| Abbreviation | Definition |
|---|---|
| RMSA | Rashtriya Mahila Shiksha Abhiyan |
| RMSA | Resort Mobile Solutions Alliance |
| RMSA | Retiree Medical Savings Account |
| RMSA | Retirement Medical Savings Account |
| RMSA | Rocky Mountain Soaring Association |
| RMSD | Root Mean Square Deviation |
| RMSD | root mean square deviations |
| RMSD | Root Mean Square Distance |
| RMSD | root mean squared deviation |
| RMSD | root mean squared distance |
| RMSD | Root-Mean-Square Deviation |
| RMSD | Royal Mail Special Delivery |
| RMSE | Root Mean Square Error |
| RMSE | Root Mean Square Errors |
| RMSE | Root Mean Squared Error |
| RMSE | Root Mean Squared Errors |
| RMSEC | Ramon Magsaysay Student Essay Competition |
| RMSEC | Root Mean Square Error of Calibration |
| RMSF | Root Mean Square Fluctuacon |
| RMSF | Root Mean Square Fluctualon |