Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.
Related to tracheal bifurcation: Bifurcation of the trachea
the division of the trachea into the right and left main bronchi; it occurs at the level of the fifth or sixth thoracic vertebral body and is marked internally by the presence of a carina or keellike ridge between the diverging bronchi.
1. a division into two branches.
2. the point at which division into two branches occurs.
termination of the trachea, where it divides into two principal bronchi.