• WordNet 3.6
    • adj subdural below the dura mater but above the arachnoid membrane of the meninges
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Webster's Revised Unabridged Dictionary
    • a Subdural (Anat) Situated under the dura mater, or between the dura mater and the arachnoid membrane.
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Century Dictionary and Cyclopedia
    • subdural Situated beneath the dura mater, between the dura mater and the arachnoid.
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In literature:

I think you'd find post-mortem evidence, likely subdural hemorrhage.
"The Trial of Callista Blake" by Edgar Pangborn

In news:

Subdural empyema is the rarest complication of otitis media, and it is very rarely seen in an interhemispheric setting.
As pointed out by Ajit Kashyap and colleagues, and alluded to by us in the Seminar, other disease processes involving the dura mater or subdural space can give a meningioma-like neuroradiological appearance, with or without a tail sign.
How fighting in bars and two subdural hematomas led to the Angry Hand of God .
Among the latter are cerebral contusion, epidural hematoma, subdural hematoma, and intracerebral hematoma.
Subdural hematoma involving congenital arachnoid cyst.
Kernohan's phenomenon, resulting from a traumatic left acute subdural hematoma.
How fighting in bars and two subdural hematomas led to the Angry Hand of God.
Legendary show jumper Frank Chapot is recovering well from brain surgery to repair a subdural hematoma on July 24.
Boots Randolph, legendary saxophone player and top-level Music Row session musician, died Tuesday, July 3, in a Nashville hospital at age 80 after suffering a subdural hematoma.