sphenoparietal sinus

noun

sphe·​no·​pa·​ri·​etal sinus ˌsfē-nō-pə-ˈrī-ət-ᵊl- 

: 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