| Abbreviation | Definition |
|---|---|
| MOHS | Minerals Of Hardness Scale |
| MRBP | Minimum Requirements for Biological Products |
| MRCV | Mal de Rio Cuarto Virus |
| MSA(s) | microtubule-stabilizing agent(s) |
| MSB | Molecular Systems Biology |
| MSB | Museum of Southwestern Biology |
| MSBP | Multiple Sexual Biological Perversions |
| MSIB | Master of Science in Integrative Biology |
| MSSB | Modeling and Simulation in Systems Biology |
| MSW | Mammal Species of the World |
| MTB | Mouse Tumor Biology |
| MTBI | Mathematical and Theoretical Biology Institute |
| MVB | Marine Vertebrate Biology |
| MVM | Molecular Virology and Microbiology |
| MWFB | Museum of Wildlife and Fish Biology |
| MYHM | MYH1 Myopathy |
| NABT | National Association of Biology Teachers |
| NACB | Nucleic Acid Chemical Biology |
| NBC | Nuclear Biological Containment |
| NBCD | Non Biological Complex Drug |