TermCymru

Results are displayed in English alphabetical order A-Z
English: ORP
Welsh: Y Rhaglen Ôl-osod er mwyn Optimeiddio
Status B
Subject: Environment
Part of speech: Noun, Feminine, Singular
Notes: Dyma'r acronym Saesneg a ddefnyddir am yr Optimised Retrofit Programme.
Last Updated: 5 August 2020
English: orphan building
Welsh: adeilad amddifad
Status B
Subject: Fire and rescue
Part of speech: Noun, Masculine, Singular
Plural: adeiladau amddifad
Definition: Adeilad lle nad oes datblygwr, yswiriwr neu asiant rheoli y gellir ei ddal yn gyfrifol am ddiogelwch tân.
Last Updated: 22 June 2023
English: orphan medicine
Welsh: meddyginiaeth amddifad
Status A
Subject: Health
Part of speech: Noun, Feminine, Singular
Last Updated: 6 January 2014
English: ORR
Welsh: Y Swyddfa Rheilffyrdd a Ffyrdd
Status A
Subject: Transport
Part of speech: Noun, Feminine, Singular
Notes: Dyma’r acronym Saesneg a ddefnyddir am Office of Rail and Road.
Last Updated: 3 December 2025
English: ORSAS
Welsh: Y Cynllun Gwobrau i Fyfyrwyr Ymchwil Tramor
Status C
Subject: Education
Part of speech: Noun, Masculine, Singular
Definition: Overseas Research Students Awards Scheme
Last Updated: 2 July 2008
English: orthodontic
Welsh: orthodontig
Status B
Subject: Health
Part of speech: Adjective
Last Updated: 10 July 2012
English: orthodontic appliance
Welsh: cyfarpar orthodontig
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Last Updated: 2 April 2020
English: orthodontic contract
Welsh: contract orthodontig
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Plural: contractau orthodontig
Context: Bydd gofyn i bob deiliad contract deintyddol, ac eithrio contractau orthodontig, ailadrodd yr archwiliad gwrthficrobaidd a gynhaliwyd yn 2023/24, ei gymharu â'r canfyddiadau blaenorol a chynnal trafodaeth â staff y practis i nodi unrhyw gamau y mae eu hangen i wella rhagnodi gwrthfiotigau.
Last Updated: 6 March 2025
English: orthodontic extraction
Welsh: echdyniad orthodontig
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Plural: echdyniadau orthodontig
Last Updated: 13 September 2018
English: Orthodontic Managed Clinical Network
Welsh: Rhwydwaith Clinigol a Reolir ym maes Orthodonteg
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Plural: Rhwydweithiau Clinigol a Reolir ym maes Orthodonteg
Last Updated: 13 September 2018
English: orthodontics
Welsh: orthodonteg
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Last Updated: 6 May 2005
English: orthographic
Welsh: orgraffyddol
Status B
Subject: Culture and the arts
Part of speech: Adjective
Definition: Yn ymwneud â'r orgraff, sef system sillafu iaith.
Notes: Term o faes ieithyddiaeth a ddefnyddir mewn deunyddiau sy’n gysylltiedig â CEFR, y Fframwaith Cyfeirio Cyffredin Ewropeaidd ar gyfer Ieithoedd.
Last Updated: 2 October 2025
English: orthopaedic care
Welsh: gofal orthopaedig
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Last Updated: 19 March 2025
English: orthopaedic consultant
Welsh: ymgynghorydd orthopaedig
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Plural: ymgynghorwyr orthopaedig
Last Updated: 23 September 2025
English: orthopaedic hub
Welsh: canolfan orthopaedig
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Plural: canolfannau orthopaedig
Last Updated: 19 March 2025
English: orthopaedic implant
Welsh: mewnblaniad orthopaedig
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Plural: mewnblaniadau orthopaedig
Last Updated: 11 December 2025
English: orthopaedic pathway
Welsh: llwybr orthopedig
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Plural: llwybrau orthopedig
Last Updated: 4 May 2023
English: orthopaedic plan for Wales
Welsh: cynllun orthopedig ar gyfer Cymru
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Last Updated: 2 July 2004
English: Orthopaedic Programme Manager
Welsh: Rheolwr y Rhaglen Orthopedig
Status A
Subject: Welsh Government posts and departments
Part of speech: Noun, Masculine, Singular
Notes: Teitl swydd yng Ngweithrediaeth y GIG.
Last Updated: 4 May 2023
English: orthopaedics
Welsh: orthopedeg
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Last Updated: 27 February 2006
English: orthopaedic services
Welsh: gwasanaethau orthopedig
Status C
Subject: Health
Part of speech: Noun, Plural
Last Updated: 4 May 2023
English: orthopaedic summit
Welsh: uwchgynhadledd orthopedig
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Last Updated: 4 May 2023
English: orthopaedic surgery
Welsh: llawdriniaeth orthopedig
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Last Updated: 17 July 2006
English: orthoptics
Welsh: orthopteg
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Last Updated: 17 October 2005
English: orthoptist
Welsh: orthoptydd
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
English: orthotist
Welsh: orthotydd
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Last Updated: 5 September 2003
English: OS
Welsh: OS
Status A
Subject: Planning
Part of speech: Noun, Masculine, Singular
Definition: Ordnance Survey
Last Updated: 14 July 2005
English: OSAG
Welsh: Grŵp Cynghori Arbenigwyr Offthalmig
Status A
Subject: Health
Part of speech: Proper noun, Masculine, Singular
Definition: Opthalmic Specialist Advisory Group
Last Updated: 30 October 2012
English: Osbaston
Welsh: 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
English: OSCHR
Welsh: Swyddfa Cydlynu Strategol Ymchwil i Iechyd
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Definition: Office for Strategic Co-ordination of Health Research
Last Updated: 13 May 2008
English: OSCT
Welsh: Swyddfa Diogelwch a Gwrthderfysgaeth
Status C
Subject: Justice and order
Part of speech: Proper noun, Feminine, Singular
Definition: Office for Security and Counter Terrorism
Last Updated: 17 October 2012
English: OS datum
Welsh: seilnod yr Arolwg Ordnans
Status B
Subject: Planning
Part of speech: Noun, Masculine, Singular
Definition: Lefel safonedig dŵr môr, y mae’r cyfuchlinau a phwyntiau uchder ar fapiau tir yn cael eu mesur ohoni. Yn achos y DU, mae seilnod yr Arolwg Ordnans yn seiliedig ar fesuriad yn Newlyn, Cernyw.
Notes: Cymharer â chart datum / seilnod siart, y mesurir dyfnderoedd ar fapiau mordwyo ohoni.
Last Updated: 17 February 2025
English: oseltamivir
Welsh: oseltamifir
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
English: OS field number
Welsh: rhif OS y cae
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Last Updated: 23 September 2004
English: OSHL
Welsh: dysgu y tu allan i oriau ysgol
Status C
Subject: Education
Part of speech: Verb
Definition: out of school hours learning
Last Updated: 29 January 2008
English: osiers
Welsh: helyg gwiail
Status C
Subject: Environment
Part of speech: Noun, Plural
Definition: common osiers s. viminalis
Last Updated: 29 July 2003
English: osier willow
Welsh: helygen wiail
Status C
Subject: Environment
Part of speech: Noun, Feminine, Singular
Last Updated: 3 October 2003
English: Osiris: The PFI Contract for Information Technology in the National Assembly for Wales
Welsh: Osiris: Y Contract Menter Cyllid Preifat (PFI) ar gyfer Technoleg Gwybodaeth yng Nghynulliad Cenedlaethol Cymru
Status A
Subject: ICT
Part of speech: Noun, Masculine, Singular
Last Updated: 23 January 2003
English: OSKaR
Welsh: OSKaR
Status C
Subject: Economic development
Definition: Observatory for a Sustainable Knowledge based Region.
Last Updated: 11 October 2004
English: Oslo-Paris Convention on the protection of the marine environment on the North East Atlantic
Welsh: Confensiwn Oslo-Paris ar warchod yr amgylchedd morol yn rhan Ogledd-ddwyreiniol yr Iwerydd
Status C
Subject: Environment
Part of speech: Proper noun
Definition: OSPAR
Context: Defnyddir yr acronym OSPAR yn y ddwy iaith.
Last Updated: 5 March 2015
English: osmium
Welsh: osmiwm
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
English: osmotic diuretic
Welsh: diwretig osmotig
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Plural: diwretigion osmotig
Last Updated: 6 November 2019
English: OSPAR
Welsh: 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
English: OSR
Welsh: Y Swyddfa Rheoleiddio Ystadegau
Status B
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Notes: Dyma'r acronym Saesneg a ddefnyddir am Office for Statistics Regulation.
Last Updated: 24 November 2025
English: OST
Welsh: Y Swyddfa dros Wyddoniaeth a Thechnoleg
Status C
Subject: Education
Part of speech: Noun, Feminine, Singular
Definition: Office of Science and Technology
Last Updated: 22 July 2010
English: osteopath
Welsh: 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
English: osteoporosis
Welsh: osteoporosis
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Last Updated: 7 March 2008
English: Oswestry
Welsh: Croesoswallt
Status A
Subject: Place-names
Part of speech: Proper noun
Definition: Lle yn Lloegr.
Context: Nid ’Syswallt.
Last Updated: 2 May 2013
English: OT
Welsh: Therapydd Galwedigaethol
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Context: Occupational Therapist
Last Updated: 1 September 2010
English: OTC
Welsh: dros y cownter
Status B
Subject: General
Part of speech: Adjective
Notes: Defnyddir yn aml yng nghyd-destun meddyginiaethau.
Last Updated: 2 April 2020