| Abbreviation | Definition |
|---|---|
| RR | Rest and Relaxation |
| RRC | Residency Review Committee of ABEM |
| RRC | Respiratory Rhythmicity Centers |
| RRCT | Regular rate, clear tones |
| RRD | Removal of Rigid Dressing |
| RREP | Respiratory Related Evoked Potential |
| RRMS | Relapsing remitting multiple sclerosis |
| RROM | Resistive Range of Motion |
| RRR | Regular rate and rhythm |
| RRU | Rehabilitation Review Unit |
| RS | Reclassification Sensitivity |
| RS | Reducing Sugar |
| RS | Relative Supply |
| RS | Respiratory System |
| RS | Response Shock |
| RS | Right Side |
| RSA | Reactive Secondary Amyloidosis |
| RSA | Recurrent Spontaneous Abortion |
| RSA | Respiratory Sinus Arrhythmia |
| RSA | Right Subclavian Artery |