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

• nuclear fission

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

• agamogenesis
• asexual reproduction

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

• nuclear reaction

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

• schizogony