Definition of cathode ray in English:

cathode ray


  • A beam of electrons emitted from the cathode of a high-vacuum tube.

    • ‘One member of the radio society even has a major collection of cathode ray oscilloscopes, which he displays along one complete wall in his home.’
    • ‘Inside this glass tube, evacuated of air, a negatively charged and heated metal plate emitted a beam - a cathode ray - that could be focused and accelerated by its attraction towards a positively charged plate.’
    • ‘Cold cathode ray technology illuminates the instrument faces, while the indicators are backlit.’
    • ‘TV detector vans do not work by picking up radiation from the cathode ray tube’
    • ‘This sends information to the cathode ray in the back of your television, which projects it onto the screen.’