| AR | absolute risk; accounts receivable; achievement ratio; actinic reticuloid [syndrome]; active resista... |
|---|---|
| ARC | accelerating rate calorimetry; acquired immunodeficiency syndrome-related complex; active renin conc... |
| ARE | active-resistive exercises; AIDS-related encephalitis |
| ARFC | active rosette-forming T-cell; autologous rosette-forming cell |
| AROM | active range of motion; artificial rupture of membranes |