| MRX | Magneto-Resistive Extended | 磁阻扩展 |
| MRX | Mental Retardation, X-Linked | 智力低下，X连锁 |
| MRX | Magnetic Resonance, Soft Spectrum Coupled X-Ray Laser | 磁共振、软谱耦合X射线激光器 |
| MRX | Medicis Pharmaceutical Corporation | Medicis制药公司 |
| MRX | Mister X | X先生 |
| MRX | Magnetic Reconnection Experiment | 磁重新连接实验 |
| MRX | Mission Rehearsal Exercise (US DoD) | 任务演练（美国国防部） |