'Cathode ray' definitions:

Definition of 'cathode ray'

From: WordNet
noun
A beam of electrons emitted by the cathode of an electrical discharge tube

Definition of 'Cathode ray'

From: GCIDE
  • Cathode \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. [1913 Webster]
  • Cathode ray (Phys.), a kind of ray generated at the cathode in a vacuum tube, by the electrical discharge. [1913 Webster]

Synonyms of 'cathode ray'

From: Moby Thesaurus