Definitions for "Toxic chemical"
Chemical that is fatal to humans in low doses or fatal to more than 50% of test animals at stated concentrations. Most are neurotoxins, which attack nerve cells. See carcinogen, hazardous chemical, mutagen, teratogen.
Any chemical that can harm or poison a living organism including human beings.
Substances that can cause severe illness, poisoning, birth defects, disease, or death when ingested, inhaled, or absorbed by living organisms.
See SN toxic substance