| SI | International System of Units [Fr. le Systeme International d'Unites]; sacroiliac; saline infusion; ... |
|---|---|
| SIE | stroke in evolution |
| SMR | senior medical resident; sensorimotor rhythm; severe mental retardation; sexual maturity rating; ske... |
| spSHR | stroke-prone spontaneously hypertensive rat |
| St, st | let it stand [Lat. stet]; let them stand [Lat. stent]; stage [of disease]; status; stere; sterile; s... |