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Definition of chemistry noun from the Oxford Advanced American Dictionary

      

    chemistry

     noun
    noun
    NAmE//ˈkɛməstri//
     
    [uncountable]
     
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  1. 1the scientific study of the structure of substances, how they react when they are combined or in contact with one another, and how they behave under different conditions a degree in chemistry the university's chemistry department inorganic/organic chemistry see also biochemistry
  2. 2(technology) the chemical structure and behavior of a particular substance the chemistry of copper We do not fully understand the chemistry of genes. The patient's blood chemistry was monitored regularly.
  3. 3 the relationship between two people, usually a strong sexual attraction sexual chemistry The chemistry just wasn't right.
See the Oxford Advanced Learner's Dictionary entry: chemistry