capable of being split or divided; cleavable.
- (of a nuclide) capable of undergoing fission induced by low-energy neutrons, as uranium 233 and 235.
Origin of fissile
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Word Origin for fissile
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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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