| PENK | Pro-enkephalin |
|---|---|
| PEO | Poly(ethylene oxide |
| PEO | Progressive external ophthalmoplegia |
| PEP | 1/pre-ejection period |
| PEP | 2-phosphoenolpyruvate |
| PEP | Pepleomycin |
| PEP | Polyestradiol phosphate |
| PEP | Positive Expiratory Pressure |
| PEP | Post-exposure prophylaxis |
| PEP | Primer extension preamplification |