filum durae matris spinalis

[ durē mātrĭs spī-nālĭs ]

n.

The termination of the spinal dura mater, surrounding the terminal filum of the cord and attached to the deep dorsal sacrococcygeal ligament.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.