(pathology) A neuropathic disease caused by the inflammation of the arachnoid, one of the membranes that surround and protect the nerves of the spinal cord.

Relating to or resembling spider webs; covered with or composed of soft loose hairs or fibers. / (anatomy) Relating to the arachnoid mater.

(neuroanatomy) Ellipsis of arachnoid mater.. / (astronomy) A round network of fractures in the crust of Venus.

(arachnology, relational) Relating to or resembling spiders.

An arachnid.

plural of arachnoid

(anatomy) Pertaining to the arachnoid mater; arachnoid.

(anatomy) The middle layer of the meninges; a membrane that protects the brain and spinal cord below the dura mater and above the subarachnoid space and the pia mater.

plural of arachnoid mater