semicentennial / ˌsɛm i sɛnˈtɛn i əl, ˌsɛm aɪ- /

📖毕业后词汇半世紀半周年纪念半世纪半年纪念

semicentennial 的 2 个定义

adj. 形容词 adjective
  1. of or relating to a fiftieth anniversary.
n. 名词 noun
  1. a fiftieth anniversary.
  2. the celebration of this anniversary.