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Medical Term:

semilunar hiatus


a deep, narrow groove in the lateral wall of the middle meatus of the nasal cavity, into which the maxillary sinus, the frontonasal duct, and the middle ethmoid cells open.

Synonym(s): hiatus semilunarisTA, hiatus ethmoidalis

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.