biennium

[ bahy-en-ee-uh m ]
/ baɪˈɛn i əm /

noun, plural bi·en·ni·ums, bi·en·ni·a [bahy-en-ee-uh] /baɪˈɛn i ə/.

a period of two years.

Origin of biennium

1895–1900; < Latin, equivalent to bi- bi-1 + -enn- (combining form of annus year) + -ium -ium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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