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the notch in the medial border of the maxilla anteriorly that, with its fellow, forms most of the piriform opening of the nasal cavity.
Synonym(s): incisura nasalis [TA]
1. A deep notch on the anterior surface of the maxilla, forming the lateral border of the piriform aperture.
2. A notch between the internal angular processes of the frontal bone.
See also: notch