Lewis Short
(adj.adj.) : Celtae, ārum, m., = Κελταί
* A great parent - stock of people in the north of Europe, the Celts; among the Romans, in a more restricted sense, the inhabitants of Middle Gaul, Caes. B. G. 1, 1; Liv. 5, 34, 1; Mel. 3, 2, 4; cf. Plin. 4, 17, 31, § 105 sq.
* Hence deriv.: Celtĭcus, a, um, adj.
* Celtic, of Middle Gaul: Gallia,Plin. 4, 17 31, § 105: spolia,id. 8, 3, 3, § 6.—* Adv.: Celtĭcē, in the Celtic language, Plin. 33, 3, 12, § 40; Sulp. Sev. Dial. 1, 27.
* (Acc. to the wide signif. of the Greeks.) Celtĭci, ōrum, m., a people in interior Spain and on the river Guadiana, Mel. 3, 1, 8; 3, 6, 2; Plin. 4, 20, 34, § 111; also adj.: Celtica gens,Mel. 3, 1, 9; and Promonturium, in Galloecia, now Capo Finisterre, id. 3, 1, 7; Plin. 4, 20, 34, § 111.
* (In a broader sense.) Celtic = of Upper Italy: rura,Sil. 1, 46.
* Celtĭca, ae, f. (sc. terra), the Celtic country, Plin. 3, 1, 3, § 14; 6, 13, 14, § 34.
* Celtĭcum, i, n. (sc. nomen or imperium), the Celtic nation, Celts, Liv. 5, 34, 1.
Charlton T. Lewis, Charles Short, A Latin Dictionary