| Abbreviation | Definition |
|---|---|
| RVQ | Relaxed Vaginal Outlet |
| RVR | Rapid Ventricular Response |
| RVS | Random Vomiting Syndrome |
| RVSP | Right Ventricular Systolic Pressure |
| RVT | Renal Vein Thrombosis |
| RVTD | Right Ventricular Transverse Diameter |
| RVV | Russell's Viper Venom |
| RVVC | Recurrent VulvoVaginal Candidiasis |
| RVZ | Raad voor de Volksgezondheid en Zorg - Netherlands |
| RWI | Recreational Water Illness |
| RWMA | Regional Wall Motion Abnormality |
| RX | Right |
| RXN | Reaction |
| RXR | Retinoid X Receptor |
| RXZ | Arginine Alanine Proline proteins |
| RYT | Reflexology Yoga Therapy |
| S | Sensory |
| S | Sick |
| S | Sinister |
| S | Sleep |