| Term | Definition |
| cabinet oblique drawing | a form of oblique drawing in which the receding lines are drawn half scale |
| caliper | a measuring instrument having two usually adjustable jaws |
| cavalier oblique drawing | a form of oblique drawing in which the receding lines are drawn full sixe and 45 degrees from horizontal |
| centerline | a line type that is used to indicate the axis of symmerty for a part or feature |
| chamfer | a small angled surface formed between two surfaces |
| circle | the set of all points in a plane at a given distance from a given point in the plane.circu |
| circumscribe | a triangle located round around a polygon, such as a circle |
| counterbore | a cylindrical recess around a hole, usually to receive a bolt head or nut |
| countersink | a conical-shaped recess around a hole, often used to receive a tapered screw |
| cutting plane line | a line drawn on a view where a cut was made in order to define the location of the imaginary section plane. |