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biennial definition

bi·en·nial (bī en′ē əl)

adjective

  1. happening every two years
  2. lasting or living two years

Etymology: < L biennium, period of two years < bi-, bi- + annus, year + -al

noun

  1. a biennial event or occurrence
  2. Bot. a plant that lasts two years, usually producing flowers and seed the second year

Related Forms:

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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