Greater Vocabulary for Greater World Power!
dud—Explosive munition which has not been armed as intended or which has failed to explode after being armed. See also absolute dud; dwarf dud; flare dud; nuclear dud.—page 170
dwarf dud—A nuclear weapon that, when launched at or emplaced on a target, fails to provide a yield within a reasonable range of that which could be anticipated with normal operation of the weapon. This constitutes a dud only in a relative sense.—page 171
(A tip of the cap to Steven Aftergood of the Federation of American Scientists for posting the recently revised Department of Defense official dictionary. Check out the invaluable FAS Project on Government Secrecy.)