biennial /bī-enˈi-əl or -enˈyəl/

1. Lasting two years
2. Happening or appearing once in two years

1. A plant that flowers and fruits only in its second year, then dies
2. An event taking place or being celebrated every two years

biennˈially adverb

• contractionary
• contractions
• contractive
• contractor
• contractors
• contract out
• contracts
• contractual
• contractually
• contractural
• contracture
• contractures
• contracyclical
• contradance
• contradances
• contradict
• contradictable
• contradicted
• contradicting
• contradiction
• contradiction in terms
• contradictions
• contradictious
• contradictiously
• contradictive