vicennial

[vahy-sen-ee-uh l]

adjective

of or for 20 years.

occurring every 20 years.

Origin of vicennial

1730–40; < Latin vīcenni(um) twenty-year period (vīc(ēnī) twenty each + -enn(us), combining form of annus year + -ium -ium) + -al¹

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British Dictionary definitions for vicennial

vicennial

adjective

occurring every 20 years

relating to or lasting for a period of 20 years

Word Origin for vicennial

C18: from Late Latin vīcennium period of twenty years, from Latin vīciēs twenty times + -ennium, from annus year

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