We found 17 dictionaries that define the word fissionable:

General (14 matching dictionaries)

1. fissionable: Merriam-Webster
2. fissionable: Oxford Learner's Dictionaries
3. fissionable: American Heritage Dictionary of the English Language
4. fissionable: Collins English Dictionary
5. fissionable: Vocabulary.com
6. fissionable: Wordnik
7. fissionable: Wiktionary
8. fissionable: Infoplease Dictionary
9. fissionable: Dictionary.com
10. Fissionable: Wikipedia, the Free Encyclopedia
11. fissionable: Rhymezone
12. fissionable: FreeDictionary.org
13. fissionable: Mnemonic Dictionary
14. fissionable: TheFreeDictionary.com

Computing (1 matching dictionary)

15. fissionable: Encyclopedia

Medicine (1 matching dictionary)

16. fissionable: Merriam-Webster Medical Dictionary

Tech (1 matching dictionary)

17. Nuclear Terms (No longer online)

(Note: See fissionability as well.)

Definitions from Wiktionary (fissionable) ▸ adjective:  Capable of undergoing nuclear fission; fissile. ▸ noun:  Any fissile or fissionable substance. Similar: fissile, fertile, subfissile, nukeable, fluxible, defusable, fusible, fracturable, firable, infractible, more... Opposite: fusible Types: uranium, plutonium, thorium, americium, curium, more... Phrases: fissionable material, more... ▸ Words similar to fissionable ▸ Usage examples for fissionable ▸ Idioms related to fissionable ▸ Wikipedia articles (New!) ▸ Popular adjectives describing fissionable ▸ Popular nouns described by fissionable ▸ Words that often appear near fissionable ▸ Rhymes of fissionable ▸ Invented words related to fissionable