The era, starting in the mid-1940s, during which nuclear energy was developed, and in which it was thought that all energy would be provided by such sources.

(physics) any device that converts the energy of particles emitted from atomic nuclei into electrical energy

Alternative spelling of subatomic

Alternative spelling of subatomic

An extremely accurate reference clock whose operation is based on an atomic process, typically the frequency of electromagnetic radiation associated with a specified energy-level transition in an element such as cesium.

A nuclear weapon.

(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 atomic number

plural of atomic winter