| AGC | Automatic Gain Control |
|---|---|
| AICD | Automatic Implantable Cardioverter Defibrillator |
| AAT | Aachen Aphasia Test; academic aptitude test; alanine aminotransferase; alkylating agent therapy; alp... |
| ACA | abnormal coronary artery; acrodermatitis chronica atrophicans; acute cerebellar ataxia; adenocarcino... |
| ACID | Arithmetic, Coding, Information, and Digit Span; automatic implantable cardioverter defibrillator |