(physics) The theory that all gross matter is composed of atoms. / (physics) Any of several theories that explain the structure of the atom, and of subatomic particles.

plural of atomic bomb

plural of Rydberg atom

plural of atomic number

plural of atomic winter

plural of atom bomb

Alternative letter-case form of Atomic Age

(philosophy) The doctrine that the world consists of ultimate logical "facts" (or "atoms") that cannot be broken down any further.

(informal) A particle accelerator.

Time, as measured by an atomic clock.