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Medical Definition of Dural sheath
1. An extension of the dura mater that ensheathes the roots of spinal nerves or, more particularly, the vagina externa nervi optici. (05 Mar 2000)
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1. An extension of the dura mater that ensheathes the roots of spinal nerves or, more particularly, the vagina externa nervi optici. (05 Mar 2000)