| RWIS | restraint and water immersion stress |
|---|---|
| SIWIP | self-induced water intoxication and psychosis |
| SIWIS | self-induced water intoxication and schizophrenic disorders |
| STPD | a volume of gas at standard temperature and pressure that contains no water vapor |
| SWI | sterile water for injection; stroke work index; surgical wound infection |