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===Meaning===
A [[toxic]] [[substance]] is one that is so poisonous it could kill an [[organism]].
===About Toxic Chemicals===
: Some [[chemical]]s are [[toxic]] in very small quantities so even a small amount could kill an [[organism]].
: Some '''toxins''' must be ingested to kill the [[organism]]. However, some can kill an [[organism]] if they are [[inhale]]d or if some of the [[chemical]] gets on their [[skin]].