| POX | point of exit |
|---|---|
| PP | diphosphate group; emphysema [pink puffers]; near point of accommodation [Lat. punctum proximum]; pa... |
| pp | near point of accommodation [Lat. punctum proximum]; postprandial; postpartum |
| PSAP | primary public safety answering point; prosaposin; pulmonary surfactant apoprotein |
| PSF | peak scatter factor; peptide supply factor; point spread function; pseudosarcomatous fasciitis |