Dictionary![]() ![]() a•tom•icPronunciation: (u-tom'ik), [key] —adj. 1. of, pertaining to, resulting from, or using atoms, atomic energy, or atomic bombs: an atomic explosion. 2. propelled or driven by atomic energy: an atomic submarine. 3. Chem.existing as free, uncombined atoms. 4. extremely minute. Also,a•tom'i•cal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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