quinquennial

英 [kwɪŋ'kwenɪəl] 美 [kwɪn'kwɛnɪəl]
  • adj. 每五年的;持续五年的
  • n. 五周年纪念;五年期间;每五年发生一次的事件
quinquennial
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quinquennial (adj.)
late 15c., "lasting five years," from Latin quinquennis "of five years, celebrated every fifth year," from quinque- "five" (see quinque-) + ending from biennial, etc. Meaning "happening once every five years" attested from c. 1600. As a noun from 1895; earlier quinquennal (1610s).