Lewis & Short

Raeti (Rhaeti), ōrum, m., the Rætians, a mountain people north of the Po, between the Danube, the Rhine, and the Lech, Plin. 3, 20, 24, § 133; 3, 19, 23, § 130; Liv. 5, 33 fin.; Just. 20, 5, 9; Tac. H. 1, 68; 3, 5; 53; Hor. C. 4, 14, 15 al.
Hence,

    1. 1. Raetia (Rhaetia), ae, f., the country of the Ræti, Rætia, Tac. A. 1, 44; id. H. 2, 98; 3, 5 et saep.
    2. 2. Raetĭcus (Rhaetĭcus), a, um, adj., Rætian: oppida, Plin. 3, 19, 23, § 130: Alpes, Tac. G. 1: bellum, Suet. Tib. 9: arma, Ov. Tr. 2, 226: copiae, Tac. H. 1, 59 fin.: vinum (of excellent quality), Verg. G. 2, 96; Col. 3, 2, 27; Plin. 14, 1, 3, § 16; 14, 6, 8, § 67; Suet. Aug. 77; Mart. 14, 100 al.
    3. 3. Raetius, a, um, adj., Rætian: provincia, Tac. G. 41.
    4. 4. Raetus, a, um, adj., Rætian: Alpes, Hor. C. 4, 4, 17.