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triennial
triennial definition
tri·en·nial (trī en′ē əl)
adjective
- happening every three years
- lasting three years
Etymology: < L triennium, three years < tri-, tri- + annus, year: see annual
noun
a triennial event or occurrence
Related Forms:
- triennially tri·en′·ni·ally adverb
Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
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