Ap Geiriaduron

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The Ap Geiriaduron contains the Cysgair general dictionary, as well as the standardized terminology dictionaries for schools and further education colleges in Wales, Y Termiadur Addysg, and for Universities in Wales, Geiriadur Termau’r Coleg Cymraeg Cenedlaethol. All these dictionaries provide English-Welsh/Welsh-English entries and can be used offline where there is no internet connection.


  • Realtime, responsive and adaptive searching
  • Offline dictionary for anytime searches
  • Universal Application (iPad and iPhone) with Retina Display Graphics
  • English and Welsh user interface languages, with the ability to change language in Settings
  • Demutates and deconjugates Welsh words to show their original form.
  • ‘Drill down’ feature to find more detailed information on specific words
  • Wildcard Welsh searches; e.g. use it as a rhyming dictionary by searching for ‘*aith’ to find all words ending in ‘aith’
  • Contains the Cysgair Dictionary, an easy to use descriptive dictionary with over 25,000 Welsh and 25,000 English words
  • Contains ‘Y Termiadur Addysg‘ dictionary; funded by the Welsh Government as the dictionary of standardized terminology for schools and further education
  • Contains the Geiriadur Termau’r Coleg Cymraeg; containing definitions, images and diagrams; funded by the Coleg Cymraeg Cenedlaethol as the dictionary of standardized terminology for Welsh-medium higher education
  • Provides a gateway to the National Terminology Portal at termau.cymru for expanded searches
  • Automatic updating of dictionaries as new words, terms and dictionaries are added

The Ap Geiriaduron is a Bangor University application, part-funded by a Go Wales graduate scheme. Adaptations were funded by the Coleg Cymraeg Cenedlaethol’s small grants scheme in order to be able to include the definitions, images and diagrams in their dictionary.

Patrick Robertson, David Chan, Dewi Bryn Jones.

Delyth Prys, Gruffudd Prys, Tegau Andrews