Quad as a word or

prefix A prefix is an affix which is placed before the Word stem, stem of a word. Adding it to the beginning of one word changes it into another word. For example, when the prefix ''un-'' is added to the word ''happy'', it creates the word ''unhappy'' ...

usually means 'four'. It may refer to:

Government

* Quadrilateral Security Dialogue, a strategic security dialogue between Australia, India, Japan, and the United States * Quadrilateral group, an informal group which includes the trade spokesmen of the United States, Japan, Canada, and the European Union * Quad Cities, a group of five cities straddling the boundary between the U.S. states of Iowa and Illinois * The "Quad", the senior members of the Cameron–Clegg coalition government in the United Kingdom from 2010 to 2015

Art and entertainment

Matthias Quad Matthias Quad (1557–1613) was an engraver and cartographer from Cologne. He was the first European mapmaker to use dotted lines to indicate international borders.Helmut Walser Smith, ''The Continuities of German History'' (Cambridge Unive ...

(1557–1613), engraver and cartographer * ''Quad'' (film), 2015 *

Quad (music) Quad or QUAD was the name of a solo music project by Gary Ramon. During his six-year hiatus from Sun Dial, Ramon embarked on an ambitious solo project, Quad, which combined ambient electronica with kraut rock. The result was a pair of self-tit ...

, a musical project by Gary Ramon * ''Quad'' (play), by Samuel Beckett * ''The Quad'' (TV series), 2017 * Quad (arts centre), in Derby, United Kingdom * Quad Cinema, art house in New York City, New York * Quad (company), formerly Quad/Graphics, an American printing company *

Quadruple combination The standard works of the Church of Jesus Christ of Latter-day Saints (LDS Church, the largest in the Latter Day Saint movement) are the four books that currently constitute its open scriptural canon. The four books of the standard works are: * T ...

, the four books that comprise the canon of the LDS church

Medicine and anatomy

* Quadriplegic, a person paralyzed in all four limbs * Quadriceps femoris, a large leg muscle group * Quadruplets, four children from a multiple birth

Sports

* Quad (figure skating), a figure skating jump with four revolutions * Quad scull, a boat configuration of four rowers * Quad skates, roller skates with two wheels on each of two axles * Quad, one of the divisions in wheelchair tennis * Quadruple-double, a statistical accomplishment in basketball * Quadrennium, the 4-year training cycle between Olympic games

Transportation

* Quad bike or all-terrain vehicle, a vehicle that travels on low-pressure tires * Quad, a tandem bicycle with four seats * Quadracycle, a four-wheeled human-powered land vehicle * Jeffery Quad, a four-wheel drive truck * Quadcopter, a four-rotor helicopter * Quad, a chairlift in skiing which carries four persons * Quad, or railroad speeder, a motorized vehicle used for maintenance on railroads * Quad (rocket), an autonomous rocket by Armadillo Aerospace

Technology

QUAD (cipher) In cryptography, the QUAD, cipher is a relatively new stream cipher, which was designed with provable security arguments in mind. Description QUAD relies on the iteration of a randomly chosen multivariate quadratic system S=(Q1, ..., Qm) of m=kn ...

, a stream cipher *

QUaD Quad as a word or prefix usually means 'four'. It may refer to: Government * Quadrilateral Security Dialogue, a strategic security dialogue between Australia, India, Japan, and the United States * Quadrilateral group, an informal group which inc ...

, a microwave telescope at the South Pole * Quad antenna, a directional antenna * Quad Electroacoustics, a British manufacturer of audio equipment *

Quadraphonic sound Quadraphonic (or quadrophonic and sometimes quadrasonic) sound – equivalent to what is now called 4.0 surround sound – uses four audio channels in which speakers are positioned at the four corners of a listening space. The system allows for th ...

, four-channel sound * Quadruplex videotape, video tape format *

Quad Flat Package A quad flat package (QFP) is a surface-mounted integrated circuit package with "gull wing" leads extending from each of the four sides. Socketing such packages is rare and through-hole mounting is not possible. Versions ranging from 32 to 304 ...

, a type of package for surface mounted integrated circuit *

Star quad cable Star-quad cable is a four-conductor cable that has a special quadrupole geometry which provides magnetic immunity when used in a balanced line. Four conductors are used to carry the two legs of the balanced line. All four conductors must be an ...

, four insulated conductors twisted together

Other uses

* Quad (unit), unit of energy, short for ''quadrillion'', 10¹⁵ BTU *

Quadrangle (architecture) In architecture, a quadrangle (or colloquially, a quad) is a space or a courtyard, usually rectangular (square or oblong) in plan, the sides of which are entirely or mainly occupied by parts of a large building (or several smaller buildings). T ...

, a space or courtyard bordered by buildings *

Quad (geography) A "quadrangle" is a topographic map produced by the United States Geological Survey (USGS) covering the United States. The maps are usually named after local physiographic features. The shorthand "quad" is also used, especially with the name of t ...

, a United States Geological Survey topographical map * Quad (typography), a spacer used in letterpress type * Quadrilateral, in geometry * Quad poster, a common UK size of film poster * Quadrat, in ecology, a small study area or a frame used to define it * Quadrupel, a Belgian beer *

The Quad Resort and Casino The Linq (formerly Flamingo Capri, Imperial Palace and The Quad) is a casino hotel on the Las Vegas Strip in Paradise, Nevada. It is owned and operated by Caesars Entertainment. It opened as the Flamingo Capri in 1959, on property located directl ...

, on the Las Vegas Strip * Four-of-a-kind in poker