Biannual

a.

1.

Occurring twice a year; half-yearly; semiannual.

Adj.

1.

biannual - occurring or payable twice each year Synonyms: semiannual, biyearly

annual, biennial, bimonthly, biweekly, catamenial, centenary, centennial, daily, decennial, diurnal, fortnightly, hebdomadal, hourly, menstrual, momentary, momently, monthly, quarterly, quotidian, secular, semestral, semiannual, semimonthly, semiweekly, semiyearly, tertian, triennial, weekly, yearly