arach·noid
ə-ˈrak-ˌnȯid 
1
: of or relating to a thin membrane of the brain and spinal cord that lies between the dura mater and the pia mater
2
: covered with or composed of soft loose hairs or fibers
: an arachnoid membrane
: resembling or related to the arachnids
Examples of arachnoid in a Sentence
Recent Examples on the Web
Lovia Gyarkye, The Hollywood Reporter, 31 May 2023
Kelly Smith, Star Tribune, 24 Mar. 2021
In 2018, Meyer retired from the Ohio State job, citing health concerns, including headaches related to a congenital arachnoid cyst.
—New York Times, 14 Jan. 2021
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Adjective
Since then, the arachnoid warrior (voiced by Shameik Moore) has grown into his powers and superhero responsibilities.
—Lovia Gyarkye, The Hollywood Reporter, 31 May 2023
Noun
At Children's Minnesota, Dr. Kyle Halvorson said arachnoid cysts are more commonly found in a patient's head, but rarely by the spinal column.
—Kelly Smith, Star Tribune, 24 Mar. 2021
In 2018, Meyer retired from the Ohio State job, citing health concerns, including headaches related to a congenital arachnoid cyst.
—New York Times, 14 Jan. 2021
Dictionary Entries Near arachnoid
Cite this Entry
“Arachnoid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/arachnoid. Accessed 1 Dec. 2024.
Copy CitationMedical Definition
arachnoid
1 of 2 noun
arach·noid
ə-ˈrak-ˌnȯid
: a thin membrane of the brain and spinal cord that lies between the dura mater and the pia mater
arachnoid
2 of 2 adjective
variants
also arachnoidal
: of or relating to the arachnoid
the arachnoid membrane
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