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thermion

[ thurm-ahy-uhn, -on; thur-mee-uhn ]

noun

, Physics.
  1. an ion emitted by incandescent material.


thermion

/ ˈθɜːmɪən /

noun

  1. physics an electron or ion emitted by a body at high temperature
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


thermion

/ thûrmī′ən /

  1. An electrically charged particle or ion that is emitted by a heated conducting material. The electrons emitted from the cathodes of electron tubes (such as cathode ray tubes ) are thermions.


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Other Words From

  • thermi·onic adjective
  • thermi·oni·cal·ly adverb
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Word History and Origins

Origin of thermion1

First recorded in 1910–15; therm- + ion

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Thermidorianthermionic