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

Origin of megaton

First recorded in 1950–55; mega- + ton1
Related formsmeg·a·ton·ic [meg-uh-ton-ik] /ˌmɛg əˈtɒn ɪk/, adjectivemul·ti·meg·a·ton, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for megaton

Historical Examples of megaton

  • Larch put off another entertainment of small stuff, with a fifty megaton thermonuclear, viewscreen-piloted, among them.

    Space Viking

    Henry Beam Piper

British Dictionary definitions for megaton



one million tons
an explosive power, esp of a nuclear weapon, equal to the power of one million tons of TNTAbbreviation: mt
Derived Formsmegatonic (ˌmɛɡəˈtɒnɪk), adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for megaton

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

Online Etymology Dictionary, © 2010 Douglas Harper