sub·​arach·​noid | \ ˌsəb-ə-ˈrak-ˌnȯid How to pronounce subarachnoid (audio) \
variants: or less commonly subarachnoidal \ ˌsəb-​ə-​rak-​ˈnȯi-​dᵊl How to pronounce subarachnoid (audio) \

Definition of subarachnoid

: of, relating to, occurring, or situated under the arachnoid membrane subarachnoid hemorrhage

Examples of subarachnoid in a Sentence

Recent Examples on the Web Edwards had suffered a subarachnoid hemorrhage, which is bleeding from a vein, unlike a stroke or aneurysm, which involves a torn or blocked artery. Diane Bell Columnist, San Diego Union-Tribune, 30 Oct. 2021 The official diagnosis was subarachnoid hemorrhage and subdural hematoma — bleeding and the pooling of blood on the surface of the brain. John Branch, New York Times, 7 Oct. 2021 The cause of death was subarachnoid hemorrhage of the brain. John Diedrich, Milwaukee Journal Sentinel, 15 Nov. 2014 A few days later, he was struck by a subarachnoid hemorrhage – bleeding in his brain stem that could have proved fatal. Darlene Aderoju,, 5 Dec. 2019 These aneurysms usually happen in the space between the brain and thin tissues covering the brain, which is known as a subarachnoid hemorrhage. Korin Miller, SELF, 22 Mar. 2019 At the hospital, Clarke was diagnosed with a subarachnoid hemorrhage (SAH)—a type of stroke and the neurological term for a ruptured aneurysm. Macaela Mackenzie, Glamour, 22 Mar. 2019 In 2005, Sharon suffered a subarachnoid hemorrhage which was mishandled by a major local hospital, forcing her into early retirement., 8 July 2018 Michael Kirkham Date: June 28, 2010 Age: 30 Location: Aiken, South Carolina Classification: Professional Record: 0-1 Summary: An autopsy showed Kirkham died from a subarachnoid hemorrhage, or bleeding between the brain and the tissues covering it. Drew Hill, The Courier-Journal, 21 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'subarachnoid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of subarachnoid

1843, in the meaning defined above

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The first known use of subarachnoid was in 1843

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Last Updated

5 Nov 2021

Cite this Entry

“Subarachnoid.” Dictionary, Merriam-Webster, Accessed 4 Dec. 2021.

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More Definitions for subarachnoid


sub·​arach·​noid | \ ˌsəb-ə-ˈrak-ˌnȯid How to pronounce subarachnoid (audio) \
variants: also subarachnoidal \ -​rak-​ˈnȯid-​ᵊl How to pronounce subarachnoid (audio) \

Medical Definition of subarachnoid

1 : situated or occurring under the arachnoid membrane subarachnoid hemorrhage
2 : of, relating to, or involving the subarachnoid space and the fluid within it subarachnoid meningitis


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