bulla ethmoidalis


eth·moi·dal bul·la

[TA] a bulging of the inner wall of the ethmoidal labyrinth in the middle meatus of the nose, just below the middle nasal concha; it is regarded as a rudimentary concha. Synonym(s): bulla ethmoidalis [TA]

bulla ethmoidalis

A rounded, thin-walled, bony projection into the middle meatus of the nose underneath the middle turbinate bone, formed by an anterior ethmoid sinus.See also: bulla