[meg-uh-deth] /ˈmɛg əˌdɛθ/

a unit of one million : used in estimating or predicting the fatalities that would occur in a nuclear war.
the death of a million people, esp in a nuclear war or attack

1953, from mega- in scientific sense (one million) + death (n.). The death of one million persons, as a measure of the effectiveness of nuclear weapons. The resulting pile of dead bodies would be a megacorpse, according to writings on the topic.


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