| ARAL | adjustment reaction to adult life |
|---|---|
| ARD | absolute reaction of degeneration; acute radiation disease; acute respiratory disease; adult respira... |
| ARI | acute respiratory illness; airway reactivity index; anxiety reaction, intense |
| ARM | adrenergic receptor material; aerosol rebreathing method; ambulatory renal monitor; anorectal manome... |
| ARMS | adverse reaction monitoring system; amplification refractory mutation system |