Answer: fissile

AnswerCrossword Clue
FISSILECapable of being split
FISSILESplittable
FISSILEAble to be split
fissilecapable of being split
fissilepossessing a nucleus able to undergo fission
fissile(of a nuclide) able to undergo fission induced by low-energy neutrons, as uranium 233
fissilecapable of being split or divided; cleavable