atomisms

1. (psychology) a theory that reduces all mental phenomena to simple elements (sensations and feelings) that form complex ideas by associationSynonyms: atomism

2. (chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particlesExamples: "the ancient Greek philosophers Democritus and Epicurus held atomic theories of the universe"Synonyms: atomic theory, atomism, atomist theory, atomistic theoryAntonyms: holism