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megaton
(redirected from Megatonne)

    Also found in: Dictionary/thesaurus, Medical, Legal, Financial, Wikipedia 0.01 sec.
megaton
1. one million tons
2. an explosive power, esp of a nuclear weapon, equal to the power of one million tons of TNT
megaton [′meg·ə‚tən]
(physics)
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 × 1015joules; used principally in expressing the energy released by a nuclear bomb. Abbreviated MT.
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