Biannual vs. Biennial

Biannualadjective

Occurring twice a year; semiannual.

Biannualadjective

(proscribed) Occurring once every two years; biennial.

Biannualnoun

Something occurring twice each year.

Biannualadjective

Occurring twice a year; half-yearly; semiannual.

Biannualadjective

occurring or payable twice each year

Biennialadjective

Happening every two years.

Biennialadjective

Lasting for two years.

Biennialnoun

A plant that requires two years to complete its life-cycle, germinating and growing in its first year, then producing its flowers and fruit in its second year, after which it usually dies.

Biennialadjective

Happening, or taking place, once in two years; as, a biennial election.

Biennialadjective

Continuing for two years, and then perishing, as plants which form roots and leaves the first year, and produce fruit the second.

Biennialnoun

Something which takes place or appears once in two years; esp. a biennial examination.

Biennialnoun

A plant which exists or lasts for two years.

Biennialnoun

a plant having a life cycle that normally takes two seasons from germination to death to complete; flowering biennials usually bloom and fruit in the second season

Biennialadjective

occurring every second year;

Biennialadjective

having a life cycle lasting two seasons;

Biennialadjective

taking place every other year

Biennialadjective

(of a plant) taking two years to grow from seed to fruition and die.

Biennialnoun

a biennial plant.

Biennialnoun

an event celebrated or taking place every two years