different between arachnoid vs arachnoiditis

English

From Ancient Greek ?????? (arákhn?, “spider”) + -oid.

arachnoid (not comparable)

Relating to or resembling spiders.
Relating to or resembling spider webs.
(anatomy) Relating to the arachnoid mater, the middle layer of the meninges, the three membranes that protect the brain.

arachnoid (plural arachnoids)

(biology) An arachnid
(physiology) The arachnoid mater, the middle layer of the meninges, the three membranes that protect the brain
(astronomy) A round network of fractures in the crust of Venus

arachnoid +? -itis

arachnoiditis

(pathology) A neuropathic disease caused by the inflammation of the arachnoid, one of the membranes that surround and protect the nerves of the spinal cord.

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