/ Dictionary / Index T tracheation: Meaning and Definition of Find definitions for: tra•che•a•tion Pronunciation: (trā"kē-ā'shun), [key] — n. the arrangement of tracheae in insects and other arthropods. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tracheate tracheid Related Content Daily Word Quiz: ravenous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language