Definition of P-Celtic in English:

P-Celtic

noun & adjective

  • another term for Brythonic
    • ‘They were linked by common origins and language (P-Celtic spoken in Gaul and Britain, and Q-Celtic spoken in Ireland), some fairly common religious traditions and a close similarity of laws.’
    • ‘Philologists have referred to them as P-Celtic in contrast to Goidelic as Q-Celtic, on the basis of a sound shift of q to p which split an earlier tongue known as Common Celtic.’
    • ‘The Celts of Gaul and Britain spoke what was called P-Celtic, this would be the ancestor of the Welsh and Breton form of Celtic.’

Origin

P, from the development of the Indo-European kw sound into p in this group of languages.