| RMH | Ronald Mcdonald House | |
| RMH | Rocky Mountain House | |
| RMH | Right Male Hand | |
| RMH | Rolf Matthias Herklotz | |
| RMH | Rocky Mountain Herbarium Floristic Research, University of Wyoming | |
| RMH-AA | Ronald McDonald House of Ann Arbor | |
| RMHB | Regional Mental Health Boards | |
| RMHB | Razor Mountain Heritage Breeds | |
| RMHC | Ronald McDonald House Charities | |
| RMHCI | Registered Mental Health Counselor Intern | |
| RMHK | Reconnaissance Modular Helmet Kit | |
| RMHT | Registered Mental Health Therapist | |
| RMHT | Regional Mental Health Teams | |
| RMHT | R M H Teleservices, Inc. | |
| RMHT | Raza Mexicana Hackers Team | |
| RMHT | Reversible Metal Hydride Thermochemical | |
| RMHT | Ronald McDonald House of Toronto | |
| RMHT | Rocky Mountain Holiday Tours | |
| RMI | Rimini, Italy | |
| RMI | Rotonics Manufacturing, Inc. | |
| RMI | Resource Mining Corporation Ltd | |
| RMI | recent myocardial infarction | |
| RMI | reperfused myocardial infarction | |
| RMI | Resource Management Initiative | |
| RMI | Risk of Malignancy Index |
