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Webster 1913 Edition
Cathode
Cath′ode
,Noun.
[Gr. [GREEK] descent; [GREEK] down + [GREEK] way.]
(Physics)
The part of a voltaic battery by which the electric current leaves substances through which it passes, or the surface at which the electric current passes out of the electrolyte; the negative pole; – opposed to anode.
Faraday.
Cathode ray
(Phys.)
, a kind of ray generated at the cathode in a vacuum tube, by the electrical discharge.
Definition 2025
cathode
cathode
English
Alternative forms
Noun
cathode (plural cathodes)
- (electricity) An electrode, of a cell or other electrically polarized device, through which a positive current of electricity flows outwards (and thus, electrons flow inwards). It usually, but not always, has a positive voltage.
- (chemistry, by extension) The electrode at which chemical reduction of cations takes place, usually resulting in the deposition of metal onto the electrode.
- (electronics) The electrode from which electrons are emitted into a vacuum tube or gas-filled tube.
- (electronics) That electrode of a semiconductor device which is connected to the n-type material of a p-n junction.
Coordinate terms
Derived terms
Translations
electrode through which current flows outward
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