a solid body which may be generated by the rotation of a parallelogram round one its sides; or a body of rollerlike form, of which the longitudinal section is oblong, and the cross section is circular.-the space inclosed by any cylindrical surface. the space may be limited or unlimited in length.-any hollow body of cylindrical form-the chamber of a steam engine in which the piston is moved by the force of steam.-the barrel of an air or other pump.-the revolving platen or bed which produces the impression or carries the type in a cylinder press.-the bore of a gun; the turning chambered breech of a revolver.-the revolving square prism carrying the cards in a jacquard loom.