1. Twice a year
   "we hold our big sale biannually"

See also: biannual

• ark shell
• Arkansan
• Arkansas
• Arkansas kingbird
• Arkansas River
• Arkansawyer
• arkose
• arles
• Arlington
• arm
• arm bone
• arm candy
• arm exercise
• arm in arm
• arm pad
• arm's length
• arm-twisting
• armada
• Armadillidiidae
• Armadillidium
• armadillo
• Armageddon
• Armagnac
• armament
• armamentarium