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.

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

Shortly after finishing the first season of "Game of Thrones" in 2011, Clarke experienced a subarachnoid hemorrhage, a bleed in the space between the brain and surrounding membrane.

From Salon • Jul. 18, 2022

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 Michener, Charles B.

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