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Nuclear Regulatory Commission
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nuclear winter

nu·cle·ar win·ter (plural nu·cle·ar win·ters)


noun 
Definition:
 
cold dark period after nuclear explosions: a period of continual cold and darkness believed by some scientists to be a likely consequence of a nuclear war. It would be caused by the blocking of the Sun's rays by high-altitude dust clouds, and would have disastrous environmental consequences.

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