| A | B |
|---|
| pre- | before in time or place (prenatal) |
| pro- | before in time or place (prophase) |
| proct- | anus (proctology) |
| pseudo- | false (pseudostratified) |
| psycho- | mental (psychology) |
| pyo- | pus (pyorrhea) |
| quad- | fourfold (quadriceps femoris) |
| re- | back, again (repolarization) |
| rect- | straight (rectus abdominus) |
| ren- | kidney (renal) |
| rete- | network (rete testis) |
| retro- | backward, behind (retroperitoneal) |
| rhin- | nose (rhinitis) |
| -rrhagia | excessive flow (menorrhagia) |
| -rrhea | flow or discharge (diarrhea) |
| sanguin- | blood (sanguineous) |
| sarc- | flesh (sarcoma) |
| -scope | instrument (stethoscope) |
| -sect | cut (dissect) |
| semi- | half (semilunar) |
| -sis | process or action (dialysis) |
| steno- | arrow (stenosis) |
| -stomy | surgical opening (tracheostomy) |
| sub- | under, below (subcutaneous) |
| super- | above, upper (superfacial) |
| supra- | above, over (suprarenal) |
| syn- (sym-) | together, joined, with (synapse) |
| tachy- | swift, rapid (tachycardia) |
| tele- | far (teleencephalon) |
| tens- | stretch (tensor tympani) |
| tetra- | four (tetrad) |
| therm- | heat (themogram) |
| thorac- | chest (thoracic cavity) |
| thrombo- | lump, clot (thrombocyte) |
| -tomy | cut (appendectomy) |
| tox- | posion (toxemia) |
| tract- | draw, drag (traction) |
| trans- | across, over (transfuse) |
| tri- | three (tigone) |
| trich- | hair (trichology) |
| -trophy | nutritional state (hypertrophy) |
| -tropic | turning to, changing (gonadotropic) |
