cathode : Idioms & Phrases
Cathode ray
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noun a beam of electrons emitted by the cathode of an electrical discharge tube
WordNet
(Phys.) , a kind of ray generated at the cathode in a vacuum tube, by the electrical dischargeX-ray .
Webster 1913
cathode-ray oscilloscope
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noun electronic equipment that provides visual images of varying electrical quantities
scope; CRO; oscilloscope.
WordNet
cathode-ray tube
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noun a vacuum tube in which a hot cathode emits a beam of electrons that pass through a high voltage anode and are focused or deflected before hitting a phosphorescent screen
CRT.
WordNet
cold cathode
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noun a cathode that is a source of electrons without being heated