semicentennial Hear it!

semicentennial definition

semi·cen·ten·nial (sem′i sen ten′ē əl)

adjective

of or ending a period of 50 years

Etymology: semi- + centennial

noun

a 50th anniversary or its commemoration

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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