quincentenary[kwin sen′tə ner ē, kwin′sen ten′ər ē]
quincentenary definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
of a 500th anniversary
noun pl. quincentenaries
a 500th anniversary or its commemoration
quincentenary definition by American Heritage Dictionary
noun pl. quin·cen·ten·a·ries
A 500th anniversary or celebration.adjective
Of or relating to a span of 500 years or to a 500th anniversary.
Origin: From Latin quīngentī, quīncentī, five hundred (on the model of such words as tercentenary); see penkwe in Indo-European roots.