- Magnetic Resonance Imaging (MRI)
- Manifold
- Mass Spectrometry (MS)
- Material Safety Data Sheet (MSDS - SDS)
- Maximum operating pressure
- Measurement
- Measurement accuracy
- Measurement error
- Measurement precision
- Melting point
- Metrology
- Micron
- Minor component
- Mixture
- Modified Atmosphere Packaging (MAP)
- Mole
- Molecular weight