MeSH definition : The numerous (6-12) small thin-walled spaces or air cells in the ETHMOID BONE located
between the eyes. These air cells form an ethmoidal labyrinth.;
MeSH synonym : sinus, ethmoid; Ethmoidal Air Cells; Air Cell, Ethmoidal; Cell, Ethmoidal Air; Ethmoidal Air Cell; Ethmoid Sinuses; Ethmoid Sinuse;