bi|an|nu|al

bi|an|nu|al «by AN yu uhl», adjective.

occurring twice a year: »

Our school nurse recommends a biannual visit to the dentist.

–bi|an´nu|al|ly, adverb.

Usage biannual, biennial. Biannual means occurring twice a year; it differs from the more common semiannual in not necessarily implying a six months' interval: »

The biannual examinations are held in May and October. Biennial

means occurring once in two years, or lasting two years: »

At one time the legislature held biennial sessions. Foxgloves and hollyhocks are biennial plants.