| SGML | standard generalized markup language [of ISO] |
|---|---|
| SGTT | standard glucose tolerance test |
| SH | Salter-Harris [fracture]; Schonlein-Henoch [purpura]; self-help; serum hepatitis; sexual harassment;... |
| SIC | serum insulin concentration; Standard Industrial Classification |
| s | Greek lower case letter sigma; conductivity; cross section; millisecond; molecular type or bond; pop... |