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thermionic

British  
/ ˌθɜːmɪˈɒnɪk /

adjective

  1. of, relating to, or operated by electrons emitted from materials at high temperatures

    a thermionic valve
"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

Example Sentences

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I have even made an attempt to understand the mystery that is called the Thermionic Valve.

From The Tower of Oblivion by Onions, Oliver [pseud.]

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.