Definition of chemical adjective from the Oxford Advanced Learner's Dictionary

        

    chemical

     adjective
    adjective
    BrE BrE//ˈkemɪkl//
     
    ; NAmE NAmE//ˈkemɪkl//
     
     
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  1. 1  connected with chemistry a chemical element the chemical industry
  2. 2  produced by or using processes which involve changes to atoms or molecules chemical reactions/processes
  3. 3using or connected with chemicals a chemical toilet Chemical treatment with chlorine provides some protection against contamination.
  4. Word Origin late 16th cent.: from French chimique or modern Latin chimicus, chymicus, from medieval Latin alchymicus, from alchimia, from Arabic al-kīmiyā', from al ‘the’ + kīmiyā' (from Greek khēmia, khēmeia ‘art of transmuting metals’).
See the Oxford Advanced American Dictionary entry: chemical