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arachnoid
(-no̵id′)
adjective
- Anat. designating the middle of three membranes covering the brain and the spinal cord
- Bot. covered with or consisting of soft, fine hairs or fibers
- Zool. of or like an arachnid
Origin: ModL arachnoides < Gr arachnoeidēs, like a cobweb < arachnē, spider (see arachnid) + -eidēs, -oid
noun
- Anat. the arachnoid membrane
- Zool. an arachnid
See arachnoid in American Heritage Dictionary 4
adjective
- Anatomy Of or relating to a delicate membrane enclosing the spinal cord and brain.
- Of, relating to, or resembling arachnids.
- Covered with or consisting of thin, soft, entangled hairs or fibers resembling those of a cobweb or spider's web.
- See arachnid.
- Anatomy A delicate membrane that encloses the spinal cord and brain and lies between the pia mater and dura mater.
Origin:
Origin: New Latin arachnoīdēs
Origin: , from Greek arakhnoeidēs, cobweblike
Origin: : arakhnē, spider
Origin: + -oeidēs, -oid
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