| Abbreviation | Definition |
|---|---|
| SLC | Short Leg Cast |
| SLE | St. Louis Encephalitis |
| SLE | Systolic Linear Exponentiator |
| SLED | Slightly Liquid Earthy Dimentia |
| SLEEP | Stress Level Elimination Exercise Plan |
| SLI | Sporadic Language Impairment |
| SLIP | Silent Language Information Processing |
| SLL | S Leucomaenis Leucomaenis |
| SLMV | Synaptic-Like Micro-Vesicle |
| SLN | Sentinel Lymph Node |
| SLN | Superior Laryngeal Nerve |
| SLR | Straight Leg Raising |
| SLS | Severed Life Support |
| SLS | Short Leg Splint |
| SLS | Stagnant Loop Syndrome |
| SLS | Stein-Leventhal Syndrome |
| SLT | Slight |
| SLUDGE | Salivation Lacrimation Urination Defecation Gastrointestinal distress Emesis |
| SLUDGE | Salivation Lacrimation Urination Defecation Gastrointestinal distress Emesis (descriptions of the parasympathetic nervous system) |
| SLWC | Short leg walking cast |