| Abbreviation | Definition |
|---|---|
| SMS | Simvastatin Multicenter Study |
| SMS | Socioeconomic Monitoring System |
| SMS | solitary myofibroma of skin |
| SMS | somatomedins |
| SMS | Specialties Matching Service |
| SMS | sphingomyelin synthase |
| SMS | stiff man syndrome |
| SN | saphenous nerve |
| SN | sciatic nerve |
| SN | scrub nurse |
| SN | sebaceous nevus |
| SN | second neoplasm |
| SN | sensorineural |
| SN | sensory neurone |
| SN | sentinel (lymph) node |
| SN | seronegative |
| SN | serum neutralisation |
| SN | silver nitrate |
| SN | Sin Nombre |
| SN | sinus node |