subarachnoid
/ˌsʌbəˈræknɔɪd/
adjective
- Relating to the space or region beneath the arachnoid membrane of the brain and spinal cord, which contains cerebrospinal fluid.
- Doctors use a lumbar puncture to sample fluid from the subarachnoid region.
- A subarachnoid hemorrhage is a medical emergency caused by bleeding in the brain.
- The subarachnoid space cushions the brain with fluid.