arachnoid
noun
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An arachnid
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The arachnoid mater, the middle layer of the meninges, the three membranes that protect the brain
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A round network of fractures in the crust of Venus
adjective
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Relating to or resembling spiders.
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Relating to or resembling spider webs.
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Relating to the arachnoid mater, the middle layer of the meninges, the three membranes that protect the brain.