| OPD | obstetric prediabetic; optical path difference; otopalatodigital [syndrome]; outpatient department; ... |
|---|---|
| PED | patient examined by doctor; pediatric emergency department; pink-eyed dilution |
| PRD | partial reaction of degeneration; physician relations department; postradiation dysplasia |
| RD | radial deviation; radiology department; rate difference; Raynaud disease; reaction of degeneration; ... |
| SHHD | Scottish Home and Health Department |