bio/ʹbieoh/ noun (pl -os) (pl bios) informal

• ATP
• at peace
• at present
• atrabilious
• at random
• atrazine
• a treat
• atresia
• at rest
• a trifle
• at right angles
• a trip/walk down memory lane
• at risk
• atrium
• atrocious
• atrocity
• atrophy
• atropine
• at sea
• at second hand
• at sixes and sevens
• at somebody's back
• at somebody's beck and call
• at somebody's expense
• at somebody's (own) risk