| RAI | radioactive iodine; radioactive isotope; resident assessment instrument; resting ankle index; right ... |
|---|---|
| RAN | resident's admission notes |
| RAP | recurrent abdominal pain; regression-associated protein; renal artery pressure; resident assessment ... |
| res | research; resection; resident; residue; resistance |
| RFA | resident functional atlas; right femoral artery; right frontoanterior [fetal position] |