| SHD | sudden heart death |
|---|---|
| SIDS | sudden infant death syndrome; sulfo-iduronate sulfatase |
| SMEDI | stillbirth-mummification, embryonic death, infertility [syndrome] |
| SSD | shaded surface display; single saturating dose; Social Security disability; source-skin distance; so... |
| SSIDS | sibling of sudden infant death syndrome [victim] |