subarachnoid hemorrhage

https://doi.org/10.1351/goldbook.12101
Loss of blood into the space between the arachnoid membrane and the pia mater.
Source:
PAC, 2015, 87, 841. (IUPAC Glossary of terms used in neurotoxicology (IUPAC Recommendations 2015)) on page 908 [Terms] [Paper]