A device, including a bomb or warhead, whose great explosive power derives from release of nuclear energy.
A weapon that derives its energy through the atomic reactions of either fission or fusion.
A weapon of good explosive power, eg an atomic bomb or a hydrogen bomb, which depends for some of the explosive energy in the release of power from within atomic nuclei by a nuclear effect. A fission weapon or a fusion tool. The definition of includes atomic shells for cannon.
a weapon of mass destruction whose explosive energy derives from a nuclear reaction