| Abbreviation | Definition |
|---|---|
| RB | RetinoBlastoma |
| RB | Right Brain |
| RBBR | Right Bundle Branch Block |
| RBC | Red Blood Cell (count) |
| RBD | Receptor Binding Domain |
| RBD | REM Behavior Disorder |
| RBE | Relative Biological Effects |
| RBF | Rat-Bite Fever |
| RBF | Renal Blood Flow |
| RBF | Resting B*tch Face |
| RBGU | Regional Brain Glucose Utilization |
| RBM | Roll Back Malaria |
| RBU | Rehabilitation Bedservice Unit |
| RC | Rebound and Compression |
| RC | Respiratory Congestion |
| RCA | Right Coronary Artery |
| RCD | Rabbit Calici Disease |
| RCDS | Reynolds Child Depression Scale |
| RCE | Recurrent Corneal Erosion |
| RCK | Regulates Conduction of Potassium (K = Potassium) |