| ARC-ST | Accreditation Review Council for Educational Programs in Surgical Technology |
|---|---|
| ARCA | acquired red cell aplasia |
| ARCI | Addiction Research Center Inventory |
| ARCS | Associate of the Royal College of Science |
| ARD | absolute reaction of degeneration; acute radiation disease; acute respiratory disease; adult respiratory distress; allergic respiratory disease; anorectal dressing; arthritis and rheumatic diseases; atopic respiratory disease |
| ARDMS | American Registry of Diagnostic Medical Sonographers |
| ARDS | Adult Respiratory Distress Syndrome |
| ARDS | acute respiratory distress syndrome; adult respiratory distress syndrome |
| ARE | active-resistive exercises; AIDS-related encephalitis |
| AREDYLD | acrorenal field defect, ectodermal dysplasia, lipoatrophic diabetes [syndrome] |