| Acronym | Definition |
|---|
| PCIO➣Philadelphia College and Infirmary of Osteopathy (est. 1899; Philadelphia, PA) |
| PCIO➣Prophylactic Cranial Irradiation Overview |
| PCIO➣Provincial Criminal Investigations Officer (Kenya) |
| PCIO➣Program Controlled Input/Output |
| PCIO➣Plasma Clearance of Iohexol (veterinary research) |