at·om·is·tic 
(ăt′ə-mĭstĭk) also at·om·is·ti·cal (-tĭ-kəl)
(ăt′ə-mĭstĭk) also at·om·is·ti·cal (-tĭ-kəl)adj.
1. Of or having to do with atoms or atomism.
2. Consisting of many separate, often disparate elements: an atomistic culture.
at′om·isti·cal·ly adv.