Definition that contains radioactive material
- containment (physics) a system designed to prevent the accidental release of radioactive material from a reactor
- contaminate make radioactive by adding radioactive material
- nuclear medicine the branch of medicine that uses radioactive materials either to image a patient's body or to destroy diseased cells
- nuclear terrorism the use of a nuclear device by a terrorist organization to cause massive devastation or the use (or threat of use) of fissionable radioactive materials
- radioactive dating measurement of the amount of radioactive material (usually carbon 14) that an object contains; can be used to estimate the age of the object
- radioactive waste useless radioactive materials that are left after some laboratory or commercial process is completed