CYLINDER

noun see: wheel Date: 1570 1. the surface traced by a straight line moving parallel to a fixed straight line and intersecting a fixed planar closed curve, a solid or surface bounded by a ~ and two parallel planes cutting all its elements, a cylindrical body or space: as, the turning chambered breech of a revolver, b. the piston chamber in an engine, a chamber in a pump from which the piston expels the fluid, any of various rotating members in a press (as a printing press), a cylindrical clay object inscribed with cuneiform inscriptions, ~ed adjective