| NFD | neurofibrillary degeneration |
|---|---|
| OPCD | olivopontocerebellar degeneration |
| PCD | pacer-cardioverter-defibrillator; papillary collecting duct; paraneoplastic cerebellar degeneration;... |
| PRD | partial reaction of degeneration; physician relations department; postradiation dysplasia |
| RDS | Raskin Depression Scale; respiratory distress syndrome; reticuloendothelial depressing substance; rh... |