Definitions for arachnoidəˈræk nɔɪd

This page provides all possible meanings and translations of the word arachnoid

Random House Webster's College Dictionary

a•rach•noidəˈræk nɔɪd(adj.)

  1. of or belonging to the arachnids.

    Category: Entomology

  2. of or pertaining to the arachnoid.

    Category: Anatomy

  3. Bot. formed of or covered with long, delicate hairs or fibers.

    Category: Botany

  4. (n.)the serous membrane forming the middle of the three coverings of the brain and spinal cord.

    Category: Anatomy

    Ref: Compare dura mater , meninges , pia mater .

Origin of arachnoid:

1745–55; < NL arachnoīdes < Gk arachnoeidḗs cobweblike. See arachnid , -oid

Princeton's WordNet

  1. arachnoid, arachnoid membrane(noun)

    the middle of the 3 meninges

  2. arachnid, arachnoid(adj)

    air-breathing arthropods characterized by simple eyes and four pairs of legs

  3. arachnoid, arachnidian, spidery, spiderlike, spiderly(adj)

    relating to or resembling a member of the class Arachnida


  1. arachnoid(Noun)

    An arachnid

  2. arachnoid(Noun)

    The arachnoid mater, the middle layer of the meninges, the three membranes that protect the brain

  3. arachnoid(Noun)

    A round network of fractures in the crust of Venus

  4. arachnoid(Adjective)

    Relating to spiders.

  5. arachnoid(Adjective)

    Relating to or resembling spider webs.

  6. arachnoid(Adjective)

    Relating to the arachnoid mater, the middle layer of the meninges, the three membranes that protect the brain.

  7. Origin: ἀράχνη + -oid

Webster Dictionary

  1. Arachnoid(adj)

    resembling a spider's web; cobweblike

  2. Arachnoid(adj)

    pertaining to a thin membrane of the brain and spinal cord, between the dura mater and pia mater

  3. Arachnoid(adj)

    covered with, or composed of, soft, loose hairs or fibers, so as to resemble a cobweb; cobwebby

  4. Arachnoid(noun)

    the arachnoid membrane

  5. Arachnoid(noun)

    one of the Arachnoidea


  1. Arachnoid

    In astrogeology, an arachnoid is a large structure of unknown origin, and they have been found only on the surface of the planet Venus. Arachnoids get their name from their resemblance to spider webs. They appear as concentric ovals surrounded by a complex network of fractures, and can span 200 kilometers. Over thirty arachnoids have been identified on Venus, so far. The arachnoid might be a strange relative to the volcano, but possibly different arachnoids are formed by different processes.

U.S. National Library of Medicine

  1. Arachnoid

    A delicate membrane enveloping the brain and spinal cord. It lies between the PIA MATER and the DURA MATER. It is separated from the pia mater by the subarachnoid cavity which is filled with CEREBROSPINAL FLUID.


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