Megaton weapon | Article about megaton weapon by The Free Dictionary
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megaton weapon[′meg·ə‚tən ′wep·ən]
A nuclear fission or fusion bomb capable of exploding with megaton energy.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Thus the 50+ megaton weapon
tested by the USSR was some 4000 times more powerful than the Hiroshima and Nagasaki weapons that each had a blast radius of 1.5 miles.