I.recurring every three years, triennial: “sacra,” the festival of Bacchus, Ov. M. 6, 587; “also called trieterica orgia,” Verg. A. 4, 302. —As subst.: trĭĕtērĭca , ōrum, n., the festival of Bacchus, Ov. R. Am. 593; Stat. Th. 2, 661; id. Achill. 1, 595; Hyg. Fab. 131; cf. trieteris.
trĭĕtērĭcus , a, um, adj., = τριετηρικός,