fallout(redirected from fallouts)
Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.
Related to fallouts: fallouts
Etymology: AS, feallan, to fall, ut
the deposition of radioactive debris after a nuclear explosion. The waste products of an atmospheric explosion of an atomic bomb may travel thousands of miles in the atmosphere and be deposited over a large geographic area.
Settling of radioactive molecules from the atmosphere after their release into the air following an explosion or radiation accident.
the settling to the earth's surface of radioactive fission products from the atmosphere after a nuclear explosion.