| POP | diphosphate group; pain on palpation; paroxypropione; persistent occipitoposterior [fetal position];... |
|---|---|
| PP | diphosphate group; emphysema [pink puffers]; near point of accommodation [Lat. punctum proximum]; pa... |
| PPRP | polyadenosine diphosphate-ribose polymerase |
| TDP | thermal death point; thoracic duct pressure; thymidine diphosphate; total degradation products |
| UD | ulcerative dermatosis; ulnar deviation; undetermined; underdeveloped; unit dose; urethral dilatation... |