HPPD
| Acronym | Definition |
|---|---|
| HPPD | Hallucinogen Persisting Perception Disorder |
| HPPD | Hours per Patient Day (nursing) |
| HPPD | Hydroxyphenyl Pyruvate Dioxygenase (biochemistry) |
| HPPD | High Power Proton Decoupling (physics) |
| HPPD | Hypersonic Plasma Particle Deposition |
| HPPD | Hyde Park Police Department (Hyde Park, NY) |