Lewis & Short

Gyăros, i, and Gyăra, ae, f., and Gyăra, ōrum, n., = Γύαρος, Γύαρα, a small barren island in the Ægean Sea, one of the Cyclades, used by the Romans under the empire as a place of exile for criminals, now Chiura, Cic. Att. 5, 12, 1 sq.; Varr. ap. Plin. 8, 29, 43, § 104; Verg. A. 3, 76; Tac. A. 3, 68 sq.; 4, 30; Juv. 10, 170; 1, 73; Plin. 4, 12, 23, § 69; 8, 57, 82, § 222.