(anatomy, relational) Of or pertaining to the trachea.

Via the trachea

(pathology) The formation of rings of cartilage in the esophagus similar to those in the trachea

(anatomy) A smooth muscle that bridges the gap between the free ends of C-shaped cartilages at the posterior border of the trachea, adjacent to the oesophagus, and allows air to be expelled forcefully.

That lacks a trachea

(genetics) A gene whose mutation affects the trachea of certain insects