| Abbreviation | Definition |
|---|---|
| M | molar |
| M | Molecular |
| M2O | Nitrogen oxide |
| MAC | Mobile Analytical Chemical |
| MACS | Magnetic Cell Separation |
| MAD | Migration And Dispersal |
| MAD | Multi-wavelength Anomalous Diffraction |
| MADG | MethylArsenic-DiGlutathione |
| MADG | Moisture Activated Dry Granulation |
| MAFC | Magnesium Air Fuel Cell |
| MAFC | Magnesium-Air Fuel Cell |
| MAG | Metal Active Gas |
| MALLS | Multi-Angle Laser Light Scattering |
| MAM | Methyl Azoxy Methanol |
| MAM | MethylAzoxyMethanol |
| MAOA | monoamine oxiidase-A |
| MAOI | Monoamine oxidase inhibitors |
| MASH | Metal Acid Salt Hydrogen |
| MATI | Metrohm Automated Titration |
| MAWC | Microwave assisted wet chemical |