| LIS | laboratory information system; lateral intercellular space; left intercostal space; library informat... |
|---|---|
| LISS | low-ionic-strength saline |
| LR | labeled release; laboratory references; laboratory report; labor room; lactated Ringer [solution]; l... |
| AAR | active avoidance reaction; acute articular rheumatism; antigen-antiglobulin reaction |
| APR | abdominoperineal resection; absolute proximal reabsorption; acute phase reaction or reactant; amebic... |