1. Of or pertaining to atoms.
2. Extremely minute; tiny. Atomic philosophy, or Doctrine of atoms, a system which assuming that atoms are endued with
gravity and
motion accounted
thus for the
origin and
formation of all things. This
philosophy was
first broached by Leucippus, was developed by Democritus, and afterward ameliorate by Epicurus, and hence is sometimes denominated the Epicurean philosophy.
Atomic theory, or the Doctrine of definite proportions, the weight of the atom of an element as compared with the weight of the atom of hydrogen, taken as a standard.
Origin: Cf. F. Atomique.
Source: Websters Vocabulary