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triennial

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adjective tri·en·ni·al \(ˌ)trī-ˈe-nē-əl\

Definition of triennial

  1. 1 :  occurring or being done every three years <the triennial convention>

  2. 2 :  consisting of or lasting for three years <a triennial contract>

triennial noun
tri·en·ni·al·ly play \-nē-ə-lē\ adverb


1562

First Known Use of triennial

1562


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