thermion

[thurm-ahy-uh n, -on; thur-mee-uh n]

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noun Physics.

an ion emitted by incandescent material.

Origin of thermion

First recorded in 1910–15; therm- + ion

Related formstherm·i·on·ic, adjectivetherm·i·on·i·cal·ly, adverb

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for thermionic

computerized, anodic, cathodic, thermionic, voltaic

Examples from the Web for thermionic

Historical Examples of thermionic

Above the mantel of the lodge's thermionic fireplace was hung a brilliant cascading stereo of Yosemite Falls in misty motion.
Deepfreeze
Robert Donald Locke
I have even made an attempt to understand the mystery that is called the Thermionic Valve.
The Tower of Oblivion
Oliver Onions

British Dictionary definitions for thermionic

thermionic

adjective

of, relating to, or operated by electrons emitted from materials at high temperaturesa thermionic valve

thermion

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

thermionic in Science

thermion

[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.