- Resembling a spider's web; cobweblike. - Pertaining to a thin membrane of the brain and spinal
cord, between the dura mater and pia mater. - Covered with, or composed of, soft, loose hairs or
fibers, so as to resemble a cobweb; cobwebby.
2 . Arachnoid
[ n.]
- The arachnoid membrane. - One of the Arachnoidea.