BIANNUAL
Meaning of BIANNUAL in English
bi ‧ an ‧ nu ‧ al /baɪˈænjuəl/ BrE AmE adjective
happening twice each year:
a biannual report
⇨ annual
, biennial
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012