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or·bi·tal plate of eth·moid bone[TA]
a thin plate of ethmoid bone forming part of the medial wall of the orbit and the lateral wall for the ethmoidal labyrinth.
A thin, smooth plate of bone on the lateral surface of the ethmoid bone; it forms part of the orbital plate.
See also: lamina
Synonym for the orbital plate of the ethmoid bone, which forms part of the medial wall of the orbit. It is thus named because it is as thin as paper and this may contribute to an infection of an ethmoidal sinus spreading into the orbit and resulting in orbital cellulitis. See orbital cellulitis.