Cylinder

Cylinder most commonly refers to:

• Cylinder (geometry), a three-dimensional geometric figure

Cylinder may also refer to:

Science and technology

• Cylinder (engine), the space in which a piston travels in an engine
• Gas cylinder, a container for storing compressed gas
• Cylinder (firearms), the rotating device that contains the firing chambers of a revolver
• Cylinder lock, the part that is profiled to accept a specific key

Information storage

• Phonograph cylinder, the dominant medium of audio storage from the 1870s to the 1910s
• Cylinder (disk drive), in computer hard drives
• Cylinder seal, an ancient, often clay, cylinder engraved with a 'picture story'
• Cuneiform scripts, on cylinders, e.g. ancient documents of Babylonian kings:
  • Cylinder of Nabonidus
  • Cyrus Cylinder

Mathematics

• Cylinder (algebra), the Cartesian product of a set with its superset

Places

• Cylinder, Iowa, a U.S. city

See also

• Hydraulic cylinder, using pressurized liquid
• Pneumatic cylinder, using compressed gas
  • Cylinder (locomotive), in a steam locomotive
• Graduated cylinder, glassware for measurement of liquids in laboratories
• Cylinder set, the natural open set of a product topology.
• Cylinder hat, popular in 19th and early 20th centuries
• Cylindrical lens, a type of lens
• Diving cylinder, a type of gas cylinder used in scuba-diving
• Cylindrical error, a form of refractive error
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