atomism -
(chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles; "the ancient Greek philosophers Democritus and Epicurus held atomic theories of the universe"
theory a belief that can guide behavior; "the architect has a theory that more is less"; "they killed him on the theory that dead men tell no tales"
chemical science,
chemistry the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
atomism -
(psychology) a theory that reduces all mental phenomena to simple elements (sensations and feelings) that form complex ideas by association
scientific theory a theory that explains scientific observations; "scientific theories must be falsifiable"
