- atomism - (psychology) a theory that reduces all mental phenomena to simple elements (sensations and feelings) that form complex ideas by association
--1 is a kind of scientific theory
- atomism, atomic theory, atomist theory, atomistic theory - (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"
--2 is a kind of theory
Antonyms: holism, holistic theory
- atomism, atomic theory, atomist theory, atomistic theory - (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"