from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A unit of explosive force equal to that of one million metric tons of TNT.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A measure of the strength of an explosion or a bomb based on how many million tons of TNT would be needed to produce the same energy.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a measure of explosive power (of an atomic weapon) equal to that of one million tons of TNT
- n. one million tons
metric prefix mega- + ton (Wiktionary)