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Nuclear winter

Nuclear winter

WordNet



noun


(1)   A long period of darkness and extreme cold that scientists predict would follow a full-scale nuclear war; a layer of dust and smoke in the atmosphere would cover the earth and block the rays of the sun; most living organisms would perish
Wiktonary



Noun


  1. A predicted drop in global temperature following a nuclear war due to dust in the upper atmosphere reducing sunlight reaching the ground.