Dictionary:

cylinder

  (sĭl'ən-dər)

(Click to enlarge)

cylinder

To calculate the volume of a right circular cylinder, multiply the area of the base by the altitude. (Academy Artworks)

1. Mathematics.
   1. The surface generated by a straight line intersecting and moving along a closed plane curve, the directrix, while remaining parallel to a fixed straight line that is not on or parallel to the plane of the directrix.
   2. The portion of such a surface bounded by two parallel planes and the regions of the planes bounded by the surface.
   3. A solid bounded by two parallel planes and such a surface, especially such a surface having a circle as its directrix.
2. A cylindrical container or object.
3. Engineering.
   1. The chamber in which a piston of a reciprocating engine moves.
   2. The chamber of a pump from which fluid is expelled by a piston.
4. The rotating chamber of a revolver that holds the cartridges.
5. Any of several rotating parts in a printing press, especially one that carries the paper.
6. Archaeology. A cylindrical stone or clay object with an engraved design or inscription.

[Latin cylindrus, from Greek kulindros, from kulindein, to roll.]

The solid of revolution obtained by revolving a rectangle about a side is called a cylinder, or more precisely a right circular cylinder. More generally the word cylinder is used in solid geometry to describe any solid bounded by two parallel planes and a portion of a closed cylindrical surface. In analytic geometry, however, the word cylinder refers not to a solid but to a cylindrical surface (see illustration). This is a surface generated by a straight line which moves so that it always intersects a given plane curve called the directrix, and remains parallel to a fixed line that intersects the plane of the directrix. Cylinders whose right sections are circles, ellipses, parabolas, or hyperbolas are called circular cylinders, elliptic cylinders, parabolic cylinders, or hyperbolic cylinders, respectively. All these are quadric cylinders. See also Euclidean geometry.

Cylindrical surface.

The aggregate of all tracks that reside in the same location on every disk surface. On multiple-platter disks, the cylinder is the sum total of every track with the same track number on every surface. On a floppy disk, a cylinder comprises the top and corresponding bottom track.

When storing data, the operating system fills an entire cylinder before moving to the next one. The access arm remains stationary until all the tracks in the cylinder have been read or written.

Cylinder

The cylinder is the aggregate of the same track number on every platter used for recording.

A term used to describe a transaction, involving two derivatives, where there is no initial cost bourne by the investor when entering into the position.

Investopedia Says:
For example, an investor can sell a derivative and use its proceeds to purchase another security. A cylinder is different from a positive carry trade since it does not necessarily imply offsetting positions.

Related Links:
For those who are new to futures but want a solid understanding of them, this tutorial explains what futures contracts are, how they work and why investors use them. Futures Fundamentals

Cylindrical devices on a printing press, including plate cylinders, blanket cylinders, and impression cylinders. In direct printing, the impression cylinder presses the paper against the plate cylinder. In offset printing, the blanket cylinder is pressed against the paper, transferring the image from one surface to another.

In a lock, the cylindrically shaped assembly containing the tumbler mechanism and the keyway, which can be actuated only by the correct keys.

Cylinder may refer to:

• Cylinder (geometry), a three-dimensional geometric surface
• Cylinder (algebra), the cartesian product of a set with its superset
• Cylinder (engine), the space within which a piston travels in an engine
• 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

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.

This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)

Dansk (Danish)
n. - cylinder, tønde, valse

Nederlands (Dutch)
cilinder, cilindrische rol

Français (French)
n. - (Aut, Math, Tech) cylindre, rouleau, barillet (fusil)

Deutsch (German)
n. - Zylinder, Walze

Ελληνική (Greek)
n. - κύλινδρος

Italiano (Italian)
cilindro

Português (Portuguese)
n. - cilindro (m), rolo (m), tambor (m) (de revólver), alisador (m)

Русский (Russian)
цилиндр

Español (Spanish)
n. - cilindro

Svenska (Swedish)
n. - cylinder, lopp (eldvapen), vals, rulle

中文（简体） (Chinese (Simplified))
圆筒, 汽缸, 圆筒状之物

中文（繁體） (Chinese (Traditional))
n. - 圓筒, 汽缸, 圓筒狀之物

한국어 (Korean)
n. - 원주, 실린더

日本語 (Japanese)
n. - 円筒, 円柱, 円筒形の物, シリンダー, 気筒, 弾倉

العربيه (Arabic)
‏(الاسم) أسطوانه‏

עברית (Hebrew)
n. - ‮גליל‬

If you are unable to view some languages clearly, click here.

To select your translation preferences click here.