| Abbreviation | Definition |
|---|---|
| MFPG | Mixed Fission Products Generator |
| MFPL | MAP (Multiple Application Platform) Fabry-Perot Laser |
| MFR | Mass Flow Rate |
| MFR | Maximum Field Radius |
| MFT | Mean Field Theory |
| MGLT | Micro-Gravity Linear acceleration Tolerance |
| MGNR | Modified Global Newton Raphson |
| MGNS | Mercury Gamma and Neutron Spectrometer |
| MHP | Health Physics |
| MIC | Measuring Ionization Chamber |
| MIC | Microbial Influenced Corrosion |
| MICE | Muon Ionisation Cooling Experiment |
| MIFP | Mediterranean Institute of Fundamental Physics |
| MIKES | Mass-Analyzed Ion Kinetic-Energy Spectrometry |
| MIP | Minimum Ionizing Particle |
| MIPT | Medical Imaging Physics and Technology |
| MIPT | Moscow Institute Of Physics And Technology |
| MIR | 1) Mir. .'me'; Deutsch. 2) Maximum incremental reactivity in 'foot pounds' |
| MIS | Mirror Image Stimulation |
| MITP | Mainz Institute for Theoretical Physics |