sinus of Morgagni
noun
sinus of Mor·ga·gni
| \ -mȯr-ˈgän-yē
\
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Medical Definition of sinus of Morgagni
: a space at the upper back part of each side of the pharynx where the walls are deficient in muscular fibers between the upper border of the superior constrictor and the base of the skull and closed only by the aponeurosis of the pharynx