| AOB | accessory olfactory bulb; alcohol on breath |
|---|---|
| AOBS | acute organic brain syndrome |
| AOC | abridged ocular chart; amyloxycarbonyl; anodal opening contraction; area of concern |
| AOCA | American Osteopathic College of Anesthesiologists |
| AOCD | American Osteopathic College of Dermatology |
| AOCl | anodal opening clonus |
| AOCN | advanced oncology certified nurse |
| AOCPA | American Osteopathic College of Pathologists |
| AOCPR | American Osteopathic College of Proctology |
| AOCR | American Osteopathic College of Radiology; American Osteopathic College of Rheumatology |