TermCymru

Results are displayed in Welsh alphabetical order A-Y
Welsh: is-gytras
English: sub-clade
Status B
Subject: Environment
Part of speech: Noun, Masculine, Singular
Plural: is-gytrasau
Last updated: 24 September 2024
Welsh: is-haenau cymysg
English: mixed substrata
Status C
Subject: Environment
Part of speech: Noun, Plural
Definition: EU Habitats Directive Annex 1 Habitat
Last updated: 14 February 2014
Welsh: is-haenau meddal â thyllau pidocau
English: soft piddock-bored substrata
Status C
Subject: Environment
Part of speech: Noun, Plural
Definition: EU Habitats Directive Annex 1 Habitat
Last updated: 20 February 2014
Welsh: is-iarll
English: viscount
Status C
Subject: General
Part of speech: Noun, Masculine, Singular
Last updated: 29 November 2005
Welsh: is-is-gontractio
English: sub-subcontract
Status B
Subject: Law
Part of speech: Verb
Last updated: 18 November 2025
Welsh: is-is-gontractwr
English: sub-subcontractor
Status B
Subject: Law
Part of speech: Noun, Masculine, Singular
Plural: is-is-gontractwyr
Definition: Endid neu gwmni sy’n cael ei gontractio gan is-gontractwr i gyflawni agwedd (arbenigol, gan amlaf) ar waith sydd wedi’i is-gontractio i’r is-gontractwr. Nid yw trefniadau o’r fath yn anarferol yn y diwydiant adeiladu.
Last updated: 18 November 2025
Welsh: Islam
English: Islam
Status A
Subject: Religion
Part of speech: Noun, Feminine, Singular
Last updated: 15 March 2006
Welsh: Islam
English: Islam
Status B
Subject: Religion
Part of speech: Noun, Masculine, Singular
Last updated: 19 April 2023
Welsh: Islamaidd
English: Islamic
Status B
Subject: Religion
Part of speech: Adjective
Definition: Yn ymwneud â chrefydd Islam.
Notes: Sylwer na ddylid drysu'r termau Cymraeg a Saesneg hyn â'r termau Islamist/Islamyddol, sy'n ymwneud â ffwndamentaliaeth Islamaidd.
Last updated: 19 April 2023
Welsh: Islamoffobia
English: Islamophobia
Status B
Subject: Justice and order
Part of speech: Noun, Masculine, Singular
Last updated: 15 May 2019
Welsh: Islamydd
English: Islamist
Status B
Subject: Religion
Part of speech: Noun, Masculine, Singular
Definition: Ffwndamentalydd Islamaidd, neu un sydd o blaid cynyddu dylanwad y gyfraith Islamaidd ym meysydd y gyfraith a chymdeithas.
Last updated: 19 April 2023
Welsh: Islamyddiaeth
English: Islamism
Status B
Subject: Religion
Part of speech: Noun, Feminine, Singular
Definition: Ffwndamentaliaeth Islamaidd, neu gred y dylid cynyddu dylanwad y gyfraith Islamaidd ym meysydd y gyfraith a chymdeithas.
Last updated: 19 April 2023
Welsh: Islamyddol
English: Islamist
Status B
Subject: Religion
Part of speech: Adjective
Definition: Yn ymwneud â ffwndamentaliaeth Islamaidd neu'r gred y dylid cynyddu dylanwad y gyfraith Islamaidd ym meysydd y gyfraith a chymdeithas.
Notes: Sylwer na ddylid drysu'r termau Cymraeg a Saesneg hyn â'r termau Islamic/Islamaidd, sy'n ymwneud â'r grefydd ei hun.
Last updated: 19 April 2023
Welsh: is-Landlord Cymdeithasol Cofrestredig
English: subsidiary Registered Social Landlord
Status B
Subject: Housing
Part of speech: Noun, Masculine, Singular
Last updated: 13 January 2012
Welsh: islanwol
English: sub-tidal
Status C
Subject: Environment
Part of speech: Adjective
Last updated: 20 April 2012
Welsh: islawr
English: basement
Status C
Subject: Housing
Part of speech: Noun, Masculine, Singular
Definition: in CP1
Last updated: 14 June 2004
Welsh: is-les
English: underlease
Status A
Subject: Housing
Part of speech: Noun, Feminine, Singular
Plural: is-lesoedd
Definition: Les a gymer effaith o dan les arall.
Notes: Mae'r term hwn yn gyfystyr â 'sub-lease'.
Last updated: 1 September 2022
Welsh: is-les
English: sub-lease
Status A
Subject: Law
Part of speech: Noun, Feminine, Singular
Plural: is-lesoedd
Definition: Les a gymer effaith o dan les arall.
Notes: Mae'r term hwn yn gyfystyr ag 'underlease'.
Last updated: 1 September 2022
Welsh: Islwyn
English: Islwyn
Status A
Subject: Politics
Part of speech: Proper noun
Definition: Constituency
Last updated: 25 June 2002
Welsh: Is-lywydd
English: Vice-President
Status C
Subject: Personnel
Part of speech: Noun, Masculine, Singular
Context: Of a society or association.
Last updated: 10 January 2003
Welsh: Is-Lywydd Llyfrgell Genedlaethol Cymru
English: Vice President of the National Library of Wales
Status C
Subject: Personnel
Part of speech: Noun, Masculine, Singular
Last updated: 12 September 2008
Welsh: Is-lywydd y Llys Gwarchod
English: Vice President of the Court of Protection
Status B
Subject: Justice and order
Part of speech: Noun, Masculine, Singular
Last updated: 12 August 2021
Welsh: ISMI
English: ISMI
Status C
Subject: Social services
Definition: Income Support for Mortgage Interest
Last updated: 10 January 2003
Welsh: is-offeryn Cymreig
English: Welsh subordinate instruments
Status C
Subject: Law
Part of speech: Noun, Masculine, Singular
Plural: is-offerynnau Cymreig
Context: In the Bill, both of these kinds of subordinate legislation are referred to as ‘Welsh subordinate instruments’{7}.
Last updated: 31 January 2018
Welsh: is-offeryn Cymreig
English: Welsh subordinate instrument
Status A
Subject: Law
Part of speech: Noun, Masculine, Singular
Plural: is-offerynnau Cymreig
Definition: Offeryn nad yw ond yn cynnwys un neu ddau o’r canlynol: (a) is-ddeddfwriaeth a wneir o dan Ddeddf Cynulliad neu Fesur Cynulliad; (b) is-ddeddfwriaeth (i) a wneir o dan Ddeddf gan Senedd y Deyrnas Unedig neu ddeddfwriaeth uniongyrchol UE a ddargedwir, (ii) nas gwneir ond gan Weinidogion Cymru neu unrhyw awdurdod Cymreig datganoledig arall, a (iii) nad yw ond yn gymwys o ran Cymru.
Notes: Daw'r diffiniad o Ddeddf Deddfwriaeth (Cymru) 2019.
Last updated: 25 November 2024
Welsh: isoprotwron
English: isoproturon
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Last updated: 1 November 2010
Welsh: is-orsaf ar y tir
English: onshore substation
Status C
Subject: Environment
Part of speech: Noun, Feminine, Singular
Last updated: 8 December 2004
Welsh: isosod
English: sub-let
Status B
Subject: Housing
Part of speech: Verb
Last updated: 24 May 2012
Welsh: isotop
English: isotope
Status B
Subject: Environment
Part of speech: Noun, Masculine, Singular
Plural: isotopau
Last updated: 23 March 2021
Welsh: ISP
English: ISP
Status C
Subject: Economic development
Part of speech: Noun, Feminine, Singular
Definition: Investment Support Programme
Last updated: 10 January 2003
Welsh: ISP
English: ISP
Status B
Subject: ICT
Part of speech: Neutral
Definition: Internet Service Provider
Last updated: 2 September 2004
Welsh: israddio
English: de-trunk
Status A
Subject: Transport
Part of speech: Verb
Definition: A trunk road is a road maintained by the National Assembly. All other roads are maintained by local authorities.
Last updated: 19 August 2003
Welsh: Israel
English: Israel
Status A
Subject: Place-names
Part of speech: Proper noun
Notes: Safonwyd yr enw hwn gan ddilyn yr egwyddorion a nodir yn yr erthygl 'Dynodi enwau gwladwriaethau, tiriogaethau a chenhedloedd diwladwriaeth' yn yr Arddulliadur.
Last updated: 17 August 2021
Welsh: Is-raglaw Noord Holland
English: Vice Governor of Noord Holland
Status C
Subject: Politics
Part of speech: Noun, Masculine, Singular
Last updated: 25 October 2017
Welsh: is-ranbarth
English: sub-region
Status C
Subject: Economic development
Part of speech: Noun, Masculine, Singular
Last updated: 23 December 2005
Welsh: is-ranbarthol
English: sub-regional
Status C
Subject: Economic development
Part of speech: Adjective
Last updated: 23 December 2005
Welsh: Is-raniad Ardaloedd Adeiledig
English: Built Up Area Sub-division
Status C
Subject: Planning
Part of speech: Noun, Masculine, Singular
Definition: BUASD
Last updated: 7 August 2014
Welsh: Is-raniad Ardaloedd Adeiledig
English: BUASD
Status C
Subject: Planning
Part of speech: Noun, Masculine, Singular
Definition: Built Up Area Sub-division
Last updated: 7 August 2014
Welsh: is-reolwaith
English: sub-routine
Status B
Subject: ICT
Part of speech: Noun, Masculine, Singular
Last updated: 19 July 2005
Welsh: is-reolwaith llyfrgell
English: library sub-routine
Status B
Subject: ICT
Part of speech: Noun, Masculine, Singular
Last updated: 19 July 2005
Welsh: Is-reolwr dan Hyfforddiant
English: Trainee Assistant Manager
Status B
Subject: Personnel
Part of speech: Noun, Masculine, Singular
Last updated: 4 October 2016
Welsh: is-reolwyr
English: first line management
Status B
Subject: Personnel
Part of speech: Noun, Plural
Definition: Yng nghyd-destun hierarchiaeth y Gwasanaeth Sifil.
Last updated: 21 January 2003
Welsh: is-retinol
English: subretinal
Status B
Subject: Health
Part of speech: Adjective
Last updated: 8 June 2016
Welsh: is-risgl
English: underbark
Status C
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: The inner layer of tree bark, beneath the overbark.
Last updated: 15 September 2016
Welsh: isrywogaeth
English: sub-species
Status C
Subject: Law
Part of speech: Noun, Plural
Last updated: 7 September 2004
Welsh: isrywogaethau
English: sub-species
Status C
Subject: Law
Part of speech: Noun, Feminine, Singular
Last updated: 7 September 2004
Welsh: is-sampl
English: sub-sample
Status B
Subject: Finance and statistics
Part of speech: Noun, Masculine, Singular
Plural: is-samplau
Notes: Yng nghyd-destun arolygon barn.
Last updated: 22 December 2022
Welsh: is-sector cerbydau gwasanaeth cyhoeddus
English: sub sector of public service vehicles
Status C
Subject: Transport
Part of speech: Noun, Masculine, Singular
Context: Termau o’r Memorandwm Esboniadol ar gyfer y Mesur Arfaethedig ynghylch Diogelwch ar Gludiant i Ddysgwyr (Cymru).
Last updated: 8 December 2010
Welsh: is-sector y bysiau penodedig sy’n darparu cludiant i’r ysgol
English: dedicated school transport bus sub-sector
Status C
Subject: Transport
Part of speech: Noun, Masculine, Singular
Context: Termau o’r Memorandwm Esboniadol ar gyfer y Mesur Arfaethedig ynghylch Diogelwch ar Gludiant i Ddysgwyr (Cymru).
Last updated: 8 December 2010
Welsh: is-sefydliad
English: secondary establishment
Status C
Subject: Education
Part of speech: Noun, Masculine, Singular
Last updated: 27 March 2008