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