| 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) |