| MR | Maddox rods; magnetic resistance; magnetic resonance; mandibular reflex; mannose-resistant; may repe... |
|---|---|
| MRP | mean resisting potential; medical reimbursement plan; multidrug resistance-associated protein |
| MVR | massive vitreous reaction; microvitreoretinal; minimal vascular resistance; mitral valve replacement... |
| NAR | nasal airway resistance; National Association for Retarded [Children, Citizens]; no action required |
| nIR | non-insulin-resistance |