| Abbreviation | Definition |
|---|---|
| Mn | Manganese |
| MN | Meson Nucleon |
| MNAN | Methyl-n-amylnitrosamine |
| MNBA | Methyl Nitroso Butyric Acid |
| MNK | Methyl Nonyl Ketone |
| MNO | Manganese Oxide |
| MNOP | Mono N- Octyl Phthalate |
| MO | Metal Oxide |
| MO | Micheal Obaras |
| MO | Modifier Oxide |
| MO | Molecular Orbital |
| MO | Molecular Oriented |
| Mo | Molybdenum |
| MOA | Method of Anlaysis |
| MOAH | Mineral Oil Aromatic Hydrocarbon |
| MOAT | Mother Of All Tests |
| MOAT | Multispecific Organic Anion Transporter |
| MOCA | Mechanical Obstruction And Chemical Ablation |
| MOCR | Modern Organic Chemistry Research |
| MODERNA | Modifying, Derrick, Ribo Nucleic Acid |