| PRD | partial reaction of degeneration; physician relations department; postradiation dysplasia |
|---|---|
| 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... |