bicentennial
From Longman Dictionary of Contemporary EnglishRelated topics: Chronologybicentennialbi‧cen‧ten‧ni‧al /ˌbaɪsenˈteniəl/ noun [countable] American EnglishTMC the day or year exactly 200 years after an important event the bicentennial of the Declaration of Independence —bicentennial adjective bicentennial celebrationsExamples from the Corpusbicentennial• But did you know that this mechanical wonder is celebrating its bicentennial?