| AREPA | acetazolamide-responsive familial paroxysmal ataxia |
|---|---|
| ARES | antireticulo-endothelial serum |
| ARF | Acute Renal Failure |
| ARF | acute renal failure; acute respiratory failure; acute rheumatic fever; Addiction Research Foundation; ambulance report form; area resource file |
| ARFC | active rosette-forming T-cell; autologous rosette-forming cell |
| arg | arginine; silver [Lat. argentum] |
| ARG, Arg | arginine |
| ARGS | antitrypsin-related gene sequence |
| ARI | acute respiratory illness; airway reactivity index; anxiety reaction, intense |
| ARIA | acetylcholine receptor-inducing activity; automated radioimmunoassay |