| RANA | rheumatoid arthritis nuclear antigen |
|---|---|
| rANP | rat atrial natriuretic peptide |
| RAO | right anterior oblique |
| RaONC | radiation oncology |
| RAP | recurrent abdominal pain; regression-associated protein; renal artery pressure; resident assessment protocol; rheumatoid arthritis precipitin; right atrial pressure |
| RAPD | Relative Afferent Pupillary Defect |
| RAPD | relative afferent pupillary defect |
| RAPK | reticulate acropigmentation of Kitamura |
| RAPM | refractory anemia with partial myeloblastosis |
| RAPO | rabbit antibody to pig ovary |