cathode ray

3 ENTRIES FOUND:

cathode ray

noun

Definition of CATHODE RAY

1
plural :  the high-speed electrons emitted in a stream from the heated cathode of a vacuum tube
2
:  a stream of electrons emitted from the cathode of a vacuum tube —usually used in plural

First Known Use of CATHODE RAY

1880

Rhymes with CATHODE RAY

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cathode ray

noun    (Concise Encyclopedia)

Stream of electrons leaving the negative electrode, or cathode, in an evacuated or gas-filled discharge tube or emitted by a heated filament in certain electron tubes. Cathode rays cause fluorescent materials to luminesce and are utilized in cathode-ray oscilloscopes and television tubes (see cathode-ray tube).

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