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English definition of “chemical”

chemical

noun [C]     /ˈkem.ɪ.kəl/
B2 any basic substance that is used in or produced by a reaction involving changes to atoms or molecules : The government has pledged to reduce the amount of chemicals used in food production . Each year , factories release millions of tons of toxic (= poisonous ) chemicals into the atmosphere .Chemistry - general words
(Definition of chemical noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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