| Acronym | Definition |
|---|
| RHO | Rodgers & Hammerstein Organization |
| RHO | Rhodopsin |
| RHO | Reproductive Health Outlook |
| RHO | Rural Health Office |
| RHO | Right Hand Opponent (bridge game) |
| RHO | Rockwell Hanford Operations |
| RHO | Rhodes, Greece - Paradisi (Airport Code) |
| RHO | Rosemary Hill Observatory (University of Florida) |
| RHO | Redwings Hockey Organization |
| RHO | Railhead Officer |
| RHO | Refueling Hold Order |
| RHO | Ressources Humaines et Organisation (French: Human Resources and Organization) |
| RHO | Relaxation Time in the Rotating Frame (Magnetic Resonance Imaging) |