Source : Webster's Revised Unabridged Dictionary (1913)

Atomistic \At`om*is"tic\, a.
   Of or pertaining to atoms; relating to atomism. [R.]

         It is the object of the mechanical atomistic philosophy
         to confound synthesis with synartesis.   --Coleridge.

Source : WordNet®

atomistic
     adj : divided into separate and often disparate elements [syn: {atomistical}]
           [ant: {holistic}]