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fissile

[fis-uhl] Origin

fis·sile

[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

fis·sil·i·ty, noun
non·fis·sile, adjective
non·fis·sil·i·ty, noun
un·fis·sile, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Fissile is always a great word to know.
So is law of gravitation. Does it mean:
a unit of energy, the work done by a force of one newton when its point of application moves through a distance of one meter in the direction of the force
any two masses attract each other with a force equal to a constant, multiplied by the product of the two masses, divided by the square of the distance between them
Collins
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
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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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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