| MRSI | Microstrip Rectangular Spiral Inductor | 微带矩形螺旋电感 |
| MRSI | Multiple Round Simultaneous Impact | 多轮同时冲击 |
| MRSI | Magnetic Resonance Spectroscopic Imaging | 磁共振光谱成像 |
| MRSI | Micro Robotics Systems Incorporated | 微型机器人系统公司 |
| MRSI | Mobilization Requirements, Secondary Items | 进场要求，次要项目 |
| MRSI | Materials Research Society Of India | 印度材料研究学会 |