| ROP | removal of pins or plates; removal of plaster [of Paris]; retinopathy of prematurity; right occipito... |
|---|---|
| ROT | real oxygen transport; remedial occupational therapy; right occipito-transverse [fetal position] |
| RSA | rabbit serum albumin; regular spiking activity; relative specific activity; relative standard accura... |
| RScA | right scapuloanterior [fetal position] |
| RScP | right scapuloposterior [fetal position] |