Perchenogaeth Tai
Status C
Subject: Housing
Last Updated: 12 September 2007
English: ownership in common
Welsh: perchnogaeth ar y cyd
Status A
Subject: Housing
Part of speech: Noun, Feminine, Singular
Notes: Weithiau defnyddir y term Saesneg 'common ownership' am yr un cysyniad.
Last Updated: 7 August 2017
English: Own Initiative investigation
Welsh: ymchwiliad ar ei Ysgogiad ei Hun
Status A
Subject: General
Part of speech: Noun, Masculine, Singular
Plural: ymchwiliadau ar ei Ysgogiad ei Hun
Definition: Ymchwiliad a gynhelir gan Ombwdsmon neu Gomisiynydd heb fod wedi derbyn cwyn ynghylch y mater dan sylw.
Notes: Gellir addasu'r ffurf gan ddibynnu ar y cyd-destun, ee ymchwiliad ar ei Hysgogiad ei Hun.
Last Updated: 9 October 2025
English: own-price elasticity
Welsh: elastigedd pris y nwydd ei hun
Status A
Subject: Finance and statistics
Part of speech: Noun, Masculine, Singular
Definition: When different beverages are considered (e.g., beer, wine, sprits), the elasticities can be classified as own- and cross-price elasticities, with own-price elasticities indicating the percentage change in the demand for one type of alcohol due to a 1% change in the price of this type of alcohol, and cross-price elasticities indicating the percentage change in demand for one type of alcohol due to a 1% change in the price of another type of alcohol.
Context: Bydd i ba raddau y mae hyn yn digwydd yn dibynnu ar ymatebolrwydd defnyddwyr i bris, hy elastigedd pris y nwydd ei hun (PED) a thrawselastigedd y pris (XED), a fydd yn pennu’r newidiadau i ymddygiad defnyddio a newid. Mae PED yn cynrychioli canran y newid yn y galw am alcohol o fath penodol oherwydd newid o 1% ym mhris y math hwnnw o alcohol. Mae’n fesur o sut y mae defnyddwyr yn ymateb i newid mewn pris.
Last Updated: 18 August 2017
English: oxalate
Welsh: ocsalad
Status B
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Halen neu ester sy’n deillio o asid ocsalig.
Last Updated: 4 December 2025
English: oxalic acid
Welsh: asid ocsalig
Status B
Subject: Environment
Part of speech: Noun, Masculine, Singular
Last Updated: 4 December 2025
English: ox bile powder
Welsh: powdr bustl eidion
Status C
Subject: Food
Part of speech: Noun, Masculine, Singular
Last Updated: 7 June 2007
English: oxbow lake
Welsh: ystumllyn
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Curved lake found on the flood plain of a river. Oxbows are caused by the loops of meanders that are cut off at times of flood and the river subsequently adopts a shorter course.
Last Updated: 5 December 2011
English: ox-eye daisy
Welsh: llygad-llo mawr
Status A
Subject: Plants
Part of speech: Noun, Masculine, Singular
Definition: leucanthemum vulgare
Last Updated: 21 June 2022
English: Oxfam Cymru
Welsh: Oxfam Cymru
Status A
Subject: Social services
Part of speech: Neutral
Last Updated: 10 March 2008
English: Oxford AstraZeneca vaccine
Welsh: brechlyn Prifysgol Rhydychen-AstraZeneca
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Notes: Brechlyn ar gyfer COVID-19. Sylwer y gall yr enw Saesneg cael ei ddefnyddio gyda chysylltnod (Oxford-AstraZeneca) neu flaenslaes (Oxford/AstraZeneca). Argymhellir cysylltnod yn y term Cymraeg yn ddiwahan, er cysondeb mewn testunau Cymraeg. Enw answyddogol yw hwn ar y brechlyn, sydd i raddau yn esbonio'r amrywiadau a geir yn yr orgraff yn Saesneg.
Last Updated: 14 January 2021
English: Oxford ragwort
Welsh: creulys Rhydychen
Status C
Subject: Plants
Part of speech: Noun, Feminine, Singular
Last Updated: 20 August 2008
English: Oxfordshire
Welsh: Swydd Rydychen
Status A
Subject: Place-names
Part of speech: Proper noun
Notes: Enw sir yn Lloegr. Safonwyd y ffurf hon gan Banel Safoni Enwau Lleoedd Comisiynydd y Gymraeg fel rhan o restr o siroedd Lloegr. Am ragor o wybodaeth am y prosiect safoni hwn, gweler gwefan Comisiynydd y Gymraeg.
Last Updated: 17 June 2025
English: oxidisation
Welsh: ocsideiddiad
Status C
Subject: Agriculture
Part of speech: Noun, Masculine, Singular
Last Updated: 21 October 2009
English: oxidisation
Welsh: ocsidio
Status C
Subject: Agriculture
Part of speech: Verb
Last Updated: 21 October 2009
English: oxidise
Welsh: ocsidio
Status C
Subject: Agriculture
Part of speech: Verb
Last Updated: 21 October 2009
English: oxo-biodegradable
Welsh: ocso-fioddiraddadwy
Status A
Subject: Environment
Part of speech: Adjective
Definition: Y gallu i ddiraddio o ganlyniad i ffenomena ocsideiddio a ffenomena a gyfryngir gan gelloedd, naill ai ar yr un pryd neu'r naill ar ôl y llall.
Last Updated: 13 October 2022
English: oxo-degradable plastic
Welsh: plastig ocso-ddiraddadwy
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Plastig yn cynnwys ychwanegion sy'n cyflymu diraddiad y plastig pan fydd yn dod i gysylltiad â gwres neu oleuni (p'run a ydy hynny, neu y gallai hynny fod, yn cael ei ddilyn gan ddadelfenniad rhannol neu lawn y deunydd gan weithred microbau, neu beidio).
Last Updated: 13 October 2022
English: oxygen
Welsh: ocsigen
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Symbol cemegol: O
Notes: Elfen gemegol. Gweler y canllawiau sillafu termau benthyg gwyddonol ar BydTermCymru.
Last Updated: 18 June 2025
English: oxygenator plants
Welsh: planhigion ocsigenu
Status C
Subject: Environment
Part of speech: Noun, Plural
Last Updated: 29 October 2010
English: oxygen flow
Welsh: llif ocsigen
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Last Updated: 13 December 2010
English: oxygen mask
Welsh: masg ocsigen
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Plural: masgiau ocsigen
Last Updated: 23 November 2020
English: oxygen saturation
Welsh: dirlawnder ocsigen
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Last Updated: 13 December 2010
English: oxygen therapy
Welsh: therapi ocsigen
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Last Updated: 10 February 2004
English: Oxygen Therapy Reference Group
Welsh: Y Grŵp Cyfeirio Therapi Ocsigen
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Last Updated: 4 April 2005
English: oxytocic
Welsh: ocsitocic
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Plural: ocsitocicau
Last Updated: 6 November 2019
English: OY
Welsh: cyweiniad optimwm
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: optimum yield
Context: of fish
Last Updated: 2 April 2013
English: oyster
Welsh: wystrysen
Status C
Subject: Animals
Part of speech: Noun, Feminine, Singular
Definition: Rhywogaethau Crassostrea ac Ostreal Crassostrea and Ostrea spp.
Context: Lluosog: wystrys. Gelwir yn "llymarch, llymeirch" hefyd.
Last Updated: 14 November 2007
English: Oyster Bank
Welsh: Banc yr Wystrys
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: The Oyster Bank at Pwllheli is a sheltered area of mud and sand bottom with stabilised pebbles and shells including small cobbles and pebbles in a muddy matrix. The site lies at a depth of 8 m within Tremadog Bay which is in the Pen Llyn Sarnau marine SAC
Context: Cyfieithiad Cyngor Gwynedd
Last Updated: 27 January 2010
English: oystercatcher
Welsh: pioden fôr
Status A
Subject: Birds
Part of speech: Noun, Feminine, Singular
Definition: Haematopus ostralegus
Last Updated: 20 September 2005
English: Oystermouth
Welsh: Ystumllwynarth
Status A
Subject: Place-names
Part of speech: Proper noun
Last Updated: 20 May 2004
English: oyster sauce
Welsh: saws wystrys
Status C
Subject: Food
Part of speech: Noun, Masculine, Singular
Last Updated: 8 November 2011
English: ozone
Welsh: osôn
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Last Updated: 11 July 2019
English: ozone-enriched air treatment
Welsh: triniaeth aer a gyfoethogir ag osôn
Status C
Subject: Food
Part of speech: Noun, Feminine, Singular
Notes: Mewn perthynas â thrin dŵr mwynol
Last Updated: 5 July 2017
English: ozone layer
Welsh: yr haen osôn
Status C
Subject: Law
Part of speech: Noun, Feminine, Singular
Last Updated: 30 March 2005
English: P2P
Welsh: prynu i dalu
Status C
Subject: Economic development
Part of speech: Verb
Definition: purchase to pay
Last Updated: 31 December 2008
English: P2P Match Funding Manager
Welsh: Rheolwr Arian Cyfatebol P2P
Status C
Subject: Welsh Government posts and departments
Part of speech: Noun, Masculine, Singular
Definition: P2P = Pathways to Prosperity
Last Updated: 11 June 2007
English: P4C
Welsh: Athroniaeth ar gyfer Plant
Status C
Subject: Education
Part of speech: Noun, Feminine, Singular
Definition: Philosophy for Children
Last Updated: 3 September 2008
English: PA
Welsh: Cynorthwyydd Personol
Status C
Subject: Personnel
Part of speech: Noun, Masculine, Singular
Last Updated: 15 April 2008
English: PA
Welsh: cyrhaeddiad blaenorol
Status B
Subject: Education
Part of speech: Noun, Masculine, Singular
Notes: Dyma'r acronym a ddefnyddir yn Saesneg am Prior Attainment.
Last Updated: 28 November 2019
English: PABEW
Welsh: Bwrdd Cynghori’r Heddlu ar gyfer Cymru a Lloegr
Status C
Subject: Justice and order
Part of speech: Noun, Masculine, Singular
Definition: Police Advisory Board for England and Wales
Last Updated: 25 November 2009
English: PAC
Welsh: Iawndal Amaeth-ariannol y Premiwm
Status C
Subject: Agriculture
Part of speech: Noun, Masculine, Singular
Definition: Premium Agrimonetary Compensation
Last Updated: 15 September 2005
English: PACE
Welsh: Deddf yr Heddlu a Thystiolaeth Droseddol 1984
Status A
Subject: Titles of legislation
Part of speech: Noun, Feminine, Singular
Definition: Police and Criminal Evidence Act 1984
Last Updated: 9 June 2008
English: pace
Welsh: bwrlwm
Status C
Subject: Personnel
Part of speech: Noun, Masculine, Singular
Definition: Un o werthoedd newydd y gwasanaeth sifil.
Last Updated: 11 May 2006
English: PACE
Welsh: Gwerthuso Canolfan drwy Asesiad Cadarnhaol
Status C
Subject: Personnel
Part of speech: Verb
Definition: Positive Assessment Centre Evaluation
Last Updated: 13 May 2013
English: pacemaker
Welsh: rheolydd calon
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Last Updated: 17 July 2006