Q
| quadri- | four |
R
| rachi/o | spine |
| radi/o | radiation, x-ray; radius (lower arm bone on thumb side) |
| radicul/o | nerve root |
| rect/o | rectum |
| ren/o | kidney |
| reticul/o | net, mesh |
| retin/o | retina |
| retro- | backward, behind |
| rhabd/o | rod-shaped (striated) |
| rhabdomy/o | rod-shaped (striated) muscle |
| rhin/o | nose |
| rhytid/o | wrinkle |
| roentgen/o | x-rays |
| -rrhage | bursting forth (of ) |
| -rrhagia | bursting forth (of ) |
| -rrhaphy | suture |
| -rrhea | discharge, flow |
| -rrhexis | rupture |
| -rrhythm/o | rhythm |
| rube/o | red |
