| MR | Maddox rods; magnetic resistance; magnetic resonance; mandibular reflex; mannose-resistant; may repe... |
|---|---|
| MRIF | melanocyte[-stimulating hormone] release-inhibiting factor |
| MRIH | melanocyte[-stimulating hormone] release-inhibiting hormone |
| MRR | marrow release rate; maximum relation rate |
| PIF | paratoid isoelectric focusing variant protein; peak inspiratory flow; proinsulin-free; prolactin-inh... |