un fissile

fissile

[fis-uhl]
adjective
1.
capable of being split or divided; cleavable.
2.
Physics.
b.
(of a nuclide) capable of undergoing fission induced by low-energy neutrons, as uranium 233 and 235.

Origin:
1655–65; < Latin fissilis, equivalent to fiss(us) (see fissi-) + -ilis -ile

fissility, noun
nonfissile, adjective
nonfissility, noun
unfissile, adjective
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World English Dictionary
fissile (ˈfɪsaɪl)
 
adj
1.  (Brit) capable of undergoing nuclear fission as a result of the impact of slow neutrons
2.  (US), (Canadian) another word for fissionable
3.  tending to split or capable of being split
 
[C17: from Latin fissilis, from fissus split; see fissi-]
 
fissility
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

fissile
1660s, from L. fissilis, from findere (see fissure).
Online Etymology Dictionary, © 2010 Douglas Harper
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