leptomeninges

Medical Dictionary

leptomeninges lep·to·me·nin·ges (lěp'tō-mə-nĭn'jēz)
n.
The pia mater and arachnoid considered as one unit enveloping the brain and spinal cord. Also called pia-arachnoid.


lep'to·me·nin'ge·al (-jē-əl) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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WordNet
leptomeninges

noun
the two innermost layers of the meninges; cerebrospinal fluid circulates between these innermost layers 
WordNet® 3.0, © 2006 by Princeton University.
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