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

• web sites
• websites
• web spinner
• web spinners
• webster
• websters
• web-toed
• webwheel
• webwheels
• webworm
• webworms
• webzine
• wecht
• wechts
• we'd
• wed
• Wed.
• wedded
• Weddell seal
• wedder
• wedding
• wedding anniversaries
• wedding anniversary
• wedding band
• wedding bands