The Collaborative International Dictionary
Tracheobronchial
Tracheobronchial \Tra`che*o*bron"chi*al\, a. (Zo["o]l.) Pertaining both to the tracheal and bronchial tubes, or to their junction; -- said of the syrinx of certain birds.
Wiktionary
tracheobronchial
a. Relating to or located in both the trachea and the bronchi.