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Medical Term:

ethmoidal labyrinth


Definition: a mass of air cells with thin bony walls forming part of the lateral wall of the nasal cavity; the cells are arranged in three groups, anterior, middle, and posterior, and are closed laterally by the orbital plate which forms part of the wall of the orbit.

Synonym(s): labyrinthus ethmoidalisTA, ectethmoid, ectoethmoid, lateral mass of ethmoid bone