TermCymru

Results are displayed in Welsh alphabetical order A-Y

English: indicator species

Status C

Subject: Agriculture

Part of speech: Noun, Feminine, Singular

Definition: A species whose presence indicates the presence of a set of other species and whose absence indicates the lack of that entire set of species.

Last updated: 20 April 2011

Welsh: rhywogaeth eilaidd

English: secondary species

Status B

Subject: Agriculture

Part of speech: Noun, Feminine, Singular

Last updated: 10 July 2012

Welsh: rhywogaeth estron

English: non-indigenous species

Status A

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau estron

Context: Rhywogaethau sydd y tu allan i’w tiriogaeth naturiol yw rhywogaethau estron.

Last updated: 6 June 2019

Welsh: rhywogaeth estron

English: non-native species

Status B

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau estron

Definition: Anifail neu blanhigyn a gyflwynir yn fwriadol neu’n anfwriadol i amgylchedd naturiol lle nad yw fel arfer i’w gael.

Notes: Mae’r term Saesneg alien species yn gyfystyr.

Last updated: 16 September 2024

Welsh: rhywogaeth estron

English: alien species

Status B

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau estron

Definition: Anifail neu blanhigyn a gyflwynir yn fwriadol neu’n anfwriadol i amgylchedd naturiol lle nad yw fel arfer i’w gael.

Notes: Mae’r term Saesneg non-native species yn gyfystyr.

Last updated: 18 September 2024

Welsh: rhywogaeth estron oresgynnol

English: invasive alien species

Status B

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau estron goresgynnol

Definition: Anifail neu blanhigyn a gyflwynir yn fwriadol neu’n anfwriadol i amgylchedd naturiol lle nad yw fel arfer i’w gael, gyda goblygiadau andwyol difrifol i’w amgylchedd newydd. Gall hefyd achosi niwed economaidd a niwed i iechyd pobl.

Notes: Mae’r term Saesneg invasive non-native species yn gyfystyr.

Last updated: 16 September 2024

Welsh: rhywogaeth estron oresgynnol

English: invasive non-native species

Status B

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau estron goresgynnol

Notes: Mae’r term Saesneg invasive alien species yn gyfystyr.

Last updated: 18 September 2024

Welsh: Rhywogaeth Forol a Warchodir gan Ewrop

English: European Marine Protected Species

Status B

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: Rhywogaethau Morol a Warchodir gan Ewrop

Definition: Rhywogaeth forol – o forfilod, dolffiniaid neu lamhidyddion - a warchodir drwy ddeddfwriaeth Ewropeaidd (y Gyfarwyddeb Cynefinoedd), a weithredir yng Nghymru gan Reoliadau Gwarchod Cynefinoedd a Rhywogaethau 2010.

Last updated: 16 September 2015

Welsh: rhywogaeth frodorol

English: native species

Status A

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau brodorol

Last updated: 22 April 2025

Welsh: rhywogaeth fudol

English: mobile species

Status C

Subject: Environment

Part of speech: Noun, Feminine, Singular

Context: Also known as “migratory species”.

Last updated: 25 November 2014

Welsh: rhywogaeth fudol

English: migratory species

Status A

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau mudol

Last updated: 22 April 2025

Welsh: rhywogaeth fudol sy'n bresennol yn rheolaidd

English: regularly occurring migratory species

Status A

Subject: Environment

Part of speech: Noun, Plural

Plural: rhywogaethau mudol sy'n bresennol yn rheolaidd

Last updated: 22 April 2025

Welsh: rhywogaeth gonfensiynol

English: conventional species

Status B

Subject: Agriculture

Part of speech: Noun, Feminine, Singular

Last updated: 30 July 2003

Welsh: rhywogaeth hadog

English: seed rich species

Status C

Subject: Agriculture

Part of speech: Noun, Feminine, Singular

Last updated: 24 February 2005

Welsh: rhywogaeth model esblygol K

English: K-selected species

Status B

Subject: Environment

Part of speech: Noun, Feminine, Singular

Definition: K-selection is a type of selection that favours organisms with a low rate of reproduction but whose populations expand to the maximum number of individuals that the habitat can support (the carrying capacity of the habitat). K-selected species (or K strategists) tend to be highly adapted to their environment and are able to compete successfully for food and other resources.

Last updated: 9 March 2017

Welsh: rhywogaeth o dan reolaeth

English: controlled species

Status C

Subject: Agriculture

Part of speech: Noun, Masculine, Singular

Last updated: 14 November 2007

Welsh: Rhywogaeth o Ddiddordeb i'r Gymuned

English: Species of Community Interest

Status C

Subject: Agriculture

Part of speech: Noun, Feminine, Singular

Definition: Neu i’r Undeb Ewropeaidd. Jargon Ewropeaidd am yr anifeiliaid a’r planhigion sy’n cael eu henwi yn Atodiadau amrywiol y Gyfarwyddeb Cynefinoedd.

Last updated: 31 March 2009

Welsh: rhywogaeth oresgynnol

English: invasive species

Status B

Subject: Agriculture

Part of speech: Noun, Feminine, Singular

Definition: A species occurring as a result of human activities beyond its accepted normal distribution and which threatens valued environmental, agricultural or personal resources by the damage it causes.

Last updated: 22 September 2004

Welsh: rhywogaeth oresgynnol ddyfrol

English: invasive aquatic species

Status C

Subject: Environment

Part of speech: Noun, Feminine, Singular

Last updated: 13 November 2014

Welsh: rhywogaeth restredig

English: prescribed species

Status C

Subject: Agriculture

Part of speech: Noun, Feminine, Singular

Last updated: 4 August 2010

Welsh: rhywogaeth sy'n bridio

English: breeding species

Status A

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau sy'n bridio

Last updated: 22 April 2025

Welsh: rhywogaeth sy'n cael ei gwarchod yn genedlaethol

English: nationally protected species

Status C

Subject: Environment

Part of speech: Noun, Feminine, Singular

Definition: Rhywogaeth sydd ar restr y wlad o rywogaethau sydd i gael eu gwarchod.

Last updated: 7 November 2011

Welsh: rhyw yr anws

English: anal sex

Status B

Subject: Health

Part of speech: Noun, Masculine, Singular

Definition: Hefyd "rhyw rhefrol".

Last updated: 16 August 2004

Welsh: riboteip

English: ribotype

Status C

Subject: Health

Part of speech: Noun, Masculine, Singular

Last updated: 12 September 2008

Welsh: RICE

English: RICE

Status C

Subject: Social services

Definition: Registration, Inspection, Complaints/Compliance and Enforcement (CSIW)

Last updated: 28 April 2004

Welsh: riff

English: reef

Status C

Subject: Environment

Part of speech: Noun, Masculine, Singular

Definition: EU Habitats Directive Annex 1 Habitat

Last updated: 14 February 2014

Welsh: riff

English: reef

Status A

Subject: Environment

Part of speech: Noun, Masculine, Singular

Plural: riffau

Last updated: 28 February 2019

Welsh: riffarocsaban

English: rifarocsaban

Status B

Subject: Health

Part of speech: Noun, Masculine, Singular

Last updated: 22 October 2024

Welsh: riff biogenig dan ddylanwad tywod

English: sand-influenced biogenic reef

Status C

Subject: Environment

Part of speech: Noun, Masculine, Singular

Definition: EU Habitats Directive Annex 1 Habitat

Last updated: 14 February 2014

Welsh: riff biogenig isforlannol ar waddod

English: sublittoral biogenic reef on sediment

Status A

Subject: Environment

Part of speech: Noun, Masculine, Singular

Definition: Sediment habitats in the sublittoral near shore zone (i.e. covering the infralittoral and circalittoral zones), typically extending from the extreme lower shore down to the edge of the bathyal zone (200m). Sublittoral biogenic reef communities. This complex includes polychaete reefs, bivalve reefs (e.g. mussel beds) and cold water coral reefs.

Notes: Term o system ddosbarthu EUNIS o gynefinoedd morol. SS.SBR. yw’r Cod Cynefin. Mae’r Cyd-bwyllgor Cadwraeth Natur yn defnyddio system arall o gategoreiddio cynefinoedd morol, yn seiliedig ar system ddosbarthu EUNIS. Yn y drefn honno “subtidal biogenic reef” yw’r term cyfatebol.

Last updated: 12 October 2016

Welsh: riff biogenig islanw

English: subtidal biogenic reef

Status A

Subject: Environment

Part of speech: Noun, Masculine, Singular

Notes: Dyma derm y Cyd-bwyllgor Cadwraeth Natur ar gyfer y biotop hwn, sy’n seiliedig ar system ddosbarthu EUNIS o gynefinoedd morol. Yn system ddosbarthu EUNIS, “sublittoral biogenic reef on sediment” yw’r term cyfatebol. Gweler y cofnod am y term hwnnw am fwy o wybodaeth, gan gynnwys diffiniad.

Last updated: 12 October 2016

Welsh: riff biogenig morlannol

English: littoral biogenic reef

Status A

Subject: Environment

Part of speech: Noun, Masculine, Singular

Definition: Littoral sediment includes habitats of shingle (mobile cobbles and pebbles), gravel, sand and mud or any combination of these which occur in the intertidal zone. The Littoral Biogenic Reef habitat complex contains two biotope complexes (littoral Sabellaria reefs, and mixed sediment shores with mussels), encompassing the littoral biotope dominated by the honeycomb worm Sabellaria alveolata, and littoral Mytilus edulis- dominated communities.

Notes: Term o system ddosbarthu EUNIS o gynefinoedd morol. LS.LBR. yw’r Cod Cynefin. Mae’r Cyd-bwyllgor Cadwraeth Natur yn defnyddio system arall o gategoreiddio cynefinoedd morol, yn seiliedig ar system ddosbarthu EUNIS. Yn y drefn honno “intertidal biogenic reef” yw’r term cyfatebol.

Last updated: 12 October 2016

Welsh: riff biogenig rhynglanw

English: intertidal biogenic reef

Status A

Subject: Environment

Part of speech: Noun, Masculine, Singular

Notes: Dyma derm y Cyd-bwyllgor Cadwraeth Natur ar gyfer y biotop hwn, sy’n seiliedig ar system ddosbarthu EUNIS o gynefinoedd morol. Yn system ddosbarthu EUNIS, “littoral biogenic reef” yw’r term cyfatebol. Gweler y cofnod am y term hwnnw am fwy o wybodaeth, gan gynnwys diffiniad.

Last updated: 12 October 2016

Welsh: riff clogfeini a choblau islanw

English: subtidal boulder and cobble reef

Status B

Subject: Environment

Part of speech: Noun, Masculine, Singular

Plural: riffau clogfeini a choblau islanw

Notes: Math ar gynefin morol.

Last updated: 22 September 2022

Welsh: riff creigwelyau islanw

English: subtidal bedrock reef

Status B

Subject: Environment

Part of speech: Noun, Masculine, Singular

Plural: riffau creigwelyau islanw

Notes: Math ar gynefin morol.

Last updated: 22 September 2022

Welsh: riff llanw

English: tidal reef

Status A

Subject: Environment

Part of speech: Noun, Masculine, Singular

Definition: Yn ymwneud â phrosiect ynni'r llanw aber afon Hafren.

Last updated: 31 December 2008

Welsh: riff rhynglanw y mwydyn crwybr

English: intertidal honeycomb worm reef

Status B

Subject: Environment

Part of speech: Noun, Masculine, Singular

Plural: riffiau rhynglanw y mwydyn crwybr

Last updated: 23 March 2021

Welsh: riff Sabellaria alevolata

English: Sabellaria alevolata reef

Status B

Subject: Environment

Part of speech: Noun, Masculine, Singular

Plural: riffau Sabellaria alevolata

Notes: Math ar gynefin morol.

Last updated: 22 September 2022

Welsh: riff Sabellaria spinulosa

English: Sabellaria spinulosa reefs

Status B

Subject: Environment

Part of speech: Noun, Masculine, Singular

Plural: riffau Sabellaria spinulosa

Notes: Math ar gynefin morol.

Last updated: 22 September 2022

Welsh: riff swigod

English: bubbling reef

Status B

Subject: Environment

Part of speech: Noun, Masculine, Singular

Plural: riffiau swigod

Definition: Strwythur tanfor sy’n ffurfio ger agorfeydd nwyon ar wely’r môr.

Last updated: 14 January 2021

Welsh: rifolfer

English: revolver

Status B

Subject: Justice and order

Part of speech: Noun, Masculine, Singular

Last updated: 1 August 2012

Welsh: RIG

English: RIG

Status C

Subject: Education

Part of speech: Noun, Masculine, Singular

Definition: Rewards and Incentives Group

Last updated: 17 January 2005

Welsh: Rig Ffrwydro Stem

English: Steam Explosion Rig

Status C

Subject: Environment

Part of speech: Noun, Masculine, Singular

Definition: The Steam Explosion Pilot Facility uses steam to rapidly heat biomass up to a high pressure and temperature. Under high pressure the superheated steam penetrates the fibers as a liquid. The reactor is then rapidly decompressed into a flash tank, resulting in the hot liquid water reverting to steam. It is this rapid expansion that explodes the fiber in to small particles, which then enables better access for enzymes to release fermentable sugars from the plant fiber.

Last updated: 24 May 2013

Welsh: Right-Sizing Community Services to Support Discharge from Hospital

English: Right-Sizing Community Services to Support Discharge from Hospital

Status B

Subject: Health

Part of speech: Proper noun

Notes: Dogfen gan y GIG, sydd ar gael yn Saesneg yn unig.

Last updated: 25 June 2020

Welsh: RIGS

English: RIGS

Status C

Subject: Environment

Definition: Regionally Important Geological and Geomorphological Sites

Last updated: 10 January 2003

Welsh: Ringland

English: Ringland

Status A

Subject: Place-names

Part of speech: Proper noun

Definition: Casnewydd

Last updated: 14 August 2003

Welsh: Ringland

English: Ringland

Status A

Subject: Place-names

Part of speech: Proper noun

Notes: Ward etholiadol yn Ninas a Bwrdeistref Sirol Casnewydd. Dyma'r enwau a ragnodwyd yn Gymraeg a Saesneg ar gyfer y ward yng Ngorchymyn Dinas a Bwrdeistref Sirol Casnewydd (Trefniadau Etholiadol) 2021.

Last updated: 17 August 2022

Welsh: Riportiwch Gasineb - Cymru Ddiogelach

English: Report Hate - Safer Wales

Status A

Subject: Justice and order

Part of speech: Proper noun

Definition: The Welsh Assembly Government is working in partnership with Safer Wales, an independent charity working to combat hate crime and the Welsh police forces to tackle the under reporting of hate crimes in Wales.

Last updated: 8 February 2013

Welsh: RISE

English: RISE

Status C

Subject: Education

Definition: RISE is a partnership of all those involved in Lifelong Learning and the provision of learning in the five counties of Blaenau Gwent, Monmouthshire, Torfaen, Caerphilly and Newport.

Last updated: 6 April 2006

Welsh: risg

English: risk

Status A

Subject: General

Part of speech: Noun, Feminine, Singular

Plural: risgiau

Definition: Y posibilrwydd neu'r tebygolrwydd y bydd rhywbeth niweidiol yn digwydd ac, mewn rhai cyd-destunau, effaith y digwyddiad.

Notes: Mae'r diffiniad technegol o risg yn amrywio o faes i faes, ac mae gwahanol ystyriaethau'n berthnasol wrth asesu a rheoli risgiau mewn gwahanol feysydd. Cymharer â’r cofnod am hazard / perygl. Mewn rhai cyd-destunau llai technegol - dim ond pan fo 'risk' yn cael ei ddefnyddio mewn ffordd sy'n gyfystyr â 'danger' - mae’n bosibl y bydd yn fwy arferol defnyddio ‘perygl’ i drosi ‘risk’ (a ‘mewn perygl’ i drosi ‘at risk’). Fodd bynnag, 'risg' yw'r trosiad arferol o 'risk'.

Last updated: 4 June 2025

TermCymru

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