| AHS | Academy of Health Sciences; African horse sickness; alveolar hypoventilation syndrome; American Hear... |
|---|---|
| AOS | American Ophthalmological Society; American Otological Society; anodal opening sound; anterior [o]es... |
| ARS | acquiescence response scale; adult Reye's syndrome; alcohol-related seizures; alizarin red S; Americ... |
| ASCO | American Society of Clinical Oncology; American Society of Contemporary Ophthalmology |
| ASCP | American Society of Clinical Pathologists; American Society of Consulting Pharmacists |