cathode ray
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Definition(s):
- (n) a beam of electrons emitted by the cathode of an electrical discharge tube
Usage(s):
- Despite its brevity, the life line of the lightning flash has been accurately measured by the cathode ray oscillograph.
- Trouble is, the cathode ray tube that gives it its name weighs a ton, so anything over 40 in.
- For 70 million Americans, life compresses to the diagonally measured size of a cathode ray tube.
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