| Abbreviation | Definition |
|---|---|
| MPI | Magnetic Particle Inspection |
| MPLA | Modern Physics Letters A |
| MPLB | Modern Physics Letters B |
| MPMS | Magnetic Property Measurement System |
| MPN | Most Probable Number |
| mppcf | Million particles per cubic foot |
| MPS | Maximum Permissible Speed |
| MPSD | Max Planck Institute for the Structure and Dynamics of Matter |
| MPTSP | Maths and Physics Teacher Supply Package |
| MQF | Multiple Quantum Filtered |
| MQFS | Multiple Quantum Filtered Spectra |
| MQT | Macroscopic Quantum Tunneling |
| MR | Magneto Rheological |
| MR | Maximal Reachable |
| MR | Minimal Relativity |
| MRA | Magnetic Resonance Analyzer |
| MRC | Minimal Remanent Change |
| MRF | Magneto-Rheological Fluid |
| MRFM | magnetic resonance force microscopy |
| MRI | magnetic resonance imaging |