sesquicentennial Hear it!

sesquicentennial definition

☆ sesqui·cen·ten·nial (-sen ten′ē əl, -ten′yəl)

adjective

of or ending a period of 150 years

noun

a 150th anniversary or its commemoration

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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