Wordnet 3.0
ADJECTIVE (1)
1.
not fissile;
The Collaborative International Dictionary of English v.0.48:
nonfissile \nonfissile\ adj.
not fissile. Opposite of fissile.
[WordNet 1.5]
WordNet (r) 3.0 (2006):
nonfissile
adj 1: not fissile [ant: fissile]