WordNet
straight sinus
n. an unpaired sinus of the dura mater [syn: tentorial sinus, sinus rectus]
Wikipedia
Straight sinus
The straight sinus, also known as tentorial sinus or the , is an area within the skull beneath the brain that receives venous blood. The straight sinus receives blood from the superior cerebellar veins and inferior sagittal sinus and drains into the confluence of sinuses.