megadeath

[ meg-uh-deth ]
/ ˈmɛg əˌdɛθ /

noun

a unit of one million deaths: used in estimating or predicting the fatalities that would occur in a nuclear war.

Origin of megadeath

First recorded in 1950–55; mega- + death

British Dictionary definitions for megadeath

megadeath
/ (ˈmɛɡəˌdɛθ) /

noun

the death of a million people, esp in a nuclear war or attack