cylinder

noun

central working part of a reciprocating engine or pump, the space in which a piston travels, often equipped with a cylinder liner
surface formed by the points at a fixed distance from a given straight line called the axis of the cylinder; one of the most basic curvilinear geometric shapes

Wiktionary

Pronunciation: /ˈsɪlɪndə(ɹ)/ / /ˈsɪləndɚ/ / [ˈsɪlɪ̈ndɚ]

noun

Etymology: From Middle French chilindre, cylindre, from Latin cylindrus, from Ancient Greek κύλινδρος (kúlindros), from κυλίνδω (kulíndō) "I roll or wallow" (intransitive). Doublet of calander and calender.

A surface created by projecting a closed two-dimensional curve along an axis intersecting the plane of the curve.
“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.”
A solid figure bounded by a cylinder and two parallel planes intersecting the cylinder.
Any object in the form of a circular cylinder.
“A big greyish rounded bulk, the size, perhaps, of a bear, was rising slowly and painfully out of the cylinder.”
A cylindrical cavity or chamber in a mechanism, such as the counterpart to a piston found in a piston-driven engine.
The space in which a piston travels inside a reciprocating engine or pump.
A container in the form of a cylinder with rounded ends for storing pressurized gas; a gas cylinder.
An early form of phonograph recording, made on a wax cylinder.
The part of a revolver that contains chambers for the cartridges.
The corresponding tracks on a vertical arrangement of disks in a disk drive considered as a unit of data capacity.

verb

To calender; to press (paper, etc.) between rollers to make it glossy.