1. 
   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 memb...
   Found op http://www.mondofacto.com/facts/dictionary?pia-arachnoid
   
   
2. 
   pia-arachnoid
   (pi″ә-ә-rak´noid) the pia mater and arachnoid considered together as one functional unit; the leptomeninges.
   Found op http://www.encyclo.co.uk/local/21001
   
   
3. 
   pia-arachnoid
   Type: Term Pronunciation: pī′ă-ă-rak′noyd, pē′ă- Synonyms: leptomeninx
   Found op http://www.medilexicon.com/medicaldictionary.php?t=68864
   
   

Tip: double click on a word to show its meaning.