Search Result for "subdural": 
Wordnet 3.0

ADJECTIVE (1)

1. below the dura mater but above the arachnoid membrane of the meninges; 



The Collaborative International Dictionary of English v.0.48:

Subdural \Sub*du"ral\, a. (Anat.)
   Situated under the dura mater, or between the dura mater and
   the arachnoid membrane.
   [1913 Webster]


WordNet (r) 3.0 (2006):

subdural
    adj 1: below the dura mater but above the arachnoid membrane of
           the meninges