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nounany adverse and unwanted secondary effect
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nounthe radioactive particles that settle to the ground after a nuclear explosion
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Definition that contains fallout
- fallout shelter a shelter to protect occupants from the fallout from an atomic bomb
- strontium 90 a radioactive isotope of strontium (with the mass number 90) that is present in the fallout from nuclear explosions; can be assimilated like calcium into bones