Non-fissile

[fis-uh l] /ˈfɪs əl/

adjective
1.
capable of being split or divided; cleavable.
2.
Physics.

/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
adj.

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

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