| RO | radiation oncology; radiation output; ratio of; relative odds; renal osteodystrophy; reverse osmosis; Ritter-Oleson [technique]; routine order; rule out |
|---|---|
| ro | radius of orifice |
| RO | PACS radiation oncology picture archiving and communication system |
| ROA | Right Occipito-Anterior |
| ROA | right occipitoanterior [fetal position] |
| ROAD | reversible obstructive airways disease |
| ROAT | repeat open application test |
| ROATS | rabbit ovarian antitumor serum |
| rob | robertsonian translocation |
| ROC | Receptor Operated Channel |