pia-arachnoid

Synonym for leptomeninges ... The two delicate layers of the meninges, the arachnoid mater and pia mater (vs. The tough pachymeninx or dura mater), considered together; by this concept, the arachnoid and pia are two parts of a single layer, much like the parietal and visceral layers of a serous membrane or bursa; although separated by the subarachn...
Found on http://www.mondofacto.com/facts/dictionary?pia-arachnoid

pia-arachnoid

(pi″ә-ә-rak´noid) the pia mater and arachnoid considered together as one functional unit; the leptomeninges.
Found on http://www.encyclo.co.uk/local/21001

pia-arachnoid

Type: Term Pronunciation: pī′ă-ă-rak′noyd, pē′ă- Synonyms: leptomeninx
Found on http://www.medilexicon.com/medicaldictionary.php?t=68864
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