| ACTA | American Cardiology Technologists Association; automatic computerized transverse axial [scanning] |
|---|---|
| ACS | acrocallosal syndrome; acrocephalosyndactyly; acute chest syndrome; acute confusional state; Alcon C... |
| AAN | AIDS-associated nephropathy; alpha-amino nitrogen; American Academy of Neurology; American Academy o... |
| ADA | adenosine deaminase; American Dental Association; American Dermatological Association; American Diab... |
| AGA | accelerated growth area; allergic granulomatosis and angiitis; American Gastroenterological Associat... |