Medical Definition of cavernous sinus
: 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
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“Cavernous sinus.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/cavernous%20sinus. Accessed 2 Jul. 2022.
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