Cylinder (disambiguation)

Cylinder could mean:

• Cylinder, a three-dimensional geometric surface
• Cylinder (engine), the space within which a piston travels in an engine
• Cylinder (algebra), the cartesian product of a set with its superset
• Cylinder (steam locomotive)
• Cylinder (computer), a unit of data division on a hard disk drive
• 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
• Gas cylinder, containers used to store compressed gases or compressed air
• Diving cylinder, a type of gas cylinder used in Scuba diving
• Graduated cylinder, glassware used for measurement of liquids in laboratories
• Phonograph cylinder, the dominant medium of audio storage from the 1870s to the 1910s and in limited use (such as in the dictaphone) through the mid 20th century
• Cylinder (firearms), the cylinder is the rotating device that contains the firing chambers of a revolver
• A type of lens and a form of refraction error