arachnoid

[ uh-rak-noid ]

/ əˈræk nɔɪd /

adjective

resembling a spider's web.

of or belonging to the arachnids.

Anatomy. of or relating to the arachnoid membrane.

Botany. formed of or covered with long, delicate hairs or fibers.

noun

an arachnid.

Anatomy. the serous membrane forming the middle of the three coverings of the brain and spinal cord.

Compare dura mater, meninges, pia mater.

Origin of arachnoid

1745–55; <New Latin arachnoīdes<Greek arachnoeidḗs cobweblike. See arachnid, -oid

Words nearby arachnoid

Arachne, arachnid, Arachnida, arachnidism, arachnodactyly, arachnoid, arachnoid cyst, arachnoid granulation, arachnoiditis, arachnoid membrane, arachnoid villus

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for arachnoid

Arachnoid, said of the veil when it is cobwebby, that is, formed of loose threads.
Studies of American Fungi. Mushrooms, Edible, Poisonous, etc.|George Francis Atkinson
All the ventricles of the brain were dilated with serum, and there was a good deal of effusion into the arachnoid and pia mater.
On the origin of inflammation of the veins|Henry Lee
The lymph was purely basal, solely on the arachnoid, not in the fissures or sulci.
A History of Epidemics in Britain, Volume II (of 2)|Charles Creighton
On examination pus was found between the arachnoid and the pia mater.
A System of Practical Medicine by American Authors, Vol. I|Various

In a case in Dublin,47 there was no meningeal lesion except in a "few dark spots like sanguineous effusion under the arachnoid."
A System of Practical Medicine by American Authors, Vol. I|Various

British Dictionary definitions for arachnoid

arachnoid

/ (əˈræknɔɪd) /

noun

the middle of the three membranes that cover the brain and spinal cordSee meninges

another name for arachnid

adjective

of or relating to the middle of the three meninges

botany consisting of or covered with soft fine hairs or fibres

of or relating to the arachnids

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for arachnoid

arachnoid

[ ə-răk′noid′ ]

adj.

Resembling a cobweb. Used of the arachnoid membrane covering the brain and spinal cord.

Scientific definitions for arachnoid

arachnoid

[ ə-răk′noid′ ]

The delicate membrane that encloses the spinal cord and brain and lies between the pia mater and dura mater.

单词	arachnoid
释义	arachnoid [ uh-rak-noid ] / əˈræk nɔɪd / adjective resembling a spider's web. of or belonging to the arachnids. Anatomy. of or relating to the arachnoid membrane. Botany. formed of or covered with long, delicate hairs or fibers. noun an arachnid. Anatomy. the serous membrane forming the middle of the three coverings of the brain and spinal cord. Compare dura mater, meninges, pia mater. Origin of arachnoid 1745–55; <New Latin arachnoīdes<Greek arachnoeidḗs cobweblike. See arachnid, -oid Words nearby arachnoid Arachne, arachnid, Arachnida, arachnidism, arachnodactyly, arachnoid, arachnoid cyst, arachnoid granulation, arachnoiditis, arachnoid membrane, arachnoid villus Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for arachnoid Arachnoid, said of the veil when it is cobwebby, that is, formed of loose threads. Studies of American Fungi. Mushrooms, Edible, Poisonous, etc.\|George Francis Atkinson All the ventricles of the brain were dilated with serum, and there was a good deal of effusion into the arachnoid and pia mater. On the origin of inflammation of the veins\|Henry Lee The lymph was purely basal, solely on the arachnoid, not in the fissures or sulci. A History of Epidemics in Britain, Volume II (of 2)\|Charles Creighton On examination pus was found between the arachnoid and the pia mater. A System of Practical Medicine by American Authors, Vol. I\|Various In a case in Dublin,47 there was no meningeal lesion except in a "few dark spots like sanguineous effusion under the arachnoid." A System of Practical Medicine by American Authors, Vol. I\|Various British Dictionary definitions for arachnoid arachnoid / (əˈræknɔɪd) / noun the middle of the three membranes that cover the brain and spinal cordSee meninges another name for arachnid adjective of or relating to the middle of the three meninges botany consisting of or covered with soft fine hairs or fibres of or relating to the arachnids Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for arachnoid arachnoid [ ə-răk′noid′ ] adj. Resembling a cobweb. Used of the arachnoid membrane covering the brain and spinal cord. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for arachnoid arachnoid [ ə-răk′noid′ ] The delicate membrane that encloses the spinal cord and brain and lies between the pia mater and dura mater. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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