| AACC | American Association for Clinical Chemistry |
|---|---|
| AACIA | American Association for Clinical Immunology and Allergy |
| ACA | abnormal coronary artery; acrodermatitis chronica atrophicans; acute cerebellar ataxia; adenocarcino... |
| ACS | acrocallosal syndrome; acrocephalosyndactyly; acute chest syndrome; acute confusional state; Alcon C... |
| BCIA | Biomedical Clinical Instrumentation Association |