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 (brĭ-tŏn′ĭk) also Bry·thon·ic (-thŏn′-)
The subdivision of the Insular Celtic languages that includes Welsh, Breton, and Cornish.

[Ultimately from Latin Brittonēs, Britons; see Briton.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, adj
(Languages) another word for Brythonic
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(brɪˈθɒn ɪk)

also Brittonic

1. the subgroup of modern Celtic languages represented by Welsh, Cornish, and Breton.
2. the Celtic language ancestral to these languages; British Celtic.
3. of or pertaining to Brythonic.
[1884; < Welsh Brython Briton]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
LLANELLI Llan and its variants (Breton 'lan', Cornish 'lann', Pictish 'lhan') are common placename elements in Brythonic languages. Llanelli is named after its association with St Elli, a sixth century precongregational saint of South Wales and now Llanelli's patron saint.
Should be preserved with the other Brythonic languages. Natalie Evans-Wilson Welsh people have to pay for the TV licence too, so why cant they have programmes for them.
Although certainly closely related to the Irish Gaelic of Ulster and Munster, and to Scottish west-coast Gaelic, and much less closely to the Brythonic languages of Cornwall, Wales, and Brittany (5), certain words and pronunciations were purely Manx.