| S | Greek capital letter sigma; syphilis; summation of series |
|---|---|
| STORCH | syphilis, toxoplasmosis, rubella, cytomegalovirus, and herpesvirus |
| SY | spectroscopy; syphilis, syphilitic |
| syph | syphilis, syphilitic |
| TORCH | toxoplasmosis, other [congenital syphilis and viruses], rubella, cytomegalovirus, and herpes simplex... |