[TA] a passage from the middle meatus of the nose communicating with the anterior ethmoidal cells and frontal sinus. Synonym(s): infundibulum ethmoidale [TA], ethmoid infundibulum
eth·moid in·fun·dib·u·lum
(eth'moyd in'fŭn-dib'yū-lŭm) A passage from the middle meatus of the nose communicating with the anterior ethmoid cells and frontal sinus.