optical disc

Definitions of optical disc
  1. noun
    a disk coated with plastic that can store digital data as tiny pits etched in the surface; is read with a laser that scans the surface
    synonyms: optical disk
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    types:
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    CD, compact disc, compact disk
    a digitally encoded recording on an optical disk that is smaller than a phonograph record; played back by a laser
    DVD, videodisc, videodisk
    a digital recording (as of a movie) on an optical disk that can be played on a computer or a television set
    audio CD, audio compact disc
    compact discs used to reproduce sound (voice and music)
    CD-R, CD-WO, compact disc recordable, compact disc write-once
    a compact disc on which you can write only once and thereafter is read-only memory
    CD-ROM, compact disc read-only memory
    a compact disk that is used with a computer (rather than with an audio system); a large amount of digital information can be stored and accessed but it cannot be altered by the user
    type of:
    memory device, storage device
    a device that preserves information for retrieval
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