| SIS | semantic indexing system; serotinin irritation syndrome; simian sarcoma; simulator-induced syndrome;... |
|---|---|
| SSB | short spike burst; sicca syndrome B; single-strand break; single-stranded binding [protein]; stereos... |
| SW | seriously wounded; short waves; sinewave; slow wave; soap and water; social worker; spike wave; spir... |
| S/W | spike wave |
| SWS | slow-wave sleep; spike-wave stupor; steroid-wasting syndrome; Sturge-Weber syndrome |