| PSAD | prostate-specific antigen density |
|---|---|
| SA | salicylic acid; saline [solution]; salt added; sarcoidosis; sarcoma; scalenus anticus; secondary ame... |
| SSA | salicylsalicylic acid; sicca syndrome A; skin-sensitizing antibody; skin sympathetic activity; Sjogr... |
| SSEA | stage-specific embryonic antigen |
| Sxs | serological sex-specific [antigen] |