| Acronym | Definition |
|---|
| MRTB➣Medical Radiation Technologists Board (est. 2003; Wellington, New Zealand) |
| MRTB➣Multidrug-Resistant Tuberculosis |
| MRTB➣Metallic Return Transfer Breaker (electrical energy) |
| MRTB➣Multi-function Radar Transponder Beacon |
| MRTB➣Medium Range Thermal Binocular |