ethmoid cells

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eth·moid cells

ethmoidal air cells; evaginations of the mucous membrane of the middle and superior meatus of the nasal cavity into the ethmoidal labyrinth forming multiple small paranasal sinuses; they are subdivided into anterior, middle and posterior ethmoidal sinuses. See: anterior ethmoidal cells, middle ethmoidal cells, posterior ethmoidal cells.

eth·moid cells

(ethmoyd selz)
Evaginations of the mucous membrane of the middle and superior meatus of the nasal cavity into the ethmoidal labyrinth forming multiple small paranasal sinuses.

eth·moid cells

(ethmoyd selz)
Ethmoidal air cells; evaginations of mucous membrane of middle and superior meatus of nasal cavity into ethmoidal labyrinth forming multiple small paranasal sinuses; subdivided into anterior, middle and posterior ethmoidal sinuses.
See: anterior ethmoidal cells
Synonym(s): ethmoidal sinuses.