Usually means: Incapable of undergoing nuclear fission.
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We found 10 dictionaries that define the word nonfissionable:

General (10 matching dictionaries)
  1. nonfissionable: Merriam-Webster
  2. nonfissionable: Collins English Dictionary
  3. nonfissionable: Vocabulary.com
  4. nonfissionable: Wordnik
  5. nonfissionable: Wiktionary
  6. nonfissionable: Dictionary.com
  7. nonfissionable: Rhymezone
  8. nonfissionable: FreeDictionary.org
  9. nonfissionable: Mnemonic Dictionary
  10. nonfissionable: TheFreeDictionary.com

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Definitions from Wiktionary (nonfissionable)

▸ adjective:  Not fissionable.

Similar:
unfissionable, nonfissioned, nonfissile, unfissioned, unfissile, fissionless, nonradioactive, unfossilizable, nonthermonuclear, nondivisible, more...

Opposite:
fissionable, fissile

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Similar:
unfissionable, nonfissioned, nonfissile, unfissioned, unfissile, fissionless, nonradioactive, unfossilizable, nonthermonuclear, nondivisible, more...

Opposite:
fissionable, fissile



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