sphenoethmoid recess
noun
sphe·no·eth·moid recess
| \ ˌsfē-nō-ˌeth-ˌmȯid-
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variants:
or sphenoethmoidal recess \ -ˌmȯid-ᵊl-
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Medical Definition of sphenoethmoid recess
: a small space between the sphenoid bone and the superior nasal concha into which the sphenoid sinus opens