bienal

Etymology
.

Adjective

 * 1) biennial happening every two years

Noun

 * 1) biennial exhibition or show
 * 2)  a plant whose lifespan lasts two years

Etymology
.

Noun

 * 1) biennial

Adjective

 * 1) biennial, two-year

Noun

 * 1) biennial exhibition or show