hydrogen bomb

American  

[hahy-druh-juhn bom] / ˈhaɪ drə dʒən ˌbɒm /

Also H-bomb

noun

• hydrogen bombs
  plural

1. a bomb, more powerful than an atomic bomb, that derives its explosive energy from the thermonuclear fusion reaction of hydrogen isotopes.

---

hydrogen bomb British  

noun

1. Also called: H-bomb.  a type of bomb in which energy is released by fusion of hydrogen nuclei to give helium nuclei. The energy required to initiate the fusion is provided by the detonation of an atomic bomb, which is surrounded by a hydrogen-containing substance such as lithium deuteride See also fusion bomb

---

hydrogen bomb Scientific  

1. An extremely destructive bomb whose explosive power is derived from the energy released when hydrogen atoms are fused to form helium. This atomic fusion reaction is the same reaction that takes place in stars like the Sun, where the pressure of gravity forces hydrogen atoms to fuse; a hydrogen bomb uses the force of an atomic explosion (the fission reaction exploited in atomic bombs) to compress the hydrogen to the point where fusion takes place. Hydrogen bombs are many times more powerful than atomic bombs.

---

hydrogen bomb Cultural  

1. A nuclear weapon with enormous explosive power, fueled by nuclear fusion, in which atoms of hydrogen combine to form atoms of helium.

---

Other Word Forms

Noun Inflected Forms

• hydrogen bombs
  plural

Etymology

Origin of hydrogen bomb

First recorded in 1945–50

Compare meaning

How does hydrogen-bomb compare to similar and commonly confused words? Explore the most common comparisons:

• hydrogen bomb vs. atomic bomb

Example Sentences

See Examples For:

hydrogen bomb

On July 6, 1962, the Energy Department set off a hydrogen bomb 75 miles southwest of Las Vegas, in the hopes of proving that nuclear weapons could be used for peaceful purposes, such as earthmoving.

From The Wall Street Journal ● Jun. 21, 2026

Rabi at the 1954 hearing convened to consider stripping J. Robert Oppenheimer of his security clearance because of his opposition to developing the hydrogen bomb.

From Los Angeles Times ● Feb. 6, 2026

Teller’s explanation was likely self-serving given his later acrimonious rift with Oppenheimer over the hydrogen bomb.

From Salon ● Jul. 22, 2025

In 2017, Pyongyang claimed it had successfully created a miniaturised hydrogen bomb designed to fit inside its missiles - a major step in its nuclear ambitions.

From BBC ● Sep. 14, 2023

The heat released in this reaction, which is like a controlled hydrogen bomb explosion, is what makes the star shine.

From "A Brief History of Time: And Other Essays" by Stephen Hawking