| Abbreviation | Definition |
|---|---|
| STS | Sympathetic Therapy System |
| STSG | Split Thickness Skin Graft |
| StT | Spinothalamic Tract |
| SUBACE | Subacetate |
| SUBCU | Subcutaneous |
| SUBQ | Subcutaneous |
| SubQ | Under the Skin |
| SUD | Substance Use Disorder |
| SUD | Sudden Unexpected Death |
| SULFABENZ | Sulvabenzamide |
| SULFACET | Sulfacetamide |
| SUP | Superior |
| SUP | Supination |
| SUP | Supine |
| SUP | Suppository |
| SUPP | Suppository |
| SUPPOS | Suppository |
| SUR | Sulfonylurea Receptor |
| SURG | Surgical |
| SURP | Summer Undergraduate Research in Physiology |