This is a dictionary of the Welsh language.
"synopsis" may belong to another edition of this title.
R.J. Thomas was the first Editor of the Geiriadur Prifysgol Cymru from 1948-1975, and an authority on place names (see 'Enwau Afonydd a Nentydd Cymru', Gwasg Prifysgol Cymru, 1938).
"About this title" may belong to another edition of this title.