cavernous sinus

== English == === Noun === cavernous sinus (plural cavernous sinuses) (anatomy) Either of a pair of large venous sinuses situated in a groove at the side of the body of the sphenoid bone in the cranial cavity and opening behind into the petrosal sinuses. ==== Translations ==== === References === “cavernous sinus”, in Merriam-Webster.com Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.