fission

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. reproduction of some unicellular organisms by division of the cell into two more or less equal parts
• Hypernyms:
asexual reproduction, agamogenesis
• Hyponyms:
schizogony
2. a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
• Syn:
nuclear fission
• Hypernyms:
nuclear reaction