a. [ L. trietericus, Gr. &unr_;, fr. &unr_; (sc. &unr_;) a triennial festival; &unr_; (see Tri-.) + &unr_; a year. ] Kept or occurring once in three years; triennial. [ R. ] J. Gregory. [ 1913 Webster ]

n. pl. [ L. trieterica, pl., fr. Gr. &unr_; of a triennial festival. ] (Class. Antiq.) Festival games celebrated once in three years. [ R. ] May. [ 1913 Webster ]