| M2 | dose per square meter of body surface; marked dullness; promyelocyte |
|---|---|
| MB | Bachelor of Medicine [Lat. Medicinae Baccalaureus]; buccal margin; isoenzyme of creatine kinase cont... |
| MCB | membranous cytoplasmic body |
| MFB | medial forebrain bundle; metallic foreign body |
| MGB | medial geniculate body; myoglobin |