A cylinder is a basic curvilinear geometric shape.

Cylinder may also refer to:

  • Cylinder (algebra), the Cartesian product of a set with its superset
  • Cylinder (disk drive), a division of data in a disk drive
  • Cylinder (engine), the space in which a piston travels in an engine
  • Cylinder (firearms), the rotating part of a revolver containing multiple chambers
  • Cylinder (gastropod), a subgenus of sea snails
  • Cylinder (locomotive), the components that convert steam power into motion
  • Cylinder (optometry)
  • Cylinder, Iowa, a city in Palo Alto County, Iowa, United States
  • Cylinder set, a natural basic set in product spaces
  • Cylinder set measure, a way to generate a measure over product spaces
  • Gas cylinder, a high-strength container for storing gases at high pressure
  • Phonograph cylinder, the earliest commercial medium for recording and reproducing sound

See also

  • Cylindera, a genus of ground beetles