quingenary/kwɪnˈd͡ʒɛn(ə)ɹi/EtymologyFrom Latin quīngēnārius (“containing 500”), from Latin quīngēnī (“500 each”) + -ārius (“-ary”), from quīngentī (“five hundreds”). Cognate with quingenarious and quinquagenary.adjOf or related to units of 500 men.nounSynonym of quincentennial: A 500th anniversary.