cold cathode

noun Electronics.
a cathode, in an electron tube (cold-cathode tube) or lamp, that emits electrons without having to be heated.

1925–30 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
cold cathode
electronics a cathode from which electrons are emitted at ambient temperature, due to a high potential gradient at the surface

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Example sentences
There are a lot more details in our paper on the cold cathode system for increasing targeting accuracy during radiation therapy.
Lit by rare cold cathode technology, not neon, it's one of a kind and a spectacular sight at night.
Our novel approach is based on a novel high current cold cathode and a tunable resonant cavity.
Farnsworth also invented the first cold cathode ray tubes and the first simple electronic microscope.
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