| MR | Maddox rods; magnetic resistance; magnetic resonance; mandibular reflex; mannose-resistant; may repe... |
|---|---|
| MRVP | mean right ventricular pressure; methyl red, Voges-Proskauer [medium] |
| NRbc | nucleated red blood cell |
| NZR | New Zealand red [rabbit] |
| ORBC | ox red blood cell |