| LOR | long open reading frame; lorazepam; loricrin; loss of righting reflex |
|---|---|
| LORF | long open reading frame |
| LPHAS | limb/pelvis-hypoplasia/aplasia syndrome |
| LR | labeled release; laboratory references; laboratory report; labor room; lactated Ringer [solution]; l... |
| LU | left upper [limb]; loudness unit; Lupron; lytic unit |