We found 25 dictionaries that define the word hydrogen bomb:

General (19 matching dictionaries)

1. hydrogen bomb: Merriam-Webster
2. hydrogen bomb: Oxford Learner's Dictionaries
3. hydrogen bomb: American Heritage Dictionary of the English Language
4. hydrogen bomb: Collins English Dictionary
5. hydrogen-bomb, hydrogen bomb: Vocabulary.com
6. hydrogen bomb: Cambridge Advanced Learner's Dictionary
7. hydrogen bomb: Wiktionary
8. hydrogen bomb: The Wordsmyth English Dictionary-Thesaurus
9. hydrogen bomb: Infoplease Dictionary
10. hydrogen-bomb, hydrogen bomb: Dictionary.com
11. Hydrogen Bomb, Hydrogen bomb: Wikipedia, the Free Encyclopedia
12. hydrogen-bomb, hydrogen bomb: Rhymezone
13. hydrogen bomb: AllWords.com Multi-Lingual Dictionary
14. hydrogen-bomb, hydrogen bomb: FreeDictionary.org
15. hydrogen-bomb, hydrogen bomb: Mnemonic Dictionary
16. hydrogen-bomb, hydrogen bomb: TheFreeDictionary.com
17. hydrogen bomb: Longman Dictionary of Contemporary English

Computing (1 matching dictionary)

18. hydrogen bomb: Encyclopedia

Medicine (1 matching dictionary)

19. online medical dictionary (No longer online)

Science (2 matching dictionaries)

20. From Stargazers to Starships Glossary (No longer online)
21. Hydrogen Bomb: Eric Weisstein's World of Physics

Slang (1 matching dictionary)

22. hydrogen bomb: Urban Dictionary

Tech (1 matching dictionary)

23. Explosives (No longer online)

(Note: See hydrogen_bombs as well.)

Definitions from Wiktionary (hydrogen bomb) ▸ noun:  A thermonuclear bomb that derives its destructive power from the fusion of isotopes of hydrogen (deuterium and tritium). Similar: fusion bomb, H-bomb, thermonuclear bomb, hydrogen warhead, hydrogen ion, heavy hydrogen, hydrogen, hydrogen vehicle, hydrogen bond, hydrogen-1, more... Opposite: atomic bomb, conventional bomb, non-nuclear bomb Phrases: British hydrogen bomb programme, more... ▸ Words similar to hydrogen bomb ▸ Usage examples for hydrogen bomb ▸ Idioms related to hydrogen bomb ▸ Wikipedia articles (New!) ▸ Words that often appear near hydrogen bomb ▸ Rhymes of hydrogen bomb ▸ Invented words related to hydrogen bomb