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Cd vs Cylinder - What's the difference?

cd | cylinder |

As nouns the difference between cd and cylinder

is that cd is (astronomy) a type of giant elliptical galaxy while cylinder is (geometry) a surface created by projecting a closed two-dimensional curve along an axis intersecting the plane of the curve.

cd

Translingual

Etymology 1

Symbol

(head)
  • The ISO 3166-1 two-letter (alpha-2) code for Democratic Republic of the Congo.

    • Etymology 2

    Alternative forms

    * cd

    Number

    (mul-number)
  • A Roman numeral representing four hundred ().
    • See also
    * Previous: CCCXCIX (three hundred and ninety-nine, ) * Next: CDI (four hundred and one, )

    Etymology 3

    Initialism

    (Initialism) (head)
  • Corps Diplomatique, diplomatic corps (collective body of foreign diplomats accredited to a particular country or body)
    • ISO 3166-1 Roman numerals ----

    cylinder

    English

    Noun

    (en noun)
  • (geometry) A surface created by projecting a closed two-dimensional curve along an axis intersecting the plane of the curve.
    • When the two-dimensional curve is a circle, the cylinder is called a circular cylinder''. When the axis is perpendicular to the plane of the curve, the cylinder is called a ''right cylinder''. In non-mathematical usage, both ''right'' and ''circular are usually implied.
  • (geometry) A solid figure bounded by a cylinder and two parallel planes intersecting the cylinder.
  • Any object in the form of a circular cylinder.
  • * 1898 — , The War of the Worlds Ch.4
    • A big greyish rounded bulk, the size, perhaps, of a bear, was rising slowly and painfully out of the cylinder .
  • A cylindrical cavity or chamber in a mechanism, such as the counterpart to a piston found in a piston-driven engine.
  • A container in the form of a cylinder with rounded ends for storing pressurized gas.
  • An early form of phonograph recording, made on a wax cylinder.
  • The part of a revolver that contains chambers for the cartridges.
  • (computing) The corresponding tracks on a vertical arrangement of disks in a disk drive considered as a unit of data capacity.

    • See also

    * (wikipedia "cylinder")

    Derived terms

    * cylinder head * cylindrical * fire on all cylinders ----