/ Dictionary / Index T tetrode: Meaning and Definition of Find definitions for: tet•rode Pronunciation: (te'trōd), [key] — n. Electronics. a vacuum tube containing four electrodes, usually a plate, two grids, and a cathode. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tetrode (Thesaurus) Tetrazzini tetrodotoxin Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language