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

• closed-loop
• close down
• closedown
• closed population
• closed populations
• closed scholarship
• closed scholarships
• closed season
• closed set
• closed sets
• closed shop
• closed shops
• closed syllable
• closed syllables
• close encounter
• close encounters
• close-fisted
• close-fitting
• close-grained
• close-handed
• coccus
• coccygeal
• coccyges
• coccygian
• coccyx