Definitions from Wiktionary (Cathode-ray tube)

▸ noun:  Alternative spelling of cathode ray tube [(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.]
▸ Also see cathode-ray_tube


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