Pronunciation: (trā'kē-u or, esp. Brit.,tru-kē'u), [key]
—pl. tra•che•aePronunciation: (trā'kē-ē" or, esp. Brit.,tru-kē'ē), [key] tra•che•as.
1. Anat., Zool.the tube in humans and other air-breathing vertebrates extending from the larynx to the bronchi, serving as the principal passage for conveying air to and from the lungs; the windpipe. See diag. under lung.
2. (in insects and other arthropods) one of the air-conveying tubes of the respiratory system.
3. Bot.vessel (def. 5).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.