Dictionary
du'ra ma'ter
Pronunciation: (mā'tur), [key] Anat.
the tough, fibrous membrane forming the outermost of the three coverings of the brain and spinal cord. Also called
dura. Cf.
arachnoid (def. 6),
pia mater. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.