| SCD | scleroderma; service-connected disability; sickle-cell disease; spinocerebellar degeneration; subacu... |
|---|---|
| SD | Sandhoff disease; senile dementia; septal defect; serologically defined; serologically detectable; s... |
| SDF | slow death factor; stress distribution factor |
| SDHD | sudden death heart disease |
| SDIHD | sudden death ischemic heart disease |