Definition of cathode ray tube in US English:

cathode ray tube

(also CRT, cathode-ray tube)


  • A high-vacuum tube in which cathode rays produce a luminous image on a fluorescent screen, used in televisions and computer terminals.

    • ‘Both give much better picture quality than conventional televisions, with their bulky cathode ray tube.’
    • ‘He found that if the tube was placed within an electric or magnetic field, then the cathode rays could be deflected or moved (this is how the the cathode ray tube on your television works).’
    • ‘For the past 75 years, the vast majority of televisions have been built around the same technology, the cathode ray tube.’
    • ‘These displays have been in development for almost two decades and utilize a type of cathode ray tube with as many cathodes as pixels and a high internal vacuum.’
    • ‘The cathode ray tube of any TV or computer monitor is really a particle accelerator.’
    display, monitor, visual display unit, vdu, cathode-ray tube, crt
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cathode ray tube

/ˈkaˌTHōd rā t(y)o͞ob/