Breadcrumb Home > Dictionary > Index T thermionics: Meaning and Definition of Find definitions for: therm•i•on•ics Pronunciation: (thûrm"ī-on'iks, thûr"mē-), [key] — n. (used with a sing. v.) the branch of physics that deals with thermionic phenomena. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thermionics (Thesaurus) thermionic current thermionic tube TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: yrrhicvictory Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language