AskDefine | Define quad

Dictionary Definition



1 one of four children born at the same time from the same pregnancy [syn: quadruplet]
2 a muscle of the thigh that extends the leg [syn: quadriceps, quadriceps femoris, musculus quadriceps femoris]
3 (printing) a block of type without a raised letter; used for spacing between words [syn: space]
4 a rectangular area surrounded on all sides by buildings [syn: quadrangle]

User Contributed Dictionary




  1. A quadrangle (courtyard).
  2. A quadruplet (infant).
  3. short for quadrilateral
  4. short for quadricep muscle


A quadrangle
A quadruplet

Related terms

Extensive Definition

Quad may refer to:


  • Quadrangle in architecture, e.g., on a university campus
  • Quad, a dormitory room or suite housing four residents
  • Quad Cities, a region which includes the cities of Iowa cities of Bettendorf and Davenport and the Illinois cities of Moline, East Moline, and Rock Island


  • Quad Damage, a Quake and Unreal Tournament power-up
  • Quad, a type of combined robotic enemy in the Nintendo Gamecube game Metroid Prime 2
  • Quad (more commonly Quads), four of a kind in poker
  • Quad, an Harkonnen attack vehicle from the computer game Dune 2
  • Quad cannon, an anti-air weapon in Command & Conquer: Generals

Music, theatre and film

Science and mathematics

  • Quadriceps, a muscle
  • Quadruped, a creature or mechanism which moves on four legs
  • Quad (energy), a unit of energy (short for quadrillion) defined as 1015 British thermal units (about 1.055 exajoule (EJ) or 1.055 × 1018 J)
  • Quadrilateral, a four sided figure in plane geometry
  • Quadratic, the second power in mathematics
  • Quadrangle (geography), a 7.5-minute topographic map produced by the United States Geological Survey, covering in greater detail one quarter of the area of a 15-minute map
  • QUaD, a telescope located at the South Pole that is designed to measure the cosmic microwave background radiation polarization

Society and religion

  • Quad, a derogatory term for a quadriplegic
  • Quadrangle Club, one of the ten eating clubs at Princeton University
  • Quad, a unique member of a small group of employees from a single organisation sharing a common experience



  • Quad-core
  • Quad precision, a number stored using 16 eight-bit bytes, which is four times the size of 4-byte single precision
  • Quad Electroacoustics, a British manufacturer of electronic amplifiers, tuners and loudspeakers mainly for the high-end domestic market
  • Quad, an abbreviation for a type of videotape recorder, especially 2" Quadruplex videotape, where there are four record heads on a spinning drum which move perpendicular to the direction of tape travel
  • Quad, telecommunication term referring to a cable with four conductors in a square formation used to form two balanced pairs
  • Star quad, a cable with four conductors in a square formation, in which opposite conductors are connected in parallel at both ends to form a single, magnetically-concentric balanced pair, in order to minimise magnetic induction
  • Quadraphonic, or four-channel sound
  • quad, abbreviation for Quadrupole ion trap
  • Em quad, in typography, a space that is as wide as the height of the font
    • En quad, a space that is one half the width of an em quad
  • QUAD_(cipher), a stream cipher


  • Quadriga
  • Quadruple combination fire apparatus that features a pump, tank, hose and a full complement of ground ladders
  • Quad, a tandem bicycle with four seats
  • Quad, a muscle car with a four-barrel carburetor
  • Quad, the nickname of the Morris C8 artillery gun tractor
  • Quad (rocket), an autonomous rocket by Armadillo Aerospace
  • Quads refer to four exhaust pipes (usually grouped two on each end) of a vehicle
quad in French: Quad (homonymie)
quad in Italian: Quad
quad in Dutch: Quad
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