Megaton weapon - definition of megaton weapon by The Free Dictionary
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A nuclear weapon, the yield of which is measured in terms of millions of tons of trinitrotoluene explosive equivalents. See also kiloton weapon; nominal weapon; subkiloton weapon.
References in periodicals archive
This concept is now causing concern since current technology is believed to restrict penetration to around 15 metres of granite, at which depth a megaton weapon
would produce massive fallout.
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.