n. (Phys.) The part of a vacuum tube opposite the cathode. Upon it the cathode rays impinge. [ 1913 Webster ]
n. [ Gr. &unr_; descent; &unr_; down + &unr_; 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. (Physiol.) A term applied to the centrifugal, or efferent, course of the nervous influence. Marshall Hall. [ 1913 Webster ]
pos>n. A cathode that emits electrons when illuminated. [ WordNet 1.5 ]