biannual• It is for the benefit of the inspectors who come up from Paris for the biannual audits.• An independent data and safety monitoring board compared the frequency of all adverse events in the two groups during three biannual meetings.• In late spring, Jody flies to San Francisco for the biannual Pac-10 coaches meeting.
From Longman Business Dictionary
biannualbi·an·nu·al /baɪˈænjuəl/adjectiveadj
happening twice each year
Wildlife Link’s biannual liaison meeting with the Forestry Committee