Definition of discharge tube in English:

discharge tube

Syllabification: dis·charge tube
Pronunciation: /ˈdisˌCHärj ˌt(y)o͞ob


  • A tube containing charged electrodes and filled with a gas in which ionization is induced by an electric field. The gas molecules emit light as they return to the ground state.
    More example sentences
    • In 1895, a German physicist named Wilhelm Roentgen made the discovery while experimenting with electron beams in a gas discharge tube.
    • The discharge tube is a lot like a neon light or fluorescent lamp.
    • The scroll collects the compressed air and forces it into the discharge tube, then into the intake manifold.

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