/ Dictionary / Index T triode: Meaning and Definition of Find definitions for: tri•ode Pronunciation: (trī'ōd), [key] — n. Electronics. a vacuum tube containing three elements, usually anode, cathode, and control grid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: triode (Thesaurus) trio trioecious Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language