Ethmoidal foramen

[TA] either of two foramina formed in the medial wall of the orbit by grooves on either edge of the ethmoidal notch of the frontal bone, and completed by similar grooves on the ethmoid bone: anterior ethmoidal foramen, located in an anterior position; posterior ethmoidal foramen located in a posterior position. SYN: foramen ethmoidale (anterior et posterior) [TA].

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