megatonic

noun

1. one million tons.
2. an explosive force equal to that of one million tons of TNT, as that of atomic or hydrogen bombs. Abbreviation: MT

noun

1. one million tons
2. an explosive power, esp of a nuclear weapon, equal to the power of one million tons of TNTAbbreviation: mt

n.unit of explosive power equal to one million tons of TNT, 1952, from mega- + ton. Related: Megatonnage.