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triennial: Meaning and Definition of

tri•en•ni•al

Pronunciation: (trī-en'ē-ul), [key]
— adj.
  1. occurring every three years.
  2. lasting three years.
—n.
  1. a third anniversary.
  2. something that appears or occurs every three years.
  3. a period of three years; triennium.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
triene triennium
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