Atomist Definition
    noun
  
 An adherent of atomism; one who believes matter is composed of elementary indivisible particles.
Wiktionary 
An adherent of the atomic theory.
 Wiktionary 
Other Word Forms of Atomist
Noun
Singular:
 atomistPlural:
 atomistsOrigin of Atomist
-  From atom + -ist. From Wiktionary 
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