AAMI (age-associated memory impairment)

AAO (American Academy of Ophthalmology)

AAO (awake, alert, and oriented)

AAOS (American Academy of Orthopedic Surgeons)

AAR (after action review/report)

AAT (alpha-1-antitrypsin)

AAU (acute anterior uveitis)

Ab (abortion)

Ab (antibody)

Ab (abdominal)