sinus of the dura mater
noun
: any of numerous venous channels (as the sagittal sinuses, straight sinus, and transverse sinuses) that are situated between the two layers of the dura mater, that have no valves, and that drain blood from the brain and the bones forming the cranium and empty it into the internal jugular vein
called also dural sinus
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“Sinus of the dura mater.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/sinus%20of%20the%20dura%20mater. Accessed 26 Nov. 2024.
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