glow discharge

noun Physics.
the conduction of electricity in a low-pressure gas, producing a diffuse glow.

Origin:
1835–45

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World English Dictionary
glow discharge
 
n
a silent luminous discharge of electricity through a low-pressure gas

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
He modified a glow discharge using a concave cathode and a small hollow anode.
The constricted plasma source utilizes a special form of a dc glow discharge, the constricted glow discharge.
The photo below shows a neon glow discharge in the machine.
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