Biannual means twice every year.
Bicentennial
bi means two and annual means year so biannual is twice a year. __ As distinct from biennial which means every two years.
Biannual biannual means twice per year. Biennial means every two years or every other year.
every 2years
Biannual.
An event occurs 2 times in a year
Biannual
Biannual means every two years. Semiannual means twice a year.
Biannual describes something that occurs twice a year, once every half year.
Biannually.
Bi-annual = twice a year Bi-ennial = every two years