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We found 45 dictionaries with English definitions that include the word fission:
Click on the first link on a line below to go directly to a page where "fission" is defined.

General (30 matching dictionaries)

1. fission: Merriam-Webster.com [home, info]
2. fission: Oxford Dictionaries [home, info]
3. fission: American Heritage Dictionary of the English Language [home, info]
4. fission: Collins English Dictionary [home, info]
5. fission: Vocabulary.com [home, info]
6. fission: Macmillan Dictionary [home, info]
7. Fission, fission: Wordnik [home, info]
8. fission: Cambridge Advanced Learner's Dictionary [home, info]
9. fission: Wiktionary [home, info]
10. fission: Webster's New World College Dictionary, 4th Ed. [home, info]
11. fission: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. fission: Infoplease Dictionary [home, info]
13. fission: Dictionary.com [home, info]
14. fission: Online Etymology Dictionary [home, info]
15. fission: UltraLingua English Dictionary [home, info]
16. fission: Cambridge Dictionary of American English [home, info]
17. Fission (album), Fission (band), Fission (biology), Fission (disambiguation), Fission: Wikipedia, the Free Encyclopedia [home, info]
18. Fission: Online Plain Text English Dictionary [home, info]
19. fission: Webster's Revised Unabridged, 1913 Edition [home, info]
20. fission: Rhymezone [home, info]
21. Fission: AllWords.com Multi-Lingual Dictionary [home, info]
22. fission: Hutchinson's Dictionary of Difficult Words [home, info]
23. fission: Free Dictionary [home, info]
24. fission: Hutchinson Dictionaries [home, info]
25. fission: Mnemonic Dictionary [home, info]
26. fission: WordNet 1.7 Vocabulary Helper [home, info]
27. fission: LookWAYup Translating Dictionary/Thesaurus [home, info]
28. fission: Dictionary/thesaurus [home, info]

Business (2 matching dictionaries)

29. Fission: Energy Dictionary [home, info]
30. fission: Legal dictionary [home, info]

Computing (1 matching dictionary)

31. fission: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

32. fission: online medical dictionary [home, info]
33. fission: Medical dictionary [home, info]

Science (7 matching dictionaries)

34. Fission: Eric Weisstein's World of Physics [home, info]
35. Fission: Extragalactic Astronomy [home, info]
36. fission: General Chemistry Online [home, info]
37. Fission (fissioning): NRC Glossary of Nuclear Terms -- [home, info]
38. fission: Natural History Terms [home, info]
39. FISSION: Zoom Astronomy Glossary [home, info]

Tech (3 matching dictionaries)

41. fission: NATURAL RESOURCES DEFENSE COUNCIL [home, info]
42. FISSION: Energy Terms [home, info]
43. Fission: Nuclear Terms [home, info]

(Note: See fissions for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (fission) ▸ noun:  a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy ▸ noun:  reproduction of some unicellular organisms by division of the cell into two more or less equal parts ▸ Also see fissions ▸ Word origin ▸ Words similar to fission ▸ Usage examples for fission ▸ Popular adjectives describing fission ▸ Words that often appear near fission ▸ Rhymes of fission ▸ Invented words related to fission