(physics, chemistry) Of or relating to atoms; composed of atoms; monatomic. / Employing or relating to nuclear energy or processes. / Infinitesimally small.

(computing) An atomic operation.

(uncountable) The quality or state of being atomic. / (chemistry) The number of atoms in a molecule.

With regard to atoms or atomic energy.

plural of atomicity

Archaic form of atomic.

plural of atomic

The study of physics at an atomic level.

(chemistry, physics) The smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.

An instrument for reducing a liquid to spray or vapor for disinfecting, cooling, medical use or perfume spraying.