Cath"ode(?), n. [Gr. descent; down + 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.
(Phys.), a kind of ray generated at the cathode in a vacuum tube, by the electrical discharge.
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