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Medical Definition of Hiatus ethmoidalis
1. 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: hiatus semilunaris, hiatus ethmoidalis. (05 Mar 2000)
Lexicographical Neighbors of Hiatus Ethmoidalis
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