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.

(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.

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

(anatomy) arachnoid