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

     

    atomic

     adjective
    adjective
    BrE BrE//əˈtɒmɪk//
     
    ; NAmE NAmE//əˈtɑːmɪk//
     
    [usually before noun] Molecules and matter
     
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  1. 1connected with atoms or an atom atomic structure See related entries: Molecules and matter
  2. 2related to the energy that is produced when atoms are split; related to weapons that use this energy atomic energy/power the atomic bomb the post-war atomic programme See related entries: Molecules and matter
  3. Word Origin late 17th cent.: from modern Latin atomicus, from atomus ‘indivisible’ from Greek atomos, based on a- ‘not’ + temnein ‘to cut’.
See the Oxford Advanced American Dictionary entry: atomic