cam

cam is a Noun

Definition:

[1] A turning or sliding piece which, by the shape of its periphery or face, or a groove in its surface, imparts variable or intermittent motion to, or receives such motion from, a rod, lever, or block brought into sliding or rolling contact with it.

[2] A curved wedge, movable about an axis, used for forcing or clamping two pieces together.

[3] A projecting part of a wheel or other moving piece so shaped as to give alternate or variable motion to another piece against which its acts.

[4] A ridge or mound of earth. [Prow. Eng.] Wright. Cam wheel (Mach.), a wheel with one or more projections (cams) or depressions upon its periphery or upon its face; one which is set or shaped eccentrically, so that its revolutions impart a varied, reciprocating, or intermittent motion.