Arachnoid Definition

ə-răknoid
adjective
Designating the middle of three membranes covering the brain and the spinal cord.
Webster's New World
Covered with or consisting of soft, fine hairs or fibers.
Webster's New World
Of or like an arachnid.
Webster's New World
Of or relating to a delicate membrane enclosing the spinal cord and brain.
American Heritage Medicine
Of, relating to, or resembling arachnids.
American Heritage Medicine
Synonyms:
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noun
The arachnoid membrane.
Webster's New World
An arachnid.
Webster's New World
An arachnid.
American Heritage Medicine
A delicate membrane that encloses the spinal cord and brain and lies between the pia mater and dura mater.
American Heritage Medicine

(biology) An arachnid.

Wiktionary
Synonyms:
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other
The delicate membrane that encloses the spinal cord and brain and lies between the pia mater and dura mater.
American Heritage Science

Other Word Forms of Arachnoid

Noun

Singular:
arachnoid
Plural:
arachnoids

Origin of Arachnoid

  • New Latin arachnoīdēs from Greek arakhnoeidēs cobweblike arakhnē spider -oeidēs -oid

    From American Heritage Dictionary of the English Language, 5th Edition

  • Ancient Greek ἀράχνη (arakhnē, “spider”) + -oid

    From Wiktionary

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