arachnoid definition

  • adjective:
    • Anatomy Of or regarding a delicate membrane enclosing the back and mind.
    • Of, concerning, or resembling arachnids.
    • Covered with or composed of slim, soft, entangled hairs or materials resembling those of a cobweb or spider's internet.
    • concerning spiders.
    • associated with or resembling spider webs.
    • Relating to the arachnoid mater, the center layer of the meninges, the three membranes that protect mental performance.
    • Resembling a spider's web; cobweblike.
    • Pertaining to a thin membrane layer of brain and back, involving the dura mater and pia mater.
    • Covered with, or made up of, soft, loose hairs or fibers, in order to look like a cobweb; cobwebby.
    • associated with or resembling a part of the class Arachnida
  • noun:
    • See arachnid.
    • physiology A delicate membrane that encloses the spinal cord and brain and lies amongst the pia mater and dura mater.
    • An arachnid
    • The arachnoid mater, the center level for the meninges, the 3 membranes that protect the brain
    • A round network of fractures in the crust of Venus
    • The arachnoid membrane.
    • one of many Arachnoidea.
    • a type of fossil madrepore.
    • In anatomy, the serous membrane enveloping the brain and spinal cord; the middle among three cerebrospinal meninges, between your dura mater together with pia mater.
    • a vintage and disused name of the hyaline or hyaloid membrane inside the eyeball, particularly of that percentage of it which plays a part in form the pill associated with crystalline lens.
    • air-breathing arthropods described as easy eyes and four sets of feet
    • the middle of the 3 meninges
  • others:
    • Of or regarding the Arachnida; arachnidan.
    • Like or likened to a cobweb: applied, in anatomy— to the arachnoid of the brain (see II.);
    • into hyaloid membrane or arachnoid associated with the eye (see II.).

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