| RDS | Raskin Depression Scale; respiratory distress syndrome; reticuloendothelial depressing substance; rh... |
|---|---|
| RED | radiation experience data; rapid erythrocyte degeneration |
| SACD | subacute combined degeneration |
| SDC | serum digoxin concentration; Smith delay compensator; sodium deoxycholate; subacute combined degener... |
| SDSEM | spinocerebellar degeneration-slow eye movements [syndrome] |