WordReference Random House Learner's Dictionary of American English © 2017
a•tom•ic /əˈtɑmɪk/USA pronunciation   adj. [before a noun]
  1. Physicsof, relating to, resulting from, or using atoms, atomic energy, or atomic bombs.
  2. Chemistryexisting as free, uncombined atoms: atomic hydrogen.
a•tom•i•cal•ly, adv. See -tom-.

WordReference Random House Unabridged Dictionary of American English © 2017
a•tom•ic  (ə tomik),USA pronunciation adj. 
  1. Physicsof, pertaining to, resulting from, or using atoms, atomic energy, or atomic bombs:an atomic explosion.
  2. Physicspropelled or driven by atomic energy:an atomic submarine.
  3. Chemistryexisting as free, uncombined atoms.
  4. extremely minute.
Also,  a•tomi•cal.  a•tomi•cal•ly, adv. 
  • atom + -ic 1670–80


Collins Concise English Dictionary © HarperCollins Publishers::

atomic /əˈtɒmɪk/ adj
  1. of, using, or characterized by atomic bombs or atomic energy: atomic warfare
  2. of, related to, or comprising atoms: atomic hydrogen

aˈtomically adv



'atomic' also found in these entries:
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