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a gradually deepening groove on the orbital surface of the maxilla, which leads to the infraorbital canal.
Synonym(s): sulcus infraorbitalis [TA]
The groove on the orbital surface of the maxilla that runs forward to become the infraorbital canal. The infraorbital nerve runs in the groove and canal to exit through the infraorbital foramen on the front of the skull just below the orbit.
See also: groove
in·fra·or·bit·al groove(infră-ōrbi-tăl grūv) [TA]
Gradually deepening groove on orbital surface of maxilla.