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fissile

[fis-uh l] /ˈfɪs əl/
adjective
1.
capable of being split or divided; cleavable.
2.
Physics.
  1. fissionable.
  2. (of a nuclide) capable of undergoing fission induced by low-energy neutrons, as uranium 233 and 235.
Origin
1655-1665
1655-65; < Latin fissilis, equivalent to fiss(us) (see fissi-) + -ilis -ile
Related forms
fissility, noun
nonfissile, adjective
nonfissility, noun
unfissile, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for unfissile

fissile

/ˈfɪsaɪl/
adjective
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
Derived Forms
fissility (fɪˈsɪlɪtɪ) noun
Word Origin
C17: from Latin fissilis, from fissus split; see fissi-
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for unfissile

fissile

adj.

1660s, from Latin fissilis "that which may be cleft or split," from fissus, past participle of findere (see fissure).

Online Etymology Dictionary, © 2010 Douglas Harper
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