Arachnoidea

Ar`ach·noid'e·a noun plural [ New Latin ] (Zoology) Same as Arachnida .
Found on http://www.encyclo.co.uk/webster/A/113

Arachnoidea

• (n. pl.) Same as Arachnida.
Found on http://thinkexist.com/dictionary/meaning/arachnoidea/

arachnoidea

arachnoidea, arachnoidal The middle of the three layers of the meninges covering the brain and spinal cord. Its smooth external sukrface is closely applied to the dukra mater, while the inner roughened surface is separated from the pia mater by the subarachnoid space. In some locations the space is crossed by fine trabeculae.
Found on http://www.wordinfo.info/words/index/info/view_unit/172/2
No exact match found