An instrument, usually resembling a pair of dividers or compasses with curved legs, for measuring the diameter or thickness of bodies, as of work shaped in a lathe or planer, timber, masts, shot, etc.; or the bore of firearms, tubes, etc.; -- called also caliper compasses, or caliber compasses.

A measuring device consisting of a pair of moveable, curved legs fastened at one end with a screw or rivet, used to measure the diameter or thickness of an object (Nauert 1979).

A tool used to measure the diameter of round forms, for example calipers are used to get lids to fit just right. Centering - Technique to move the clay in to a symmetrical rotating axis in the middle of a wheel head so you can throw it. Chuck - A piece used to aid the potter in trimming. A chuck is a form that can hold a pot upside-down above the wheel head while the potter trims it. Chucks are thrown and bisque fired clay cylinders which are open on both sides.

The clamp mounted on disc brakes that hold the brake pads and presses them against the disc to stop or slow the car.