subarachnoid space(redirected from Subarachnoid cavity)
Also found in: Thesaurus, Medical, Encyclopedia.
The space between the arachnoid membrane and pia mater that is filled with cerebrospinal fluid and contains the large blood vessels that supply the brain and spinal cord.
Switch to new thesaurus
|Noun||1.||subarachnoid space - a space in the meninges beneath the arachnoid membrane and above the pia mater that contains the cerebrospinal fluid|
space - an empty area (usually bounded in some way between things); "the architect left space in front of the building"; "they stopped at an open space in the jungle"; "the space between his teeth"