Definition of trace element noun from the Oxford Advanced Learner's Dictionary

     

    trace element

     noun
    noun
    BrE
     
    ; NAmE
     
     
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  1. 1a chemical substance that is found in very small amounts
  2. 2a chemical substance that living things, especially plants, need only in very small amounts to be able to grow well
See the Oxford Advanced American Dictionary entry: trace element