| PBO | penicillin in beeswax and oil; placebo |
|---|---|
| PBP | penicillin-binding protein; porphyrin biosynthesis pathway; prostate-binding protein; pseudobulbar p... |
| PC | avoirdupois weight [Lat. pondus civile]; packed cells; paper chromatography; paracortex; parent cell... |
| PCN | penicillin; primary care nursing |
| Pen | penicillin |