vicennial Hear it!

vicennial definition

vi·cen·nial (vī sen′ē əl)

adjective

  1. happening every twenty years
  2. lasting twenty years

Etymology: LL vicennialis < L vicennium, period of twenty years < vicies, twenty times + annus, year (see annual)

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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