| MGR | modified gain ratio; multiple gas rebreathing |
|---|---|
| MIMR | minimal inhibitor mole ratio |
| M/L | monocyte/lymphocyte [ratio] |
| MR | Maddox rods; magnetic resistance; magnetic resonance; mandibular reflex; mannose-resistant; may repe... |
| MTR | magnetization transfer ratio; Meinicke turbidity reaction; 5-methylthioribose; methyltetrahydrofolat... |