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chemical noun
/ˈkem.ɪ.kəl/ n [C] Definition
any basic substance which 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 tonnes of toxic (= poisonous) chemicals into the atmosphere.
(Definition of chemical noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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