Disc

From Wikipedia, the free encyclopedia

A disc (International English) or disk (American English), from Latin discus which itself derives from Greek δίσκος, is a flat circular object. It may also refer to:

Data storage

  • Disk storage, a general category of data storage mechanisms
    • Magnetic disk
    • Optical disc, commonly a polycarbonate disc
      • Blu-ray Disc (BD), a high-density optical disc intended mainly for video storage
      • Compact Disc (CD), a form of optical disc used mainly for audio data
      • Digital Versatile Disc (DVD), a form of optical disc used mainly for video and other data
      • Enhanced Versatile Disc (EVD), an optical medium-based digital audio/video format under development
      • High-Definition Digital Versatile Disc (HD DVD), a high-density optical disc intended mainly for video storage
      • Holographic Versatile Disc (HVD), a next generation ultra-high-density optical disc format replacement for Blu-ray
      • Laserdisc (LD), the first commercial optical disc storage medium
      • MiniDisc (MD), a magneto-optical disc-based data storage device
    • Disc film, a still-photography film format
    • RAM disk, a volatile solid state drive
  • Analog discs typically relying on a modulated groove to record signals

Science

Astronomy

  • Accretion disc, diffuse material in orbital motion around a central body such as a star or black hole
  • Debris disk, a ring shaped circumstellar disk of dust and debris in orbit around a star
  • Disc (galaxy), a disc-shaped group of stars
  • Protoplanetary disk, a rotating disc of dense gas surrounding a newly formed star, a form of accretion disc
  • Scattered disc, a distant region of the Solar System thinly populated by icy minor planets

Biology

  • Death-inducing signaling complex, a multi-protein complex formed by members of the death receptor family of apoptosis-inducing cellular receptors
  • Disk, an enlargement or outgrowth from the receptacle of the flower
  • Intervertebral disc, in animal anatomy, part of the spine
  • Placenta or placental disc, in mammals, an organ that connects a developing fetus to its mother's uterus
  • Optic disc, in the retina

Mathematics

Psychology

  • DISC1 (Disrupted in Schizophrenia 1), a human gene with a wide array of interactions
  • DISC assessment, in psychology, a group of psychometric tests based on the work of William Moulton Marston

Motoring

  • Disc brake, a device for slowing or stopping the rotation of a wheel
  • Disc parking, a parking regulation with free parking when using a parking disc (clock disc)
  • Vehicle licence, commonly known as a "tax disc" in the UK, is a vehicle licence receipt placed inside the windscreen

DISC

Other uses

  • Disc (band), an American experimental music band
  • Disc (magazine), a British music magazine, at one time known as Disc and Music Echo
  • Disc harrow, a farm implement
  • Disc jockey, a person who selects and plays pre-recorded music for an audience
  • Discworld, a comedic fantasy book series by the British author Terry Pratchett
  • Flying disc, a throwing toy, also known as the Frisbee
  • Disk (album), a 1995 EP by electronic artist Moby

See also

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