straight sinus n.
An unpaired sinus of the dura mater in the posterior part of the falx cerebri. Also called tentorial sinus.
|an unpaired sinus of the dura mater|
|a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|