| AASH | adrenal androgen stimulating hormone; American Association for the Study of Headache |
|---|---|
| AASP | acute atrophic spinal paralysis; American Association of Senior Physicians; ascending aorta synchron... |
| AASS | American Association for Social Security |
| AATS | American Association for Thoracic Surgery |
| AAVMC | Association of American Veterinary Medical Colleges |