| Abbreviation | Definition |
|---|---|
| PGA | PhosphoGlisaric Acid |
| PGA | PhosphoGlyceric Acid |
| PGA | PolyGlycolic Acid |
| PGAL | Glyceraldehyde 3-phosphate |
| PGE | Platinum Group Elements |
| PGM | Platinum Group Metals |
| PGV | Plasma Gasification and Vitrification |
| PH | Hydrogen ion concentration (pH grade) |
| PH | pH scale ((from potential of Hydrogen) the logarithm of the reciprocal of hydrogen-ion concentration |
| PH | Pondus Hydrogenii |
| PH | Potassium Hydrogen |
| PH | Potential Hydrogen |
| pH | Potential of Hydrogen |
| PH | Power Of Hydrogen |
| PH | Probable Helium |
| PH | Public Health |
| PHA | Poly Hyrdroxy Acid |
| PHB | PolyHydroxyButyrate |
| PHBV | poly(3-hydroxybutyrate-co-3-hydroxyvalerate)(not an acronym) |
| PHBV | Polyhydroxybutyrate-co-valerate |