| ACO | acute coronary occlusion; alert, cooperative, and oriented; anodal closure odor |
|---|---|
| ACO-HNS | American Council of Otolaryngology-Head and Neck Surgery |
| ACOA | adult children of alcoholics |
| ACoA | anterior communicating artery |
| ACOEM | American College of Occupational and Environmental Medicine |
| ACOEP | American College of Osteopathic Emergency Physicians |
| ACOG | American College of Obstetricians and Gynecologists |
| ACOHA | American College of Osteopathic Hospital Administrators |
| ACOI | American College of Osteopathic Internists |
| ACOM | American College of Occupational Medicine; anterior communicating [artery] |