CELTIC
Celtic, Gaelic
(adjective) relating to or characteristic of the Celts
Celtic, Celtic language
(noun) a branch of the Indo-European languages that (judging from inscriptions and place names) was spread widely over Europe in the pre-Christian era
Source: WordNet® 3.1
Celt"ic, a. Etym: [L. Celticus, Gr. Celt.]
Definition: Of or pertaining to the Celts; as, Celtic people, tribes,
literature, tongue. [Written also Keltic.]
Celt"ic, n.
Definition: The language of the Celts.
Note: The remains of the old Celtic language are found in the Gaelic,
the Erse or Irish the Manx, and the Welsh and its cognate dialects
Cornish and Bas Breton.
Source: Webster’s Unabridged Dictionary 1913 Edition