| MHR | major histocompatibility region; malignant hyperthermia resistance; maternal heart rate; maximal hea... |
|---|---|
| MR | Maddox rods; magnetic resistance; magnetic resonance; mandibular reflex; mannose-resistant; may repe... |
| HbMet | methemoglobin |
| HiHb | hemiglobin (methemoglobin) |
| Met-Hb | methemoglobin |