| MPD | main pancreatic duct; maximum permissible dose; mean population doubling; membrane potential differe... |
|---|---|
| PDL | pancreatic duct ligation; periodontal ligament; poorly differentiated lymphocyte; population doublin... |
| PDT | photodynamic therapy; population doubling time |
| Pop | popliteal; population |
| PP | diphosphate group; emphysema [pink puffers]; near point of accommodation [Lat. punctum proximum]; pa... |