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

• crossbirths
• crossbit
• crossbite
• crossbites
• crossbiting
• crossbitten
• crossbones
• cross-border
• crossbow
• crossbower
• crossbowers
• crossbowman
• crossbowmen
• crossbows
• crossbred
• crossbreed
• crossbreeding
• crossbreedings
• crossbreeds
• crossbuck
• crossbucks
• cross bun
• cross-buttock
• cross-buttocks
• crosscheck