atomic theory meaning and definition

ATOMIC THEORY noun

Definition of atomic theory (noun)

1. a theory of the structure of the atom
2. (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"
   • synonyms: atomism, atomist theory, atomistic theory
   • antonym: holism