vigintennial

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English

Etymology

From viginti- (twenty) +‎ -ennial (yearly), from Latin vīgintī (twenty) and -enniālis, from annus (year) + -is (forming compound adjectives) + -ālis (-al: forming adjectives).

Adjective

vigintennial (not comparable)

  1. (rare) Synonym of vicennial, occurring every twenty years.

References