TermCymru

Results are displayed in Welsh alphabetical order A-Y

Welsh: rhywogaeth

English: species

Status A

Subject: Agriculture

Part of speech: Noun, Feminine, Singular

Last updated: 29 July 2003

Welsh: rhywogaeth allweddol

English: keystone species

Status C

Subject: Agriculture

Part of speech: Noun, Feminine, Singular

Definition: A species whose addition to or loss from an ecosystem leads to major changes in abundance or occurrence of at least one other species.

Last updated: 20 April 2011

Welsh: rhywogaeth annymunol

English: undesirable species

Status B

Subject: Agriculture

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau annymunol

Last updated: 23 September 2020

Welsh: rhywogaeth a nodir

English: notable species

Status B

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau a nodir

Definition: Rhywogaeth sydd â dynodiad cadwraeth, ond nad oes ganddi amddiffyniad cyfreithiol.

Last updated: 23 March 2021

Welsh: rhywogaeth atal

English: choke species

Status A

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau atal

Definition: Rhywogaethau sydd â chwota ar lefel isel iawn. Pe byddid yn cyrraedd trothwy'r cwota hwnnw byddai rhaid i'r cwch pysgota aros yn yr harbwr hyd yn oed os oedd ganddo gwota ar ôl ar gyfer rhywogaethau eraill.

Last updated: 28 February 2019

Welsh: rhywogaethau

English: species

Status C

Subject: Law

Part of speech: Noun, Plural

Last updated: 7 September 2004

Welsh: rhywogaethau amffipod

English: amphipod species

Status A

Subject: Environment

Part of speech: Noun, Plural

Definition: rhywogaethau sydd â dwy droed

Last updated: 7 October 2002

Welsh: rhywogaethau eogiaid

English: salmonids

Status C

Subject: Agriculture

Part of speech: Noun, Plural

Last updated: 29 July 2004

Welsh: rhywogaethau estron goresgynnol

English: invasive non-native species

Status A

Subject: Environment

Part of speech: Noun, Plural

Last updated: 20 May 2014

Welsh: rhywogaethau sy'n rhannu'r un cynefin

English: coincident species

Status A

Subject: Environment

Part of speech: Noun, Plural

Last updated: 6 June 2019

Welsh: rhywogaethau sy'n ymledu

English: invading species

Status C

Subject: Environment

Part of speech: Noun, Plural

Last updated: 25 June 2007

Welsh: rhywogaeth a warchodir

English: protected species

Status C

Subject: Environment

Part of speech: Noun, Feminine, Singular

Definition: plant and animal species, including all wild birds, protected under the Conservation (Natural Habitats and Conservation) Regulations 1994, the Wildlife and Countryside Act 1981 and subsequent amendments, or other species protected under legislation specific to them

Last updated: 10 January 2003

Welsh: Rhywogaeth a Warchodir gan Ewrop

English: European Protected Species

Status A

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: Rhywogaethau a Warchodir gan Ewrop

Context: ylai cynigion ddangos sut maent yn cydymffurfio â deddfwriaeth sy’n gwarchod Rhywogaethau a Warchodir gan Ewrop gan ei fod yn drosedd anafu, lladd neu aflonyddu ar rywogaeth a warchodir yn fwriadol.

Last updated: 6 June 2019

Welsh: Rhywogaeth a Warchodir gan y DU

English: UK Protected Species

Status B

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: Rhywogaethau a Warchodir gan y DU

Definition: Rhywogaeth a warchodir o dan ddeddfwriaeth ddomestig y DU yn unig yn hytrach na chyfarwyddeb Ewropeaidd.

Last updated: 16 September 2015

Welsh: Rhywogaeth â Blaenoriaeth

English: Priority Species

Status C

Subject: Agriculture

Part of speech: Noun, Feminine, Singular

Last updated: 3 October 2003

Welsh: rhywogaeth brae

English: forage species

Status B

Subject: Agriculture

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau prae

Definition: Rhywogaeth fach yng nghanol y gadwyn fwyd forol, sy'n bwydo ar blancton ac sy'n ysglyfaeth i greaduriaid mwy.

Last updated: 2 December 2021

Welsh: Rhywogaeth Bwysig Iawn i Fioamrywiaeth Cymru

English: Principal Biodiversity Species in Wales

Status C

Subject: Environment

Part of speech: Noun, Masculine, Singular

Definition: Rhestr o rywogaethau sy’n cael eu defnyddio fel mesur o gyflwr bioamrywiaeth Cymru.

Last updated: 13 February 2012

Welsh: rhywogaeth bysgod sy'n arbenigo mewn clywed

English: hearing-specialist fish species

Status B

Subject: Environment

Part of speech: Noun, Feminine, Singular

Plural: rhywogaethau pysgod sy'n arbenigo mewn clywed

Last updated: 23 March 2021

Welsh: rhywogaeth ddangosol

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 non-native 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 alien 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

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

Last updated: 16 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

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