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The following 3 entries include the term sinus of.
sinus of Morgagni
noun: 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
sinus of the dura mater
noun: any of numerous venous channels (as the sagittal sinuses, straight sinus, and transverse sinuses) that are situated between the two layers of the dura mater, that have no valves, and that drain blood from the brain and the bones forming the cranium and empty it into the internal jugular vein
sinus of Valsalva
noun: any one of the pouches of the aorta and pulmonary artery which are located behind the flaps of the semilunar valves and into which the blood in its regurgitation toward the heart enters and thereby closes the valves
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- Before we went to her house, Hannah told us her aunt was a flibbertigibbet.
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Merriam-Webster unabridged
