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English definition of “megaton”

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megaton

noun [C] uk   /ˈmeɡ.ə.tʌn/ us  
a unit that has the same value as the force produced by 1,000,000 tons of TNT (= an explosive), used for measuring the power of explosions, especially nuclear explosions
(Definition of megaton from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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