"of or pertaining to Great Britain," 1640s, from Latin Britannicus, from Britannia (see Britain).
Entries linking to britannic
Britain n.
proper name of the island containing England, Scotland, and Wales, c. 1300, Breteyne, from Old French Bretaigne, from Latin Britannia, earlier Brittania, from Brittani "the Britons" (see Briton). The Old English place-name Brytenlond meant "Wales." If there was a Celtic name for the island, it has not been recorded.