Home › Words › T › tercentenarytercentenarytercentenary · adj — synonym of tricentennial (“of or relating to a 300th anniversary”).Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom ter- + centenary, after Latin ter centēnī (“three hundred each”).adjSynonym of tricentennial (“of or relating to a 300th anniversary”).nounSynonym of tricentennial (“a 300th anniversary”).Definitions & examples from Wiktionary (CC BY-SA 3.0).