| AR | absolute risk; accounts receivable; achievement ratio; actinic reticuloid [syndrome]; active resista... |
|---|---|
| MR | Maddox rods; magnetic resistance; magnetic resonance; mandibular reflex; mannose-resistant; may repe... |
| regurg | regurgitation |
| TR | recovery time; rectal temperature; repetition time; residual tuberculin; terminal repeat; tetrazoliu... |