1832, "pertaining to a period of 300 years," from ter- "three times" + centenary. As a noun from 1835. Related: Tercentennial (1862 as an adjective; 1872 as a noun).
实用例句
1. the tercentenary of the school's foundation
建校三百周年纪念
来自《权威词典》
2. This year sees the tercentenary of Handel's birth.