B0235600 (bī-ĕn′ē-əm)n.pl.bi·en·ni·ums or bi·en·ni·a(-ĕn′ē-ə) A two-year period.[Latin : bi-, two; see bi-1 + annus, year; see at- in Indo-European roots.]
biennium
(baɪˈɛnɪəm) na period of two years
bi•en•ni•um
(baɪˈɛn i əm)
n., pl. -en•ni•ums, -en•ni•a (-ˈɛn i ə) a period of two years. [1895–1900; < Latin]TranslationsbiennioEncyclopediaSeebiennial