Definition of chemical adjective from the Oxford Advanced American Dictionary

        

    chemical

     adjective
    adjective
    NAmE//ˈkɛmɪkl//
     
     
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  1. 1connected with chemistry a chemical element the chemical industry
  2. 2produced by or using processes that involve changes to atoms or molecules chemical reactions/processes
  3. NAmE//ˈkɛmɪkli//
     
    adverb The raw sewage is chemically treated.
See the Oxford Advanced Learner's Dictionary entry: chemical