| ANAP | agglutination negative, absorption positive [reaction] |
|---|---|
| AR | absolute risk; accounts receivable; achievement ratio; actinic reticuloid [syndrome]; active resista... |
| 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 |