1. Occurring or payable twice each year
   - semiannual, biannual, biyearly

1. Every half year, every six months

See also: periodic, periodical

• flay
• flea
• flea beetle
• flea bite
• flea market
• flea-bitten
• fleabag
• fleabane
• fleapit
• fleawort
• flecainide
• fleck
• flecked
• flection
• fledge
• fledged
• fledgeless
• fledgeling
• fledgling
• flee
• fleece
• fleeceable
• fleecer
• fleecy
• fleer