thermionics: Meaning and Definition of

therm•i•on•ics

Pronunciation: (thûrm"ī-on'iks, thûr"mē-), [key]
— n. (used with a sing. v.)
  1. the branch of physics that deals with thermionic phenomena.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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