| USR | Unheated Serum Reagin |
|---|---|
| ACS | acrocallosal syndrome; acrocephalosyndactyly; acute chest syndrome; acute confusional state; Alcon C... |
| AES | acetone-extracted serum; American Electroencephalographic Society; American Encephalographic Society... |
| AFS | acquired or adult Fanconi syndrome; alternative financing system; American Fertility Society; antifi... |
| AGGS | anti-gas gangrene serum |