Trachea - tracheia, rough; the t. is so called because of its ridged wall.⏎
Tentorium - tentorium, tent.⏎
Sphenoid - sphen, wedge; eidos, like. The s. bone is wedged among the other bones.⏎
Trochlea - trochilea, pulley.⏎
Vestibule - vestibulum, antechamber.⏎