noun
poisonous substance; toxic substance
General term for any substance that is harmful or lethal to living organisms. Used in scientific, medical, and everyday contexts.
この工場から有毒物質が漏れた。
A toxic substance leaked from this factory.
有毒物質を含む食品は回収された。
Food products containing poisonous substances were recalled.
Compound of 有毒 (yūdoku, 'toxic, poisonous') + 物質 (busshitsu, 'substance, matter').