megaton
noun [ C ] uk/ˈmeɡ.ə.tʌn/ us/ˈmeɡ.ə.tʌn/
百万吨级（相当于100万吨梯恩梯炸药的爆炸威力，用于计量爆炸威力、尤其是核武器的爆炸威力）
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