Atomic

The general meaning of "atomic" is "irreducible". That is, reduced to the
smallest possible part. It has more specific meanings in several contexts:

   * In chemistry, chemical atoms are grouped by type in the periodic table
     and consist of particles as described by particle physics.
   * In computer science, an atomic operation is one that cannot be
     subdivided. Or more specifically, an operation that always completes as
     a whole, or doesn't complete at all. See atomic (computer science).

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