arachnoid

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arachnoid

[ə′rak‚nȯid]
(anatomy)
A membrane that covers the brain and spinal cord and lies between the pia mater and dura mater.
(botany)
Of cobweblike appearance, caused by fine white hairs. Also known as araneose.
(invertebrate zoology)
Any invertebrate related to or resembling the Arachnida.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.