megaton(redirected from megatonic)
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1. one million tons
2. an explosive power, esp of a nuclear weapon, equal to the power of one million tons of TNT
The energy released by 1,000,000 metric tons of chemical high explosive calculated at a rate of 1000 calories per gram, or a total of 4.18 × 1015 joules; used principally in expressing the energy released by a nuclear bomb. Abbreviated MT.