triennial

Tri*en"ni*al, a. Etym: [L. triennium the space of three years; tri- (see Tri-) + annus year. See Annual.] 1. Continuing three years; as, triennial parliaments; a triennial reign. Howell. 2. Happening, coming about, or appearing once in every three years; as, triennial elections; a triennial catalogue; a triennial visitation. T. Warton. Tri*en"ni*al, n. Defn: Something which takes place or appears once in three years.

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