| M.E.S. | Maximal Electroshock Seizure |
|---|---|
| M.f. | Micropolyspora faeni |
| M.F. | mitogenic factor |
| M.G. | Monoclonal gammopathies |
| M.g. | Mycoplasma gallisepticum |
| M.H.Q. | Middlesex Hospital Questionnaire |
| M.I. | Mitotic Index |
| M.I.T. | Massachusetts Institute of Technology |
| M.L.C. | metastatic liver cancer |
| M.L.N.S. | Mucocutaneous Lymph Node Syndrome |