cold cathode

noun

cold cathode

noun

1

Business, Electrical engineering, Electricity, Electromagnetism, Electronics, Energy, Engineering, Natural sciences, Physical sciences, Physics 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).

On the open portions of the platforms the loudspeakers are installed on the cold cathode lighting columns.1962 June, “The Eastern Region completes the Colchester scheme”, in Modern Railways, page 412:

Derived terms: cold-cathode fluorescent lamp, cold-cathode lamp, cold-cathode light, cold-cathode tube

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.