| SPI | Self-Perception Inventory; serum precipitable iodine; serum protein index; Shipley Personal Inventory; standardized-patient instructor |
|---|---|
| SPIA | solid-phase immunoabsorption; solid-phase immunoassay |
| SPICU | surgical pulmonary intensive care unit |
| SPID | summed pain intensity difference |
| SPIF | solid-phase immunoassay fluorescence |
| SPIH | superimposed pregnancy-induced hypertension |
| spin | spine, spinal |
| spir | spiral; spirit |