| SPI2 | Salmonella Pathogenicity Island 2 |
|---|---|
| SPID | Sum of pain intensity differences |
| SPIEM | Solid phase immune electron microscopy |
| SPIN | Speech Perception in Noise |
| SPIO | Superparamagnetic iron oxide |
| SPK | Simultaneous pancreas-kidney |
| SPK | Simultaneous pancreas/kidney transplant |
| SPK | simultaneous pancreas and kidney |
| SPL | Sound Pressure Level |
| SPL | Spironolactone |