Wordnet 3.0
ADJECTIVE (1)
1.
of or relating to the dura mater;
The Collaborative International Dictionary of English v.0.48:
Dural \Du"ral\, a. (Anat.)
Pertaining to the dura, or dura mater.
[1913 Webster]
WordNet (r) 3.0 (2006):
dural
adj 1: of or relating to the dura mater