cathode ray tube

English

Alternative forms

Noun

cathode ray tube (plural cathode ray tubes)

  1. (electronics) A vacuum tube that displays still or moving images (such as for a television), by controlling the direction of a cathode ray emitted towards the front of the tube. The front is coated by a layer of fluorescent material, so that it emits light when struck by the beam.
    Synonyms: CRT, picture tube, (historical) Braun tube
    Hyponyms: television tube, teletube

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