The University of Wales Dictionary of the Welsh Language (GPC)OBJECT LANGUAGEWelshMETALANGUAGEWelsh, EnglishGENREGeneral dictionaries, Historical dictionaries, Etymological dictionarieshttps://geiriadur.ac.uk/gpc/gpc.html
University of Wales Trinity St David Welsh-English / English-Welsh On-line DictionaryOBJECT LANGUAGEWelshMETALANGUAGEWelsh, EnglishGENREGeneral dictionaries, Learners' dictionarieshttp://geiriadur.uwtsd.ac.uk/index.php
Online version of Cysgair and the Termiadur AddysgOBJECT LANGUAGEWelshMETALANGUAGEWelsh, EnglishGENREPortals and aggregators, General dictionaries, Learners' dictionarieshttp://geiriadur.bangor.ac.uk/
Geiriadur Rhywogaethau / A Dictionary of SpeciesOBJECT LANGUAGEWelshMETALANGUAGEWelsh, EnglishGENREDictionaries on special topics, Terminological dictionarieshttps://www.llennatur.cymru/Y-Bywiadur
Coleg Cymraeg Cenedlaethol Terms for Higher EducationOBJECT LANGUAGEWelshMETALANGUAGEWelsh, EnglishGENRETerminological dictionarieshttps://colegcymraeg.ac.uk/termau/
Y porth i adnoddau Gwasanaeth Cyfieithu Llywodraeth Cymru / Portal for the Welsh Government Translation Service’s resourcesOBJECT LANGUAGEWelshMETALANGUAGEWelsh, EnglishGENRETerminological dictionarieshttps://llyw.cymru/bydtermcymru
Welsh National Terminology PortalOBJECT LANGUAGEWelshMETALANGUAGEWelsh, EnglishGENRETerminological dictionaries, Portals and aggregatorshttp://termau.cymru
Standardized terminology for the field of educationOBJECT LANGUAGEWelshMETALANGUAGEWelsh, EnglishGENRETerminological dictionarieshttp://www.termiaduraddysg.org/