| Abbreviation | Definition |
|---|---|
| MMR | myocardial metabolic rate |
| MMSAC | Medical Manpower Standing Advisory Committee |
| MMSL | Medicines Management Safety Lead |
| MNC | Modernising Nursing Careers |
| MNC | mononuclear cells |
| MNC | multinucleated cells |
| MNGIE | mitochondrial neurogastrointestinal encephalopathy |
| MO | mesial occlusal |
| MO | morbid obesity |
| MO | morphine |
| MO | myositis ossificans |
| MoD | maturity-onset diabetes |
| MoD | mean optical density |
| MoD | medic on duty |
| MoD | medical officer of day |
| MoD | mesio-occlusodistal |
| MoD | mode of death |
| MoD | multiorgan donors |
| MoD | multiple organ dysfunction |
| MOEH | Medical Officer for Environmental Health |