Scrabble?! FISSION

Definitions of FISSION in various dictionaries:

noun - reproduction of some unicellular organisms by division of the cell into two more or less equal parts

noun - a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy

The act or process of splitting into parts.

A nuclear reaction in which an atomic nucleus, especially a heavy nucleus such as an isotope of uranium, splits into fragments, usually two fragments of comparable mass, with the evolution of from 100 million to several hundred million electron volts of energy.

An asexual reproductive process in which a unicellular organism divides into two or more independently maturing daughter cells.

verb - to split into parts