| Term | Definition |
| monomania | excessive concentration on one idea or subject |
| monotonous | continuing in an unchanging tone; wearying |
| polygon | closed plane figure having, literally, many angles and therefore many sides |
| appendectomy | surgical removal of the appendix |
| dichotomy | cutting or division into two; division |
| gastrectomy | surgical removal of part or all of the stomach |
| phlebotomy | opening of a vein to diminish the blood supply |
| tonsillectomy | surgical removal of the tonsils |
| tracheotomy | surgical operation of cutting into the trachea |
| arthropod | invertebrate (animal having no backbone) with jointed legs |