| LLQ | left lower quadrant; low-level question |
|---|---|
| LOC | laxative of choice; level of consciousness; liquid organic compound; locus of control; loss of consc... |
| LOI | level of incompetence; limit of impurities |
| L1TC | level 1 trauma center |
| MBL | Marine Biological Laboratory; menstrual blood loss; minimum bactericidal level |