WordWeb Online

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";
   - atomism, atomist theory, atomistic theory

Derived forms: atomic theories

Type of: scientific theory, theory

Part of: atomic physics, nuclear physics, nucleonics

Encyclopedia: Atomic theory