occurring every 20 years relating to or lasting for a period of 20 years
WordReference Random House Unabridged Dictionary of American English © 2025
vi•cen•ni•al
(vī sen′ē əl),USA pronunciation adj.
- of or for 20 years.
- occurring every 20 years.
- Latin vīcenni(um) twenty-year period (vīc(ēnī) twenty each + -enn(us), combining form of annus year + -ium -ium) + -al1
- 1730–40
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