| SIS | semantic indexing system; serotinin irritation syndrome; simian sarcoma; simulator-induced syndrome;... |
|---|---|
| SIWIP | self-induced water intoxication and psychosis |
| SIWIS | self-induced water intoxication and schizophrenic disorders |
| SPIH | superimposed pregnancy-induced hypertension |
| TIA | transient ischemic attack; tumor-induced angiogenesis; turbidimetric immunoassay |