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dirty bomb

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WordReference Random House Unabridged Dictionary of American English © 2026

dirt′y bomb′,

Militarya nuclear warhead designed to produce a great amount of radioactive debris by use of a fusion core, fission trigger, and casing of uranium-238.

Collins Concise English Dictionary © HarperCollins Publishers::

dirty bomb n

informal a bomb made from nuclear waste combined with conventional explosives that is capable of spreading radioactive material over a very wide area

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