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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
therm•i•on•ics(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.
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|Noun||1.||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
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