Found 2 items, similar to Atom bomb.
English → English (WordNet) Definition: atom bomb atom bomb n : 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) [syn: atomic bomb, A-bomb, fission bomb, plutonium bomb]
English → English (gcide) Definition: Atom bomb Atom bomb \At"om bomb`\, Atomic bomb \A*tom"ic bomb`\n. a bomb of great power in which the explosive energy is derived from the nuclear fission of a fissionable material, such as plutonium or uranium-235. It is a type of nuclear weapon. The strength of an atom bomb is measured in kilotons, i.e. the equivalent energy released by explosion of a thousand tons of TNT. The first atomic bomb was manufactured in 1945. Syn: A-bomb, fission bomb. [PJC]