| 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 |
| RED | radiation experience data; rapid erythrocyte degeneration |