| Term | Definition |
| Revolving nosepiece | holds the objectives and can be turned to change from one magnification to another |
| Objective | the lens or system of lenses nearest the object being viewed |
| Clip | any of various small fasteners used to hold loose articles together |
| Condenser | lens used to concentrate light on an object |
| iris diaphragm | diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening |
| mirror | Reflects light to the specimen |
| Eyepiece | combination of lenses at the viewing end of optical instruments |
| Body tube | A part of the miscroscope in which you look through. |
| Course adjustment | gives big adjustments to the lense |
| Fine adjustment | gives small adjustments to the lense |
| Arm | Part that connects the body tube to the base |
| Stage | a small platform on a microscope where the specimen is mounted for examination |
| Condenser control knob | controls movement of the neck |