| Abbreviation | Definition |
|---|---|
| MD | Methyl Di-chloroarsine |
| MD | Molecular Diameter |
| MDA | MethyleneDiAniline |
| MDCM | Mechanistically Defined Chemical Mixtures |
| MDEA | Methyl Diethanolamine |
| MDI | Methylene Diphenyl Diisocyanate |
| MDMA | 3,4-MethyleneDioxyMethAmphetamine |
| MDMA | 3,4-methylenedioxy-N-methylamphetamine |
| MDN | Mercury Deposition Network |
| MDQ | Minimum Daily Quantity |
| MDT | Monomer, Dimer, Tetramer |
| ME | Metal Evaporate |
| MEA | MonoEthanolAmine |
| MEC | Most efficient chemistry |
| MECC | Midwest Enzyme Chemistry Conference |
| MeCHO | Acetaldehyde |
| MEE | Minimum Explosive Energy |
| MEG | MonoEthylene Glycol |
| MEKP | Methyl Ethyl Ketone Peroxide |
| MEP | Methanol Equivalent Productivity |