- happening every two years: biennial games.
- lasting or enduring for two years: a biennial life cycle.
- Botany. completing its normal term of life in two years, flowering and fruiting the second year, as beets or winter wheat.
- any event occurring once in two years.
- Botany. a biennial plant.
Origin of biennial
Examples from the Web for biennial
Those are results of the biennial Chicago Council on Global Affairs survey of public opinion on foreign policy (PDF).Who Else Opposes An Iran Attack?
September 11, 2012
At the Biennial, only a very few artworks escape to stand on their own.Whitney Museum’s Biennial: A Big Yawn
March 1, 2012
She had similar fears when 2010 Biennial curators Bonami and Gary Carrion-Murayari came calling last year.The Biennial's Breakout Star
February 25, 2010
The state legislature had assembled in biennial session that winter.The Rainy Day Railroad War
Biennial means lasting two years or occurring once in two years.Orthography
Elmer W. Cavins
The sessions, however, were biennial, and could only be convened by authority of the Governor.A Military Genius
Sarah Ellen Blackwell
It is a biennial plant, and is cultivated for its leaves and leaf-stalks.The Field and Garden Vegetables of America
Elections in the Senate are of three sorts: annual, biennial, and extraordinary.The Commonwealth of Oceana
- occurring every two years
- lasting two yearsCompare biannual
Word Origin and History for biennial
"lasting for two years" (1620s); "occurring every two years" (1750), from Latin biennium "two-year period," from bi- (see bi-) + annus "year" (see annual). The vowel change is "due to the Latin phonetic law according to which the unaccented and closed radical syllable of the second element of compounds, original -ă- becomes -ĕ-" [Klein]. The noun meaning "a biennial plant" is attested by 1770.
- Completing a life cycle normally in two growing seasons.
- A biennial plant. In the first year, biennials normally produce a short stem, a rosette of leaves, and a fleshy root that acts as food supply. In the second season, biennials blossom, produce seed, use up their food supply, and die. Carrots, parsnips, and sugar beets are examples of biennials. Compare annual perennial.