/ Dictionary / Index T tetrasyllable: Meaning and Definition of Find definitions for: tet•ra•syl•la•ble Pronunciation: (te'tru-sil"u-bul, te"tru-sil'-), [key] — n. a word or line of verse of four syllables. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tetrastyle tetravalent 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