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hydrogen bomb

noun

: a bomb whose violent explosive power is due to the sudden release of atomic energy resulting from the fusion of light nuclei (as of hydrogen atoms) at very high temperature and pressure to form helium nuclei

Examples of hydrogen bomb in a Sentence

Recent Examples on the Web
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In 1952: The United States tested the first hydrogen bomb on the Eniwetok atoll in the Pacific Ocean, resulting in a blast equivalent to 10.4 megatons of TNT, hundreds of times more powerful than the atomic bomb dropped on Hiroshima. Arizona Republic, AZCentral.com, 1 Nov. 2025 Nuclear fusion technology developed the hydrogen bomb in the 1950s but as an energy source, fusion power has been generated only for very short periods in the laboratory and no commercial reactors exist. Rob Nikolewski, San Diego Union-Tribune, 29 Oct. 2025 These titanic plasma explosions, also known as solar flares, each unleashed the energy of a million hydrogen bombs. Dagomar Degroot, The Conversation, 28 Oct. 2025 The hydrogen bomb and China followed. MSNBC Newsweek, 8 Oct. 2025 See All Example Sentences for hydrogen bomb

Word History

First Known Use

1947, in the meaning defined above

Time Traveler
The first known use of hydrogen bomb was in 1947

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Cite this Entry

“Hydrogen bomb.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydrogen%20bomb. Accessed 2 Dec. 2025.

Kids Definition

hydrogen bomb

noun
: a bomb whose violent explosive power is due to the sudden release of atomic energy when hydrogen nuclei unite

More from Merriam-Webster on hydrogen bomb

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