| MCH |
Mean cell hemoglobin (average amount of hemoglobin per red cell) |
| MCHC |
Mean cell hemoglobin concentration (average concentration of hemoglobin per red cell) |
| MCV |
Mean cell volume (average volume or size per red cell |
| MDI |
Metered-dose inhaler |
| MEG |
Magnetoencephalography |
| MG |
Myasthenia gravis |
| mg |
Milligram (1/1000 of a gram) |
| mg/dl, mg/dL |
Milligram per deciliter |
| MI |
Myocardial infarction |
| mix astig |
Mixed astigmatism |
| ml, mL |
Milliliters (1/1000 of a liter) |
| mm |
Millimeter (1/1000 of a meter) |
| mm Hg |
Millimeters of mercury |
| MR |
Mitral regurgitation |
| MRA |
Magnetic resonance angiogram; magnetic resonance angiography |
| MRI |
Magnetic resonance imaging |
| MS |
Mitral stenosis; musculoskeletal; multiple sclerosis; mental status; magnesium sulfate |
| MSH |
Melanocyte-stimulating hormone |
| MUGA |
Multiple-gated acquisition (scan) |
| MVP |
Mitral valve prolapse |
| MVR |
Mitral valve replacement; massive vitreous retraction (blade); microvitreoretinal |
| Myop |
Myopia (nearsightedness) |
