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|Noun||1.||atomic weapon - a weapon of mass destruction whose explosive power derives from a nuclear reaction|
A-bomb, atom bomb, atomic bomb, fission bomb, plutonium bomb - a nuclear weapon in which enormous energy is released by nuclear fission (splitting the nuclei of a heavy element like uranium 235 or plutonium 239)
atomic warhead, nuclear warhead, nuke, thermonuclear warhead - the warhead of a missile designed to deliver an atom bomb
fusion bomb, H-bomb, hydrogen bomb, thermonuclear bomb - a nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium
megaton bomb - a nuclear weapon with an explosive power equivalent to one million tons of TNT