VICENNIAL


Meaning of VICENNIAL in English

(ˈ)vī|senēəl adjective

Etymology: Late Latin vicenni um period of 20 years (from Latin vicies 20 times + -ennium, from annus year) + English -al; akin to Latin viginti twenty — more at annual

: occurring once every 20 years

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.