Lewis Short
(adjective) : Trīnācrĭa, ae, f., = Τρινακρία (with three promontories)
* The island of Sicily, Verg. A. 3, 440; 3, 582; Ov. P. 4, 15, 15; id. M. 5, 476; Just. 4, 2, 1.—Hence
* Trīnā-crĭus, a, um, , Trinacrian, Sicitian: Pachynus,Verg. A. 3, 429: Aetna,id. ib. 3, 554; also called Trinacria rupes,Cat. 68, 53: mare,Ov. F. 4, 287: unda,Verg. A. 3, 384: litus,id. ib. 1, 196: viri,id. ib. 5, 530: pubes,id. ib. 5, 450: equi,id. ib. 5, 573.
* Trīnācris, ĭdis, adj. f., Trinacrian, Sicilian: terra, i. e. Trinacria or Sicily, Ov. F. 4, 420; also called Trinacris insula,id. M. 5, 347: Hybla,id. Tr. 5, 13, 22.—Subst.: Trīnăcris (sc. insula), the island of Trinacria, Sicily, Ov. P. 2, 10, 22.
Charlton T. Lewis, Charles Short, A Latin Dictionary