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n. (used with a sing. or pl. verb)
The physics of thermionic phenomena.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Electronics) (functioning as singular) the branch of electronics concerned with the emission of electrons by hot bodies and with devices based on this effect, esp the study and design of thermionic valves
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌθɜrm aɪˈɒn ɪks, ˌθɜr mi-)

n. (used with a sing. v.)
the branch of physics dealing with thermionic phenomena.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


the science or study of the emission of electrons from substances at high temperatures. — thermionic, adj.
See also: Physics
the science or study of the emission of electrons from substances at high temperatures. — thermionic, adj.
See also: Heat
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.thermionics - the branch of electronics dealing with thermionic phenomena (especially thermionic vacuum tubes)
electronics - the branch of physics that deals with the emission and effects of electrons and with the use of electronic devices
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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A further section considers dreams, which include thermal and salinity gradients, fuel cells, magneto-hydrodynamics, thermionics, artificial photosynthesis, terraforming, off-planet solar, and nuclear power.
has invented a semiconductor technology that converts heat from a wide variety of sources to electrical energy using solid state thermionics. The most immediate application of this technology could be the recovery of billions of dollars of wasted heat energy that goes up in smoke from stacks and tailpipes every year.
The technology is based on thermionics, which originated nearly a century ago with the basic vacuum tube, a device that consisted of two parallel conductive plates -- cathode and anode -- separated by a vacuum gap.
Talkies were carefully marketed and images as but one more new development in "thermionics," or electrical science--part of a burgeoning age of communication, transportation, and labor saving appliances.
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The Russian thermionics technology favors the use of single-crystal refractory metals to improve structural strength with a CVD coating for the emitter surface.
The U.S.S.R employed thermionics in its Topaz space reactor.) But every other idea has been a commercial success.