Related topics: Chronology
bi·cen·ten·ni·al /ˌbaɪsenˈteniəl/ noun [countableC] American EnglishAmETMC the day or year exactly 200 years after an important event 二百周年（纪念） the bicentennial of the Declaration of Independence 《独立宣言》发表二百周年纪念
—bicentennial adjectiveadj bicentennial celebrations 二百周年庆典