cylinder.
A surface created by projecting a closed two-dimensional curve along an axis intersecting the plane of the curve.
Meaning & usage
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 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.
Where this word comes from
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.
To calender; to press (paper, etc.) between rollers to make it glossy.
Where this word comes from
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.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.