glow tube

/gloʊ tub/
IPA guide

Other forms: glow tubes

Definitions of glow tube
  1. noun
    a gas-discharge tube consisting of a cold cathode and a diode in a tube filled with gas; the color of the glow depends on the particular gas
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    type of:
    gas-discharge tube
    a tube in which an electric discharge takes place through a gas
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