fission

English Thesaurus

1. a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy (noun.process)

hypernym	:	nuclear reaction,
definition	:	(physics) a process that alters the energy or structure or composition of atomic nuclei (noun.process)

2. reproduction of some unicellular organisms by division of the cell into two more or less equal parts (noun.process)

hypernym	:	agamogenesis, asexual reproduction,
definition	:	reproduction without the fusion of gametes (noun.process)

hyponym	:	schizogony,
definition	:	asexual reproduction by multiple fission; characteristic of many sporozoan protozoans (noun.process)