definition
A surface created by projecting a closed two-dimensional curve along an axis intersecting the plane of the curve.
example
When the two-dimensional curve is a circle, the cylinder is called a circular cylinder. When the axis is perpendicular to the plane of the curve, the cylinder is called a right cylinder. In non-mathematical usage, both right and circular are usually implied.
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A solid figure bounded by a cylinder and two parallel planes intersecting the cylinder.
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Any object in the form of a circular cylinder.
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A cylindrical cavity or chamber in a mechanism, such as the counterpart to a piston found in a piston-driven engine.
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The space in which a piston travels inside a reciprocating engine or pump.
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A container in the form of a cylinder with rounded ends for storing pressurized gas; a gas cylinder.
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An early form of phonograph recording, made on a wax cylinder.
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The part of a revolver that contains chambers for the cartridges.
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The corresponding tracks on a vertical arrangement of disks in a disk drive considered as a unit of data capacity.