| Abbreviation | Definition |
|---|---|
| AC | anterior commissure |
| AC | aortic compliance |
| AC | arabinosyl cytosine |
| AC | arm circumference |
| AC | ascending colon |
| AC | assist control |
| AC | atrial contraction |
| AC | Audit Commission |
| AC | augmentative communication |
| ACA | acetoacetate |
| ACA | acquired child aphasia |
| ACA | acrodermatitis chronica atrophicans |
| ACA | acute cerebellar ataxia |
| ACA | acute cutaneous anaphylaxis |
| ACA | adenylyl cyclase A |
| ACA | adrenal cortex autoantibodies |
| ACA | aminocaproic acid |
| ACA | anterior cerebral artery |
| ACA | anterior communicating artery |
| ACA | anti-cardiolipin antibody |