biennium/bieʹeni·əm/ noun (pl bienniums biennia /-ə/)

• authority
• authorize
• Authorized Version
• author language
• authorship
• autism
• auto
• auto-
• autoantibody
• autobahn
• autobiography
• autocephalous
• autochthon
• autochthonous
• autoclave
• autocracy
• autocrat
• autocross
• Autocue
• auto-da-fé
• autodidact
• auto-erotism
• autofocus
• autogamy
• autogenic