Breadcrumb Home > Dictionary Cite Meaning of tracheole Find definitions for: tra•che•ole Pronunciation: (trā'kē-ōl"), [key] — n. Entomol. any of the smallest branches of an insect trachea. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tracheobronchial tracheophyte Related Content Daily Word Quiz: parallax Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language