Уэльс тілінің тарихи сөздігі

Historical dictionary of the Welsh language

Geiriadur Prifysgol Cymru (GPC) (The University of Wales Dictionary) is the only standard historical dictionary of the Welsh language, aspiring to be "comparable in method and scope to the Oxford English Dictionary". Vocabulary is defined in Welsh, and English equivalents are given. Detailed attention is given to variant forms, collocations, and etymology. The first edition was published in four volumes between 1967 and 2002, containing 7.3 million words of text in 3,949 pages, documenting 106,000 headwords. There are almost 350,000 dated citations dating from the year 631 up to 2000, with 323,000 Welsh definitions and 290,000 English equivalents, of which 85,000 have included etymologies.

In 1921, a small team at the National Library of Wales, Aberystwyth, organised by the Rev. J. Bodvan Anwyl, arranged for volunteer readers to record words. The task of editing the dictionary was undertaken by R. J. Thomas in the 1948/49 academic year. The first edition of Volume I appeared in 1967, followed by Volume II in 1987, Volume III in 1998, and Volume IV, edited by Gareth A. Bevan and P. J. Donovan, in December 2002. Work then immediately began on a second edition. GPC Online attracted 10,251 visitors to its search page on the first day after launch. A year later, on 24 February 2016, free mobile and tablet applications for the Dictionary were announced and launched. To accompany the launch, more than 400 new words were added to the dictionary. Within a week of the launch, over a thousand people had downloaded the application.