Maxillary hiatus

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Maxillary hiatus
Medial wall of left orbit.
Left maxilla. Nasal surface.
Latin hiatus maxillaris
TA A02.1.12.021
FMA 57758
Anatomical terminology

Below the bulla ethmoidalis, and partly hidden by the inferior end of the uncinate process of ethmoid bone, is the maxillary hiatus (or ostium maxillare, or maxillary sinus ostium, or maxillary ostium, or opening from the maxillary sinus); in a frontal section this opening is seen to be placed near the roof of the sinus.

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This article incorporates text in the public domain from page 995 of the 20th edition of Gray's Anatomy (1918)