Caliper (noun)

1. An instrument used to measure the distance between two opposite sides of an object.
2. A tool consisting of two hinged legs, used to measure the dimensions or the form of an object, such as the thickness of a sheet of metal or the diameter of a pipe.

Origin:

From middle english calipere, from old french calipere, from latin caliper ("a pair of compasses"), from calx ("hee.l")

Examples:

1. The caliper was used to measure the thickness of the metal.
2. He used the caliper to measure the diameter of the pipe.
3. A caliper is an essential tool for measuring thicknesses, diameters and other dimensions.
4. A vernier caliper is a measuring tool that can measure very small distances with high precision.
5. Caliper can be used to measure the distance between two points on a workpiece.