Answer: fission

AnswerCrossword Clue
FISSIONSplitting.
FISSIONA splitting into parts.
FISSIONSplitting of an atom nucleus.
FISSIONProcess by which amoebas multiply.
FISSIONSplitting of molecules.
FISSIONAtom splitting.
FISSIONA splitting, as of atoms
FISSIONAtomic energy source
FISSIONEnergy producer
FISSIONSplitting
FISSIONGamma ray producer
fissionsplitting, esp. of the nucleus of an atom
fissionto split into parts