TermCymru

Results are displayed in Welsh alphabetical order A-Y
Welsh: Awdurdod y Marchnadoedd Nwy a Thrydan
English: Gas and Electricity Markets Authority
Status B
Subject: General
Part of speech: Noun, Masculine, Singular
Last updated: 3 July 2025
Welsh: boeler cyddwyso nwy
English: gas condensing boiler
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Last updated: 20 April 2012
Welsh: cartrefi nad ydynt ar y grid nwy
English: off gas-grid homes
Status C
Subject: Environment
Part of speech: Noun, Plural
Last updated: 25 March 2010
Welsh: cerbydau nwy naturiol
English: natural gas vehicles
Status C
Subject: Environment
Part of speech: Noun, Plural
Definition: NGV
Last updated: 3 December 2003
Welsh: chwilio am olew a nwy alltraeth ac elwa arnynt
English: offshore oil and gas exploration and exploitation
Status C
Subject: Law
Part of speech: Verb
Last updated: 7 June 2011
Welsh: Cofrestr Diogelwch Nwy
English: Gas Safe Register
Status C
Subject: Environment
Part of speech: Noun, Feminine, Singular
Context: Hwn yn disodli'r Gofrestr Nwy CORGI.
Last updated: 6 April 2011
Welsh: Corff Hyfforddi Cenedlaethol y Diwydiannau Nwy a Dŵr
English: Gas and Water Industry National Training Organisation
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: GWINTO
Last updated: 10 January 2003
Welsh: Corff Hyfforddi Cenedlaethol y Diwydiannau Nwy a Dŵr
English: GWINTO
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Gas and Water Industry National Training Organisation
Last updated: 21 July 2011
Welsh: cwcer nwy
English: gas cooker
Status B
Subject: Planning
Part of speech: Noun, Masculine, Singular
Plural: cwceri nwy
Definition: Cyfarpar coginio sy'n ymgorffori ffwrn, hob a gril ac sy'n defnyddio nwy fel ffynhonnell ynni.
Last updated: 27 January 2026
Welsh: cyflenwr nwy
English: gas supplier
Status C
Subject: Planning
Part of speech: Noun, Masculine, Singular
Plural: cyflenwyr nwy
Last updated: 30 June 2022
Welsh: cyflenwr nwy cyhoeddus
English: public gas supplier
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Last updated: 23 July 2003
Welsh: cyfleuster derbyn nwy
English: gas reception facility
Status A
Subject: Planning
Part of speech: Noun, Masculine, Singular
Plural: cyfleusterau derbyn nwy
Definition: Cyfleuster ar gyfer derbyn nwy naturiol yn ei ffurf nwy, ac ar gyfer ymdrin ag ef (heblaw ei storio).
Last updated: 23 February 2026
Welsh: cymysgedd nwy carbon deuocsid mewn dau gam
English: biphasic carbon dioxide gas mixture
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Last updated: 6 September 2011
Welsh: cysylltiadau nwy gweithredol
English: active gas connections
Status C
Subject: Health
Part of speech: Noun, Plural
Context: Parhau i fapio cysylltiadau nwy gweithredol yng Nghymru ac annog cwmnïau ynni i ymestyn y grid nwy lle y bo’n ymarferol, yn enwedig mewn ardaloedd â llawer iawn o dlodi tanwydd.
Last updated: 5 September 2019
Welsh: diwydiant nwy
English: gas industry
Status C
Subject: Economic development
Part of speech: Noun, Masculine, Singular
Last updated: 11 September 2007
Welsh: echdynnu olew a nwy
English: oil and gas extraction
Status C
Subject: Environment
Part of speech: Verb
Last updated: 12 September 2007
Welsh: eiddo nad yw ar y grid nwy
English: off-grid
Status B
Subject: Housing
Part of speech: Noun, Masculine, Singular
Notes: Ymadrodd llaw fer yw'r term Saesneg, i ddisgrifio eiddo (neu bobl sy'n berchen ar eiddo) nad yw wedi ei gysylltu â'r grid nwy cenedlaethol ac sydd felly yn dibynnu ar fathau eraill o danwydd, ee olew gwresogi, LPG neu systemau amgen fel pympiau gwres. Caiff yr ymadrodd Saesneg ei atodi'n ansoddeiriol at bob math o dermau eraill, ac weithiau bydd hyn yn golygu dehongli perthynas yr elfen 'off-grid' a'r elfen graidd, ee off-grid fuel > tanwydd ar gyfer eiddo nad yw ar y grid nwy. Gall hefyd ddisgrifio eiddo nad yw wedi ei gysylltu â’r grid trydan (ee yn achos rhai adeiladau fferm) neu gall ddisgrifio pobl sy’n dewis byw heb gysylltiad ag unrhyw gyfleustodau o gwbl. Yn yr achosion hyn gellir addasu’r term yn unol â’r ystyr.
Last updated: 1 June 2026
Welsh: ffrwd cymysgu olew nwy
English: gas oil blending stream
Status C
Subject: Environment
Part of speech: Noun, Feminine, Singular
Last updated: 1 September 2010
Welsh: Gorchymyn Trydan a Nwy (Rhwymedigaeth Cwmnïau Ynni) 2022
English: The Electricity and Gas (Energy Company Obligation) Order 2022
Status B
Subject: Titles of legislation
Part of speech: Noun, Masculine, Singular
Notes: Teitl cwrteisi ar enw darn o ddeddfwriaeth sydd ar gael yn Saesneg yn unig.
Last updated: 26 September 2024
Welsh: grid nwy
English: gas network
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Context: Parhau i fapio cysylltiadau nwy gweithredol yng Nghymru ac annog cwmnïau ynni i ymestyn y grid nwy lle y bo’n ymarferol, yn enwedig mewn ardaloedd â llawer iawn o dlodi tanwydd.
Last updated: 5 September 2019
Welsh: Gwasanaeth Argyfwng Nwy Cenedlaethol
English: National Gas Emergency Service
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Last updated: 6 April 2011
Welsh: Gweithfeydd Compostio a Bio-nwy
English: Composting and Biogas Plants
Status C
Subject: Environment
Part of speech: Noun, Plural
Last updated: 29 April 2003
Welsh: gweithrediadau olew a nwy ar y môr
English: offshore oil and gas operations
Status C
Subject: Environment
Part of speech: Noun, Plural
Last updated: 23 July 2003
Welsh: gweithrediadau olew a nwy ar y tir
English: onshore oil and gas operations
Status C
Subject: Environment
Part of speech: Noun, Plural
Last updated: 23 July 2003
Welsh: gwenwyno â nwy
English: gassing
Status C
Subject: Agriculture
Part of speech: Verb
Last updated: 15 February 2010
Welsh: gwresogi ag olew neu nwy
English: oil and gas heating
Status C
Subject: Environment
Part of speech: Verb
Last updated: 8 July 2008
Welsh: nwy anadweithiol
English: inert gas
Status A
Subject: Agriculture
Part of speech: Noun, Masculine, Singular
Last updated: 5 February 2013
Welsh: nwy anghonfensiynol
English: unconventional gas resource
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Context: Bydd nwy’n parhau i chwarae rôl wrth newid i system ynni carbon isel, ac o ystyried heriau sicrwydd ynni, mae angen gwerthuso potensial nwy anghonfensiynol yng Nghymru a’r cyfleoedd economaidd a allai ddeillio o unrhyw ddatblygiad.
Last updated: 5 September 2019
Welsh: nwy clustogi
English: cushion gas
Status A
Subject: Planning
Part of speech: Noun, Masculine, Singular
Definition: Nwy a gedwir mewn cyfleusterau tanddaearol at y diben o alluogi adfer o’r storfa nwy arall a storiwyd ynddi.
Last updated: 23 February 2026
Welsh: nwy naturiol
English: natural gas
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Unrhyw nwy sy'n deillio o strata naturiol.
Last updated: 23 February 2026
Welsh: Nwy Naturiol Hylifedig
English: Liquefied Natural Gas
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: LNG
Last updated: 24 May 2005
Welsh: nwy naturiol hylifedig
English: liquified natural gas
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Nwy naturiol sydd wedi cael ei oeri nes ei fod wedi troi'n hylif.
Notes: Mae'r termau liquid natural gas/nwy naturiol hylifol yn gyfystyr, a defnyddir yr acronym LNG ar gyfer y ddau derm, yn y ddwy iaith.
Last updated: 23 February 2026
Welsh: nwy naturiol hylifol
English: liquid natural gas
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Nwy naturiol sydd wedi cael ei oeri nes ei fod wedi troi'n hylif.
Notes: Mae'r termau liquified natural gas/nwy naturiol hylifedig yn gyfystyr, a defnyddir yr acronym LNG ar gyfer y ddau derm, yn y ddwy iaith.
Last updated: 23 February 2026
Welsh: nwy o’r prif gyflenwad
English: mains gas
Status B
Subject: Housing
Part of speech: Noun, Masculine, Singular
Last updated: 1 August 2018
Welsh: nwy petrolewm hylifedig
English: liquefied petroleum gas
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Last updated: 10 January 2007
Welsh: nwy potel diwydiannol
English: bottled industrial gas
Status C
Subject: Economic development
Part of speech: Noun, Masculine, Singular
Last updated: 25 July 2005
Welsh: nwy siâl
English: shale gas
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Last updated: 6 January 2014
Welsh: nwy tŷ gwydr
English: greenhouse gas
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Plural: nwyon tŷ gwydr
Context: Mae cyflenwi ynni, busnes a phrosesau diwydiannol yn parhau i fod yn brif sbardun allyriadau nwyon tŷ gwydr.
Last updated: 25 July 2019
Welsh: nwy tirlenwi
English: landfill gas
Status B
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Dull o gynhyrchu ynni adnewyddol.
Context: Ceir 28 o gynhyrchwyr carthion a nwy tirlenwi ar draws y wlad, gyda’r rhan fwyaf yn safleoedd tirlenwi (23 safle). Gyda’i gilydd, mae gan y technolegau hyn gyfanswm capasiti thermol a thrydanol cyfun o bron i 50 MW. Mae’r swm a gynhyrchir o nwy tirlenwi wedi bod yn gostwng yn raddol o’i uchafbwynt yn 2014, oherwydd bod llai o nwy methan yn cael ei ddal o wastraff sy’n dadelfennu.
Last updated: 16 September 2024
Welsh: nwy wedi ei fflworineiddio
English: fluorinated gas
Status B
Subject: Environment
Part of speech: Noun, Masculine, Singular
Plural: nwyon wedi eu fflworineiddio
Last updated: 16 November 2023
Welsh: nwy wedi ei fflworineiddio
English: F-gas
Status B
Subject: Environment
Part of speech: Noun, Masculine, Singular
Plural: nwyon wedi eu fflworineiddio
Definition: Nwy tŷ gwydr a wnaed gan ddyn, sy'n cynnwys fflworin.
Last updated: 16 November 2023
Welsh: olew nwy
English: gas oil
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Olew sy’n cael ei ffurfio trwy ddistyllu petrolewm trwy dwymo’r olew, ei droi’n nwy ac yna ei gyddwyso.
Last updated: 1 September 2010
Welsh: Plymio a Gwresogi Domestig (Cyfarpar Aer Cynnes sy'n Rhedeg ar Nwy)
English: Domestic Plumbing & Heating (Gas Fired Warm Air Appliances)
Status A
Subject: Education
Part of speech: Proper noun
Context: Apprenticeship framework.
Last updated: 23 July 2013
Welsh: Plymio a Gwresogi Domestig (Cyfarpar Gwresogi Dŵr a Gwres Canolog sy'n Rhedeg ar Nwy)
English: Domestic Plumbing & Heating (Gas Fired Water and Central Heating Appliances)
Status A
Subject: Education
Part of speech: Proper noun
Context: Apprenticeship framework.
Last updated: 5 August 2013
Welsh: Prosiect Tyrbinau Nwy Cylch Cyfun Pŵer Hafren
English: Severn Power CCGT Project
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: CCGT = Combined Cycle Gas Turbines
Last updated: 20 October 2008
Welsh: Rheoliadau Diogelwch Nwy (Gosod a Defnyddio) 1998
English: Gas Safety (Installation and Use) Regulations 1998
Status B
Subject: Titles of legislation
Part of speech: Noun, Plural
Notes: Teitl cwrteisi ar ddarn o ddeddfwriaeth sydd ar gael yn Saesneg yn unig.
Last updated: 2 December 2021
Welsh: Rheoliadau Gwaith Piblinellau Trawsgludo Nwy Cyhoeddus (Asesu Effeithiau Amgylcheddol) 1999
English: Public Gas Transporter Pipe-line Works (Environmental Impact Assessment) Regulations 1999
Status A
Subject: Titles of legislation
Part of speech: Noun, Plural
Last updated: 12 September 2012
Welsh: rhwydwaith trosglwyddo nwy pwysedd uchel
English: high-pressure gas transmission network
Status C
Subject: Economic development
Part of speech: Noun, Masculine, Singular
Last updated: 18 August 2014
Welsh: stynio â nwy
English: gas stunning
Status A
Subject: Agriculture
Part of speech: Verb
Last updated: 5 February 2013
Welsh: tanwydd ar gyfer eiddo nad yw ar y grid nwy
English: off-grid fuel
Status B
Subject: Housing
Part of speech: Noun, Masculine, Singular
Plural: tanwyddau ar gyfer eiddo nad yw ar y grid nwy
Notes: Gweler y cofnod am off grid / eiddo nad yw ar y grid nwy.
Last updated: 18 March 2026