Germanic (adj.)

1630s, "of Germany or Germans," from Latin Germanicus, from Germani (see German (n.)). From 1773 as "of the Teutonic race;" from 1842 especially with reference to the language family that includes German, Dutch, English, etc. As a noun, the name of that language family, by 1892, replacing earlier Teutonic. Germanical is attested from 1550s.

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Definitions of Germanic from WordNet
Germanic (adj.)
of or relating to the language of Germans;
Germanic (adj.)
of or pertaining to the ancient Teutons or their languages;
Synonyms: Teutonic
Germanic (n.)
a branch of the Indo-European family of languages; members that are spoken currently fall into two major groups: Scandinavian and West Germanic;
Synonyms: Germanic language