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subarachnoid

American

[suhb-uh-rak-noid] / ˌsʌb əˈræk nɔɪd /

adjective

Anatomy.

of, relating to, or situated below the arachnoid membrane.

Etymology

Origin of subarachnoid

First recorded in 1830–40; sub- + arachnoid

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

subarachnoid

The Mayo Clinic says a subarachnoid hemorrhage is a type of stroke that involves bleeding in the space between the brain and the tissues that cover the brain.

From Los Angeles Times ● Oct. 14, 2026

One scenario described the symptoms of a stroke causing bleeding on the brain called a subarachnoid haemorrhage.

From BBC ● Apr. 18, 2026

Doctors found that he had suffered a subarachnoid hemorrhage resulting from a ruptured brain aneurysm.

From Slate ● Dec. 8, 2025

The brain produces around 500 mL of this fluid per day, which is drained from the subarachnoid space.

From Science Daily ● Jan. 26, 2024

The blood may escape through the pia mater into the subarachnoid cavity, and large clots be formed.

From Special Report on Diseases of the Horse by Charles B. Michener

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023