| cathode | a negatively charged electrode that is the source of electrons in an electrical device |
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| cathode | the positively charged terminal of a voltaic cell or storage battery that supplies current |
| cathode | a beam of electrons emitted by the cathode of an electrical discharge tube |
| cathode | electronic equipment that provides visual images of varying electrical quantities |
| cathode | 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 |