adjective Also biyearly (for defs 1, 2).
- bien entendu,
- bien hoa,
- bienville, jean baptiste le moyne, sieur de
Origin of biennial
Examples from the Web for biennially
Legislature and State officers elected quadrennially; members Congress, biennially.Alden's Handy Atlas of the World|John B. Alden
This can be done annually or biennially according to whether the plants are growing strongly or not.Trees and Shrubs for English Gardens|Ernest Thomas Cook
The congress was to meet annually in time of common war, and biennially in times of peace.Martin Van Buren|Edward M. Shepard
In some states the legislatures meet annually; in others, biennially.Why We Punctuate|William Livingston Klein
Both were biennially elected, and the compensation of each was fixed at 5% on the amount of the state tax assessed and collected.
"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.