fissionable

[fish-uh-nuh-buhl]
adjective Physics.
capable of or possessing a nucleus or nuclei capable of undergoing fission: a fissionable nucleus; fissionable material.
Also, fissile.


Origin:
1940–45; fission + -able

fissionability, noun
nonfissionable, adjective
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World English Dictionary
fissionable (ˈfɪʃənəbəl)
 
adj
Compare fissile capable of undergoing nuclear fission as a result of any process
 
fissiona'bility
 
n

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Example sentences
Packed inside the zirconium cladding are pellets of uranium oxide or other
  fissionable materials.
The fissionable material is degrading all the time and after several years they
  will no longer be sufficient to be fissile.
They create plutonium which is highly fissionable and highly desired by any
  country trying to develop a nuclear weapon.
Each cell could contain a tiny speck of fissionable material, or the cells
  could cluster in a colony around a source.
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