| Acronym | Definition |
|---|
| PDH | Pyruvate Dehydrogenase Complex (enzymes) |
| PDH | Plesiochronous Digital Hierarchy |
| PDH | Professional Development Hours (continuing education) |
| PDH | Propane Dehydrogenation |
| PDH | Pretty Damn Hot |
| PDH | Private Dwelling House (mortgages) |
| PDH | Pound-Drever-Hall (laser frequency stabilization technique) |
| PDH | Product Data Hub (software) |
| PDH | Plesio-Synchronous Digital Hierarchy |
| PDH | Pairing Diffie Hellman |
| PDH | Performance Data Helper |
| PDH | Procuraduría de los Derechos Humanos |
| PDH | Procuraduria de Derechos Humanos (Spanish) |
| PDH | Performance Data Helper (Microsoft) |
| PDH | Pain Drug Hypnosis |
| PDH | Pennsylvania Department of Health |
| PDH | Probability of Damage given a Hit |
| PDH | Primary Digital Hierarchy |
| PDH | Pump, Domestic Hot Water |
| PDH | Pneumatic Drop Hammer |