hydrocephalus

https://doi.org/10.1351/goldbook.10815
Accumulation of excess cerebrospinal fluid within the ventricles of the brain; head enlargement and brain damage may occur.
Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 765 [Terms] [Paper]