cold cathode

About 0.07 uses per million words.

Meaning

1. noun A type of cathode that does not use a heating element to produce emission of cathode rays (electrons), beyond base thermionic emission (usually by field electron emission, secondary emission, or photoelectric emission).

Similar words

hot cathode thermionic valve coolidge tube krytron cryocatheter catholyte permatron catholysis cryoelectronics thermocatheter