adjective Etymology: thermion charged particle from an incandescent source, from therm- + ion Date: 1909 relating to, using, or being the emission of charged particles (as electrons) by an incandescent material

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • thermionic — ► ADJECTIVE ▪ relating to the emission of electrons from substances heated to very high temperatures …   English terms dictionary

  • thermionic — adj. of or relating to electrons emitted from a substance at very high temperature. Phrases and idioms: thermionic emission the emission of electrons from a heated source. thermionic valve (US tube) a device giving a flow of thermionic electrons… …   Useful english dictionary

  • thermionic — adjective concerning the emission of electrons from a heated electrode See Also: thermion, thermionic valve …   Wiktionary

  • thermionic — /θɜmiˈɒnɪk/ (say thermee onik) adjective relating to thermionics or thermions: thermionic emission …   Australian English dictionary

  • thermionic — See thermion. * * * …   Universalium

  • thermionic — adjective relating to or denoting the emission of electrons from substances heated to very high temperatures. Derivatives thermionics plural noun …   English new terms dictionary

  • thermionic — therm·ion·ic …   English syllables

  • thermionic emission — n. the phenomenon of electron or ion emission from the heated surface of a conductor * * * ▪ physics       discharge of electrons from heated materials, widely used as a source of electrons in conventional electron tubes (e.g., television picture …   Universalium

  • thermionic current — n. a current resulting from directed thermionic emission, as the flow of emitted electrons from a heated cathode to the plate …   English World dictionary

  • thermionic tube — n. an electron tube having a cathode electrically heated in order to cause electron or ion emission: Also [Brit., etc.] Brit. thermionic valve …   English World dictionary

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