neurotoxin

https://doi.org/10.1351/goldbook.11952
Any substance that has the potential to damage the nervous system.
Note: In the narrower sense, neurotoxins are of biological origin, like toxins in general. However, the term neurotoxin is also in general use for non-biological substances.
Source:
PAC, 2015, 87, 841. (IUPAC Glossary of terms used in neurotoxicology (IUPAC Recommendations 2015)) on page 890 [Terms] [Paper]