| Abbreviation | Definition |
|---|---|
| PDAP | Physics Detectors Advisory Panel |
| PDC | Pulsating Direct Current |
| PDE | Possible Duplicate Emission |
| PDI | Percent Depth Ionization |
| PDL | Polarization Dependent Loss |
| PDMR | Photocurrent-Detected Magnetic Resonance |
| PDOS | phononic density of states |
| PDPL | Photonic Device Physics Laboratory |
| PDRP | Physics Directed Reading Program |
| PDS | Power Density Spectra |
| PDSF | Physics Detector Simulation Facility |
| PDSH | Pressure Differential Switch High |
| PDYU | Physics Department, Yarmouk University |
| PE | Positron Emission |
| PE | Potential Energy |
| PEC | Perfect Electrical Conductor |
| PECS | Physics of Estuaries and Coastal Seas |
| PEEP | Physics Ethics Education Project |
| PEL | Particle Emission Level |
| PEL | Permissible Exposure Limit |