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thermion

American

[thurm-ahy-uhn, -on, thur-mee-uhn] / ˈθɜrmˌaɪ ən, -ɒn, ˈθɜr mi ən /

noun

Physics.

an ion emitted by incandescent material.

thermion British

/ ˈθɜːmɪən /

noun

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 Scientific

/ thûr′mī′ən /

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.

Other Word Forms

Etymology

Origin of thermion

First recorded in 1910–15; therm- + ion

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023