| Acronym | Meaning |
![](file.png) | PCU | Process Control Unit |
![](file.png) | PCV | Positive Crankcase Ventilation |
![](file.png) | PD | Photoelectron Diffraction |
![](file.png) | PDA | Phase Doppler Analysis |
![](file.png) | PDA | Photodiode Array |
![](file.png) | PDAP | Poly(diallyl Phthalate) |
![](file.png) | PDB | Peedee Belemnite |
![](file.png) | PDB | Protein Data Bank |
![](file.png) | PDB | Potato Dextrose Broth |
![](file.png) | PDCAAS | Protein Digestibility Correlated Amino Acid Score |
![](file.png) | PDDO | Projection Of Diatomic Differential Overlap |
![](file.png) | PDE | Partial Differential Equation |
![](file.png) | PDEA | Preliminary Draft Environmental Assessment |
![](file.png) | PDECD | Pulsed Discharge Electron Capture Detector |
![](file.png) | PDEIS | Preliminary Draft Environmental Impact Statement |
![](file.png) | PDES | Preliminary Draft Environmental Statement |
![](file.png) | PDF | Powder Diffraction File |
![](file.png) | PDF | Pair Distribution Function |
![](file.png) | PDF | Planar Deformation Feature |
![](file.png) | PDF | Probability Density Function |
![](file.png) | PDF | Probability-distribution Function |
![](file.png) | PDFT | Perturbation Density-functional Theory |
![](file.png) | PDG | Patent Documentation Group |
![](file.png) | PDGF | Platelet-derived Growth Factor |
![](file.png) | PDGFR | Platelet-derived Growth Factor Receptor |
![](file.png) | PDI | Point Dipole Interaction (model For Mol.-polarizability Calcns.) |
![](file.png) | PDI | Polarization-division Interferometry |
![](file.png) | PDI | Polydispersity Index |
![](file.png) | PDK | Pyruvate Dehydrogenase Kinase |
![](file.png) | PDLC | Polymer-dispersed Liquid Crystal |
![](file.png) | PDM3.1 | Probabilistic Dilution Model Version 3.1 |
![](file.png) | PDMEE | Primary-beam Diffraction Modulated Electron Emission |
![](file.png) | PDMS | Plasma Desorption Mass Spectrometry |
![](file.png) | PDP | Plasma Display Panel |
![](file.png) | PDPA | Phase Doppler Particle Analyzer |
![](file.png) | PDPID | Pulsed Discharge Photoionization Detector |
![](file.png) | PDQ | Physician Data Query |
![](file.png) | PDR | Photodissociation Region |
![](file.png) | PDR | Photon-dominated Region |
![](file.png) | PDR | Proliferative Diabetic Retinopathy |
![](file.png) | PDRM | Post-depositional Remanent Magnetization |
![](file.png) | PDS | Photothermal Deflection Spectroscopy |
![](file.png) | PDS | Piecewise Direct Standardization |
![](file.png) | PDSA | Peroxydisulfuric Acid |
![](file.png) | PDT | Photodynamic Therapy |
![](file.png) | PDU | Process Development Unit |
![](file.png) | PDVB | Poly(divinyl Benzene) |
![](file.png) | PDVSA | Petroleos De Venezuela |
![](file.png) | PE | Performance Evaluation |
![](file.png) | PE | Population Equivalent (in Wastewater Treatment) |