from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The space between the arachnoid mater and the pia mater that surround the brain and spinal cord.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a space in the meninges beneath the arachnoid membrane and above the pia mater that contains the cerebrospinal fluid
Sorry, no etymologies found.