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vicennial

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adjective vi·cen·ni·al \vī-ˈse-nē-əl\

Definition of vicennial

  1. :  occurring once every 20 years



Origin and Etymology of vicennial

Late Latin vicennium period of 20 years, from Latin vicies 20 times + annus year; akin to Latin viginti twenty — more at vigesimal, annual


First Known Use: circa 1859


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