Look up cylinder in Wiktionary, the free dictionary.

Cylinder may refer to:

• in geometry, a three-dimensional geometric shape - see Cylinder (geometry)
• in algebra, the Cartesian product of a set with its superset - see Cartesian product
• in optics:
  • a type of lens
  • a form of refractive error

• a container:
  • a graduated cylinder, glassware for measurement of liquids in laboratories
  • a gas cylinder, a container for storing compressed gas (e.g. compressed air)
    • in particular a diving cylinder, a type of gas cylinder used in scuba-diving

• a device converting pressure into motion:
  • Hydraulic cylinder, a cylinder barrel with piston rod for pushing and pulling using pressurized fluid
  • Pneumatic cylinder, a cylinder barrel with piston rod for pushing and pulling using compressed gases
    • in particular a cylinder (locomotive)
  • the space, in an engine, within which a piston travels - see Cylinder (engine)

• a mechanical part:
  • Cylinder (firearms), the rotating device that contains the firing chambers of a revolver
  • in a lock, the part that is profiled to accept a specific key - see Cylinder lock

• in data storage:
  • Phonograph cylinder, the dominant medium of audio storage from the 1870s to the 1910s
  • in some computer hard drives, a division of data; see cylinder-head-sector and cylinder (disk drive)

• other:
  • Cylinder, Iowa, a small city in the United States
  • a cylinder hat, popular in 19th and early 20th centuries - see top hat

• In holland:
  • Beer. Grote gele pretcylinder.

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