living or growing partly on land, partly in water.
living or growing partly in water and partly on land
of or relating to conditions, existence, or activities under water
adjective 1. existing or situated under water; underwater. 2. occurring or performed under water. 3. used under water. adjective 1. occurring, appearing, formed, or used under water subaqueous (sŭb-ā’kwē-əs) Found or occurring underwater. Formed or adapted for underwater use or operation.
[suhb-uh-rak-noid] /ˌsʌb əˈræk nɔɪd/ adjective, Anatomy. 1. 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.