| toxic | (adjective) of or relating to or caused by a toxin or poison | - |
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| toxicant | (adjective) having the qualities or effects of a poison | Synonyms: poisonous |
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| (noun) any substance that causes injury or illness or death of a living organism | Synonyms: poison, poisonous substance |
| toxicity | (noun) grave harmfulness or deadliness | Synonyms: perniciousness |
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| (noun) the degree to which something is poisonous | - |
| toxicognath | (noun) either of a pair of poison fangs in the modified front pair of legs of the centipede | - |
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| toxicologic | (adjective) of or relating to toxicology | Synonyms: toxicological |
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| toxicological | (adjective) of or relating to toxicology | Synonyms: toxicologic |
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| toxicologist | (noun) one who studies the nature and effects of poisons and their treatment | - |
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| toxicology | (noun) the branch of pharmacology that deals with the nature and effects and treatments of poisons | - |
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| toxin | (noun) a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species | - |
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