nuclear weapon

from WordNet (r) 3.0 (2006)

nuclear weapon
    n 1: a weapon of mass destruction whose explosive power derives
         from a nuclear reaction [syn: {nuclear weapon}, {atomic
         weapon}]

from The Collaborative International Dictionary of English v.0.48

Nuclear weapon \Nu"cle*ar wea"pon\, n.
   A weapon of great explosive power, such as an {atomic bomb}
   or a {hydrogen bomb}, which depends for most of its explosive
   power on the release of energy from within atomic nuclei by a
   nuclear reaction. A {fission weapon} or a {fusion weapon}.
   The term includes atomic shells for cannon.
   [PJC]