TermCymru

Results are displayed in alphabetical order.
English: dd/mm/yyyy
Welsh: dd/mm/bbbb
Status C
Subject: Personnel
Last Updated: 28 November 2007
English: DDO
Welsh: Gorchymyn Didynnu Uniongyrchol
Status B
Subject: Law
Part of speech: Noun, Masculine, Singular
Plural: Gorchmynion Didynnu Uniongyrchol
Notes: Dyma’r acronym Saesneg a ddefnyddir am Direct Deduction Order.
Last Updated: 6 February 2025
English: DDoS attack
Welsh: ymosodiad Atal Gwasanaeth Gwasgaredig
Status B
Subject: ICT
Part of speech: Noun, Masculine, Singular
Plural: ymosodiadau atal gwasanaeth gwasgaredig
Definition: Math o ymosodiad seiber lle caiff gwasanaeth ar-lein ei orlwytho gan nifer fawr o geisiadau ar yr un pryd, gan ei gwneud yn amhosibl i ddefnyddwyr cyfreithlon gael mynediad.
Notes: Dyma’r ffurf fer ar y term Saesneg ‘Distributed Denial of Service attack’.
Last Updated: 13 November 2025
English: DDP
Welsh: Danfonwyd â'r Tollau wedi eu Talu
Status A
Subject: Finance and statistics
Part of speech: Adjective
Definition: Categori a ddefnyddir pan fydd gwerthwr sy'n allforio yn cyflawni ei gyfrifoldebau pan fydd nwyddau wedi eu gosod mewn man penodol a'u clirio ar gyfer eu mewnforio. Y gwerthwr sy'n ysgwyddo holl gostau a risgiau cludo'r nwyddau i'r man a enwyd, a'u clirio nid yn unig ar gyfer allforio ond ar gyfer eu mewnforio hefyd. Mae hyn yn cynnwys talu'r holl drethi ar gyfer allforio a mewnforio, a llenwi'r holl ffurflenni tollau.
Notes: Dyma'r acronym Saesneg a ddefnyddir am Delivered Duty Paid
Last Updated: 10 June 2021
English: DDRB
Welsh: Y Corff Adolygu Meddygon a Deintyddion
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Definition: Doctors’ and Dentists’ Review Body
Last Updated: 28 October 2010
English: DDRS
Welsh: Cynllun Adsefydlu Gyrwyr sy'n Yfed
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Definition: Drink Drive Rehabilitation Scheme
Last Updated: 2 April 2012
English: deactivate
Welsh: analluogi
Status B
Subject: ICT
Part of speech: Verb
Notes: Yng nghyd-destun cyfrifon ar-lein.
Last Updated: 5 March 2025
English: dead-end host
Welsh: organeb letyol derfynol
Status B
Subject: Animals
Part of speech: Noun, Feminine, Singular
Plural: organebau lletyol terfynol
Definition: A host from which infectious agents are not transmitted to other susceptible hosts.
Last Updated: 10 November 2016
English: deadline
Welsh: dyddiad cau
Status C
Subject: Agriculture
Part of speech: Noun, Masculine, Singular
Last Updated: 29 July 2003
English: deadnaming
Welsh: camenwi
Status B
Subject: General
Part of speech: Verb
Definition: Cyfeirio at berson trawsryweddol gan ddefnyddio enw a ddefnyddid gan y person cyn trawsnewid, ee enw genedigol y person.
Last Updated: 1 May 2024
English: deadweight
Welsh: pwysau marw
Status C
Subject: Agriculture
Part of speech: Noun, Masculine, Singular
Definition: The weight of an animal after it has been slaughtered and prepared as a carcass.
Last Updated: 5 November 2003
English: deadweight
Welsh: difuddiant
Status C
Subject: Europe
Part of speech: Noun, Masculine, Singular
Definition: A measure of inefficiency .
Last Updated: 6 November 2003
English: deadweight
Welsh: diffrwythedd
Status B
Subject: Finance and statistics
Part of speech: Noun, Masculine, Singular
Definition: ‘Deadweight’ refers to outcomes which would have occurred without intervention. Its scale can be estimated by assessing what would have happened in the ‘do minimum’ case, ensuring that due allowance is made for the other impacts which impact on net additionality.
Last Updated: 8 July 2016
English: deadweight loss
Welsh: colled ddifuddiant
Status C
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Last Updated: 17 March 2009
English: deadweight tonnage
Welsh: tunelledd llwyth
Status C
Subject: Economic development
Part of speech: Noun, Masculine, Singular
Last Updated: 5 November 2003
English: dead wood
Welsh: coeden farw
Status A
Subject: Environment
Part of speech: Noun, Feminine, Singular
Definition: Coeden sydd wedi marw; cynefin gwerthfawr.
Last Updated: 3 December 2012
English: dead wood
Welsh: pren marw
Status A
Subject: Environment
Part of speech: Noun, Masculine, Singular
Definition: Rhannau marw ar goeden sy'n dal yn fyw; cynefin gwerthfawr.
Last Updated: 3 December 2012
English: Deaf Awareness Week
Welsh: Wythnos Ymwybyddiaeth o fod yn Fyddar
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Last Updated: 10 May 2011
English: deafblind
Welsh: dall fyddar
Status B
Subject: Health
Part of speech: Adjective
Last Updated: 20 February 2020
English: Deafblind Awareness Week
Welsh: Wythnos Ymwybyddiaeth o fod yn Ddall ac yn Fyddar
Status C
Subject: Health
Part of speech: Noun, Feminine, Singular
Last Updated: 10 May 2011
English: deafblindness
Welsh: dallfyddardod
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Definition: Y cyflwr o fod â namau difrifol ar y golwg a'r clyw ar y cyd, gan arwain at anawsterau â chyfathrebu a symud.
Last Updated: 20 February 2020
English: deafened people
Welsh: pobl sydd wedi colli eu clyw
Status C
Subject: Health
Part of speech: Noun, Plural
Last Updated: 6 January 2011
English: deaf people
Welsh: pobl fyddar
Status B
Subject: Personnel
Part of speech: Noun, Plural
Definition: Dim "y byddar" hyd yn oed os ceir the deaf yn Saesneg. Os defnyddir 'Deaf' gyda 'D' fawr bydd angen defnyddio'r briflythyren yn y Gymraeg hefyd am nad yw'n cyfeirio at y cyflwr meddygol ond yn hytrach at yr holl ddiwylliant sydd wedi tyfu o gwmpas iaith arwyddion ac ati.
Last Updated: 21 January 2003
English: dealcoholised
Welsh: wedi ei ddadalcoholeiddio
Status B
Subject: Food
Part of speech: Adjective
Notes: Disgrifydd ar labeli diodydd
Last Updated: 1 August 2018
English: Dealing with Challenging Behaviour in After School Groups and Workshops
Welsh: Delio â Phlant sy'n Ymddwyn yn Anodd mewn Grwpiau a Gweithdai ar ôl Ysgol
Status C
Subject: Education
Part of speech: Verb
Last Updated: 8 December 2004
English: Dealing with Disaster
Welsh: Dealing with Disaster
Status C
Subject: Fire and rescue
Definition: A Home Office publication, provides the strategic framework for integrated emergency planning.
Last Updated: 15 July 2002
English: Dealing with hate crime
Welsh: Delio â throseddau casineb
Status A
Subject: Justice and order
Part of speech: Proper noun
Definition: Slogan marchnata.
Last Updated: 4 December 2013
English: Dean
Welsh: Deon
Status C
Subject: Personnel
Part of speech: Noun, Masculine, Singular
Last Updated: 31 May 2006
English: Dean
Welsh: Deon
Status B
Subject: Religion
Part of speech: Noun, Masculine, Singular
Plural: Deoniaid
Definition: Pennaeth y canoniaid mewn Eglwys Gadeiriol.
Last Updated: 13 August 2020
English: Dean and Chapter
Welsh: Deon a Glwysgor
Status C
Subject: Religion
Part of speech: Noun, Masculine, Singular
Last Updated: 24 March 2010
English: Dean and Chapter of Llandaff Cathedral
Welsh: Y Deon a Chabidwl Eglwys Gadeiriol Llandaf
Status B
Subject: Religion
Part of speech: Noun, Masculine, Singular
Notes: Dyma'r termau Cymraeg a ddefnyddir yn Eglwys Gadeiriol Llandaf yn benodol.
Last Updated: 13 August 2020
English: Dean of Faculty of Education
Welsh: Deon y Gyfadran Addysg
Status C
Subject: Education
Part of speech: Noun, Masculine, Singular
Last Updated: 22 September 2006
English: Dean of Llandaff Cathedral
Welsh: Deon Eglwys Gadeiriol Llandaf
Status B
Subject: Religion
Part of speech: Noun, Masculine, Singular
Plural: Deoniaid Cadeirlan Llandaf
Last Updated: 4 June 2018
English: Dean of School of Nursing and Midwifery Studies
Welsh: Deon yr Ysgol Nyrsio a Bydwreigiaeth
Status C
Subject: Health
Part of speech: Noun, Masculine, Singular
Last Updated: 31 March 2008
English: Death Cafe
Welsh: Caffi Marwolaeth
Status B
Subject: Health
Part of speech: Noun, Masculine, Singular
Definition: At a Death Cafe people, often strangers, gather to eat cake, drink tea and discuss death. Our objective is 'to increase awareness of death with a view to helping people make the most of their (finite) lives'. A Death Cafe is a group directed discussion of death with no agenda, objectives or themes. Death Cafe is a 'social franchise'.
Last Updated: 3 October 2016
English: death certificate
Welsh: tystysgrif marwolaeth
Status B
Subject: Justice and order
Part of speech: Noun, Feminine, Singular
Last Updated: 6 August 2012
English: death certificate reform
Welsh: diwygio tystysgrifau marwolaeth
Status C
Subject: Health
Part of speech: Verb
Last Updated: 17 February 2022
English: death in service
Welsh: marw yn y swydd
Status C
Subject: Health
Part of speech: Verb
Context: neu ‘marw yn eich swydd’, ‘marw yn ei swydd’, ‘marw yn eu swydd’ fel y bo’n briodol
Last Updated: 29 January 2010
English: death management
Welsh: rheoli marwolaethau
Status B
Subject: Health
Part of speech: Verb
Last Updated: 28 April 2020
English: death management system
Welsh: system rheoli marwolaethau
Status A
Subject: Health
Part of speech: Noun, Feminine, Singular
Plural: systemau rheoli marwolaethau
Last Updated: 5 June 2020
English: death rate
Welsh: cyfradd marwolaethau
Status B
Subject: Finance and statistics
Part of speech: Noun, Feminine, Singular
Plural: cyfraddau marwolaethau
Last Updated: 14 December 2022
English: death's-head hawkmoth
Welsh: gwalchwyfyn y benglog
Status C
Subject: Animals
Part of speech: Noun, Masculine, Singular
Definition: Acherontia atropos
Last Updated: 12 March 2010
English: Deaths Record
Welsh: Cofnod Marwolaethau
Status C
Subject: Agriculture
Part of speech: Noun, Masculine, Singular
Context: Of animals.
Last Updated: 13 June 2014
English: debar
Welsh: gwahardd
Status B
Subject: Finance and statistics
Part of speech: Noun, Masculine, Singular
Notes: Yng nghyd-destun prosesau caffael.
Last Updated: 9 February 2023
English: debarment list
Welsh: rhestr rhagwaharddiadau
Status B
Subject: Law
Part of speech: Noun, Feminine, Singular
Plural: rhestrau rhagwaharddiadau
Definition: Rhestr a gedwir gan un o Weinidogion y Goron o dan adran 62 o Ddeddf Caffael 2023, sy'n cynnwys enwau cyflenwyr sy'n gyflenwyr gwaharddedig neu'n gyflenwyr gwaharddadwy, at ddibenion caffael, am resymau penodol.
Notes: Term o faes caffael. Ychwanegwyd i’r gronfa yn sgil Deddf Caffael 2023 (deddfwriaeth Llywodraeth y DU, sydd ar gael yn Saesneg yn unig) a Rheoliadau Caffael (Cymru) 2024. Yn y ddeddfwriaeth ar gaffael, gwahaniaethir rhwng debarment / rhagwaharddiad ac exclusion / gwaharddiad.
Last Updated: 31 July 2024
English: debarment standstill period
Welsh: cyfnod segur rhagwaharddiad
Status B
Subject: Finance and statistics
Part of speech: Noun, Masculine, Singular
Notes: Yng nghyd-destun Deddf Caffael 2023.
Last Updated: 19 March 2025
English: debate pack
Welsh: pecyn dadl
Status C
Subject: Politics
Part of speech: Noun, Masculine, Singular
Definition: Pecyn a baratoir gan Wasanaeth Ymchwil yr Aelodau, i roi gwybodaeth gefndirol am ddadleuon y cyfarfodydd llawn.
Last Updated: 23 September 2004
English: debating chamber
Welsh: siambr drafod
Status B
Subject: Politics
Part of speech: Noun, Feminine, Singular
Last Updated: 25 November 2004
English: debenture
Welsh: dyledeb
Status A
Subject: Law
Part of speech: Noun, Feminine, Singular
Plural: dyledebau
Definition: An unsecured bond.
Last Updated: 25 November 2019
English: debenture
Welsh: debentur
Status A
Subject: Law
Part of speech: Noun, Masculine, Singular
Plural: debenturau
Definition: Tystysgrif i gydnabod dyled.
Last Updated: 23 May 2019