vicennial

[ vahy-sen-ee-uhl ]

adjective

1. of or for 20 years.
2. occurring every 20 years.

vicennial

/ vɪˈsɛnɪəl /

adjective

1. occurring every 20 years
2. relating to or lasting for a period of 20 years

Word History and Origins

Origin of vicennial¹

1730–40; < Latin vīcenni ( um ) twenty-year period ( vīc ( ēnī ) twenty each + -enn ( us ), combining form of annus year + -ium -ium ) + -al ¹

Word History and Origins

Origin of vicennial¹

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