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 and Etymology of biennium

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


First Known Use: 1899


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a harsh rebuke

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