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Definition of atomic adjective from the Oxford Advanced American Dictionary

     

    atomic

     adjective
    adjective
    NAmE//əˈtɑmɪk//
     
    [usually before noun]
     
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  1. 1connected with atoms or an atom atomic structure
  2. 2 connected with weapons that use atomic energy the atomic bomb the postwar atomic program
See the Oxford Advanced Learner's Dictionary entry: atomic