[{"Bold_text": "noun", "List Items": ["Geometry.a surface or solid bounded by two parallel planes and generated by a straight line moving parallel to the given planes and tracing a curve bounded by the planes and lying in a plane perpendicular or oblique to the given planes.", "any cylinderlike object or part, whether solid or hollow.", "the rotating part of a revolver, containing the chambers for the cartridges.", "(in a pump) a cylindrical chamber in which a piston slides to move or compress a fluid.", "(in an engine) a cylindrical chamber in which the pressure of a gas or liquid moves a sliding piston.", "(in certain printing presses)a rotating cylinder that produces the impression and under which a flat form to be printed from passes.either of two cylinders, one carrying a curved form or plate to be printed from, that rotate against each other in opposite directions.", "a rotating cylinder that produces the impression and under which a flat form to be printed from passes.", "either of two cylinders, one carrying a curved form or plate to be printed from, that rotate against each other in opposite directions.", "(in certain locks) a cylindrical device for retaining the bolt until tumblers have been pushed out of its way.", "(in a screw or cylindrical gear) an imaginary cylindrical form, concentric to the axis, defining the pitch or the inner or outer ends of the threads or teeth.", "Computers.the tracks of a magnetic disk that are accessible from a single radial position of the access mechanism.", "Textiles.the main roller on a carding machine, especially the roller covered with card clothing that works in combination with the worker and stripper rollers in carding fibers.", "Archaeology.a cylindrical or somewhat barrel-shaped stone or clay object bearing a cuneiform inscription or a carved design, worn by the Babylonians, Assyrians, and kindred peoples as a seal and amulet."]}, {"Bold_text": "verb (used with object)", "List Items": ["to furnish with a cylinder or cylinders.", "to subject to the action of a cylinder or cylinders."]}]