| SDC | serum digoxin concentration; Smith delay compensator; sodium deoxycholate; subacute combined degener... |
|---|---|
| SDSEM | spinocerebellar degeneration-slow eye movements [syndrome] |
| SMCD | senile macular choroidal degeneration; systemic mast cell disease; systemic meningococcal disease |
| SMD | senile macular degeneration; spondylometaphyseal dysplasia; submanubrial dullness |
| SND | sinus node dysfunction; striatonigral degeneration |