The Collaborative International Dictionary
Anticathode
Anticathode \An`ti*cath"ode\, n. (Phys.) The part of a vacuum tube opposite the cathode. Upon it the cathode rays impinge.
Wiktionary
anticathode
n. 1 The opposite of a cathode, an anode. 2 The target at which electrons from the cathode in a CRT or x-ray tube are directed.