megadeath

• n. 一百万人之死亡（计算核战争杀伤率的单位）

mega-,百万，兆，death,死亡。用于核武器杀伤力的计算单位。

megadeath (n.)

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.