from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The subdivision of the Insular Celtic languages that includes Welsh, Breton, and Cornish.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Alternative form of Brythonic.
Ultimately from Latin Brittonēs, Britons; see Briton.(American Heritage® Dictionary of the English Language, Fourth Edition)