Cylinder most commonly refers to:
  • Cylinder (geometry)
    Cylinder (geometry)
    A cylinder is one of the most basic curvilinear geometric shapes, the surface formed by the points at a fixed distance from a given line segment, the axis of the cylinder. The solid enclosed by this surface and by two planes perpendicular to the axis is also called a cylinder...

    , a three-dimensional geometric shape

Cylinder may also refer to:

Science and technology

  • Cylinder (engine)
    Cylinder (engine)
    A cylinder is the central working part of a reciprocating engine or pump, the space in which a piston travels. Multiple cylinders are commonly arranged side by side in a bank, or engine block, which is typically cast from aluminum or cast iron before receiving precision machine work...

    , the space in which a piston travels in an engine
  • Gas cylinder
    Gas cylinder
    A gas cylinder is a pressure vessel used to store gases at above atmospheric pressure. High pressure gas cylinders are also called bottles. Although they are sometimes colloquially called "tanks", this is technically incorrect, as a tank is a vessel used to store liquids at ambient pressure and...

    , a container for storing compressed gas
  • Cylinder (firearms)
    Cylinder (firearms)
    In firearms terminology, the Cylinder refers to the cylindrical, rotating part of a revolver containing multiple cartridge chambers. The cylinder revolves around a central axis in the revolver to bring each individual chamber into alignment with the barrel for firing...

    , the rotating device that contains the firing chambers of a revolver
  • Cylinder lock
    Cylinder lock
    A cylinder lock is a lock constructed with a cylinder that a locksmith can easily unscrew to facilitate rekeying. The cylinder may contain any of a variety of locking mechanisms, including the pin tumbler lock, the wafer tumbler lock and the disc tumbler lock....

    , the part that is profiled to accept a specific key

Information storage

  • Phonograph cylinder
    Phonograph cylinder
    Phonograph cylinders were the earliest commercial medium for recording and reproducing sound. Commonly known simply as "records" in their era of greatest popularity , these cylinder shaped objects had an audio recording engraved on the outside surface which could be reproduced when the cylinder was...

    , the dominant medium of audio storage from the 1870s to the 1910s
  • Cylinder (disk drive)
    Cylinder (disk drive)
    A disk drive cylinder is a division of data in a disk drive, as used in the CHS addressing mode of a Fixed Block Architecture disk or the cylinder–head–record addressing mode of a CKD disk. The concept is concentric, hollow, cylindrical slices through the physical disks , collecting the respective...

    , in computer hard drives
  • Cylinder seal
    Cylinder seal
    A cylinder seal is a cylinder engraved with a 'picture story', used in ancient times to roll an impression onto a two-dimensional surface, generally wet clay. Cylinder seals were invented around 3500 BC in the Near East, at the contemporary site of Susa in south-western Iran and at the early site...

    , an ancient, often clay, cylinder engraved with a 'picture story'
  • Cuneiform script
    Cuneiform script
    Cuneiform script )) is one of the earliest known forms of written expression. Emerging in Sumer around the 30th century BC, with predecessors reaching into the late 4th millennium , cuneiform writing began as a system of pictographs...

    s, on cylinders, e.g. ancient documents of Babylonian kings:
    • Cylinder of Nabonidus
      Cylinder of Nabonidus
      The Nabonidus Cylinder from Sippar is a long text in which king Nabonidus of Babylonia describes how he repaired three temples: the sanctuary of the moon god Sin in Harran, the sanctuary of the warrior goddess Anunitu in Sippar, and the temple of Šamaš in Sippar...

    • Cyrus Cylinder
      Cyrus cylinder
      The Cyrus Cylinder is an ancient clay cylinder, now broken into several fragments, on which is written a declaration in Akkadian cuneiform script in the name of the Achaemenid king Cyrus the Great. It dates from the 6th century BC and was discovered in the ruins of Babylon in Mesopotamia in 1879...

See also

  • Hydraulic cylinder
    Hydraulic cylinder
    A Hydraulic cylinder is a mechanical actuator that is used to give a unidirectional force through a unidirectional stroke. It has many applications, notably in engineering vehicles.- Operation :...

    , using pressurized liquid
  • Pneumatic cylinder
    Pneumatic cylinder
    Pneumatic cylinders are mechanical devices which utilize the power of compressed gas to produce a force in a reciprocating linear motion....

    , using compressed gas
    • Cylinder (locomotive), in a steam locomotive
  • Graduated cylinder
    Graduated cylinder
    A graduated cylinder, measuring cylinder or graduate is a piece of laboratory equipment used to accurately measure the volume of a liquid. Water displacement can be used to find out the volume of a solid. Graduated cylinders are generally more accurate and precise for this purpose than flasks and...

    , glassware for measurement of liquids in laboratories
  • Cylinder set
    Cylinder set
    In mathematics, a cylinder set is the natural open set of a product topology. Cylinder sets are particularly useful in providing the base of the natural topology of the product of a countable number of copies of a set...

    , the natural open set of a product topology.
  • Cylinder hat, popular in 19th and early 20th centuries
  • Cylindrical lens
    Cylindrical lens
    A cylindrical lens is a lens which focuses light which passes through on to a line instead of on to a point, as a spherical lens would. The curved face or faces of a cylindrical lens are sections of a cylinder, and focus the image passing through it onto a line parallel to the intersection of the...

    , a type of lens
  • Diving cylinder
    Diving cylinder
    A diving cylinder, scuba tank or diving tank is a gas cylinder used to store and transport high pressure breathing gas as a component of a scuba set. It provides gas to the scuba diver through the demand valve of a diving regulator....

    , a type of gas cylinder used in scuba-diving
  • Cylindrical error, a form of refractive error
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