| APN | acute pyelonephritis; advanced practice nurse; average peak noise |
|---|---|
| APR | abdominoperineal resection; absolute proximal reabsorption; acute phase reaction or reactant; amebic... |
| ARIMA | autoregressive integrated moving average |
| ARL | Association of Research Libraries; average remaining lifetime |
| AV | Adriamycin and vincristine; air velocity; allergic vasculitis; anteroventral; anteversion; anticipat... |