[suhb-uh-rak-noid] /ˌsʌb əˈræk nɔɪd/
of, relating to, or situated below the arachnoid membrane.
noun 1. spinal block. spinal block noun 1. spinal anesthesia. 2. obstruction of the flow of spinal fluid by blockage of the spinal canal. spinal block n. Pathological obstruction of the flow of cerebrospinal fluid in the spinal subarachnoid space. Spinal anesthesia. Not in technical use.
- Subarachnoid space
subarachnoid space sub·a·rach·noid space (sŭb’ə-rāk’noid’) n. 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.
adjective 1. of, pertaining to, similar to, or being the region immediately south of the Arctic Circle; subpolar. adjective 1. of or relating to latitudes immediately south of the Arctic Circle subarctic (sŭb’-ärk’tĭk, -är’tĭk) Relating to the geographic area just south of the Arctic Circle. The subarctic region is the coldest part of the North […]
noun 1. Aleutian Current. Aleutian Current noun 1. a current in the Pacific Ocean that flows eastward between latitudes 40° and 50° N.