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biennium

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noun bi·en·ni·um \bī-ˈe-nē-əm\

Definition of biennium

plural bienniums or -nia \-nē-ə\

  1. :  a period of two years



Origin of biennium

Latin, from bi- + annus year — more at annual


First Known Use: 1899

Rhymes with biennium


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