Ethmoidectomy is the medical name for a procedure that involves removing the partitions between the ethmoid sinus

Ethmoid sinus

The ethmoid sinus is each of the two paranasal sinuses within the ethmoid bone, comprising the ethmoidal air cells and filled with air. These are divided into anterior, middle and posterior group. The ethmoidal air cells consist of numerous thin-walled cavities situated in the ethmoidal labyrinth...

es in order to create larger sinus cavities. This procedure treats sinus infections and sinus obstructions that have been the cause of chronic sinus problems. The procedure may also involve the removal of nasal polyps present in the ethmoids.