triennial
/tɹaɪˈɛni.əl/ adjective, noun
Forms triennials
- adjective Happening every three years. “triennial elections”
- adjective Lasting for three years. “triennial parliaments; a triennial reign”
- noun A third anniversary.
- noun A plant that requires three years to complete its life-cycle.
Synonyms
Etymology
From Latin triennium (“three-year period”), from tres (“three”) + annus (“year”). By surface analysis, tri- + -ennial.
Webster’s 1913
- adjective Continuing three years; as, triennial parliaments; a triennial reign. Howell.
- adjective Happening, coming about, or appearing once in every three years; as, triennial elections; a triennial catalogue; a triennial visitation. T. Warton.
- noun Something which takes place or appears once in three years.
Etymology [L. triennium the space of three years; tri- (see Tri-) + annus year. See Annual.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “triennial”, CC BY-SA 4.0. Details