| SLI | segment length, inferior |
|---|---|
| SLL | segment length, lateral |
| SLS | segment long-spacing; short-leg splint; single limb support; Sjogren-Larsson syndrome; stagnant loop... |
| SLS | segment length, septal |
| TIS | tetracycline-induced steatosis; transdermal infusion system; triage illness scale; trypsin-insoluble... |