vicennial

[ vahy-sen-ee-uh l ]
/ vaɪˈsɛn i əl /

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

Words nearby vicennial

vicegeral, vicegerency, vicegerent, viceless, vicenary, vicennial, vicente, vicente lópez, vicenza, viceregal, viceregal assent

British Dictionary definitions for vicennial

vicennial
/ (vɪˈsɛnɪəl) /

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