Medical Terminology Letter R
| TERM | MEANING |
| rachi/o | spine |
| radicul/o | nerve root |
| radi/o | x-ray, radiation |
| ram/i | branch |
| re- | back, again |
| -receptor, -ceptor | receiver |
| rect/o | rectum |
| reflex/o, reflect/o | to bend back |
| registrat/o | recording |
| relaps/o | to slide back |
| ren/o | kidney |
| respir/o, respirat/o | breathe, breathing |
| resuscit/o | revive |
| reticul/o | netlike |
| retin/o | retina |
| retract/o | drawing back |
| rhabd/o | rod |
| rhabdomy/o | striated/skeletal muscle |
| rhe/o | flow, current, stream |
| rhin/o | nose |
| rhiz/o | root |
| rhod/o | red, rosy |
| rhytid/o | wrinkle |
| rose/o | rosy |
| rot/o, rotat/o | turn, revolve |
| -rrhagia, -rrhage | excessive flow, profuse fluid discharge |
| -rrhaphy | suture |
| -rrhea | flow, discharge |
| -rrhexis | rupture |
| rrhythm/o | rhythm |
| -rubr/o, rubr/i | red |
