sigmoid sinus

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Definitions from WordNet

Noun sigmoid sinus has 1 sense

sigmoid sinus, sinus sigmoideus - an S-shaped dural sinus on the temporal and occipital bones
--₁ is a kind of venous sinus, sinus

Definitions from the Web

Sigmoid Sinus

Definition:

The sigmoid sinus is a major venous sinus located in the brain. It lies at the base of the skull, within the sigmoid groove of the temporal bone. It receives blood from several veins and drains into the internal jugular vein.

Sample sentences:

The sigmoid sinus plays a crucial role in the drainage of blood from the brain.
A blockage in the sigmoid sinus can lead to increased intracranial pressure.
During surgery, the surgeon carefully avoided damaging the sigmoid sinus.