atomist theory

Noun
  1. (chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles (synset 106112083)
    "the ancient Greek philosophers Democritus and Epicurus held atomic theories of the universe"
    referred to in: chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
    is a type of: theory - a well-substantiated explanation of some aspect of the natural world; an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena
    same as: atomic theory, atomism, atomistic theory

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