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sphe·no·pa·ri·etal sinus | \ ˌsfē-nō-pə-ˈrī-ət-ᵊl- 
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\Medical Definition of sphenoparietal sinus
: a venous sinus of the dura mater on each side of the cranium arising at a meningeal vein near the apex of the lesser wing of the sphenoid bone and draining into the anterior part of the cavernous sinus
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