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Definition of Sigmoid sinus
1. Noun. An S-shaped dural sinus on the temporal and occipital bones.
Medical Definition of Sigmoid sinus
1. The S-shaped dural venous sinus lying deep to the mastoid process of the temporal bone and immediately posterior to the petrous temporal bone; it is continuous with the transverse sinus and empties into the internal jugular vein as it passes through the jugular foramen. Synonym: sinus sigmoideus. (05 Mar 2000)
Lexicographical Neighbors of Sigmoid Sinus
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