| pr | far point of accommodation [Lat. punctum remotum]; pair; per rectum; prism |
|---|---|
| PSAP | primary public safety answering point; prosaposin; pulmonary surfactant apoprotein |
| PSF | peak scatter factor; peptide supply factor; point spread function; pseudosarcomatous fasciitis |
| pt | part; patient; pint; point |
| Rf | in paper or thin-layer chromatography, the distance that a spot of a substance has moved from the po... |