The Collaborative International Dictionary
Entobronchium
Entobronchium \En`to*bron"chi*um\, n.; pl. Entobronchia. [See Ento-, and Bronchia.] (Anat.) One of the main bronchi in the lungs of birds.
Wiktionary
entobronchium
n. One of the main bronchus in the lungs of birds.