noun. The act or process of splitting into parts.

noun. 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 but unequal mass, and releases a few neutrons and about 100 million electron volts of energy. Nuclear fission may occur spontaneously or may be induced by the absorption of a neutron, which can initiate a nuclear chain reaction.

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

intransitive verb. To cause (an atom) to undergo fission.

intransitive verb. To undergo fission.

noun. The act of cleaving, splitting, or breaking up into parts.

noun. In biology, the automatic division of a cell or an independent organism into new cells or organisms; especially, such division as a process of multiplication or reproduction. Also fissuration. See cut under Paramecium.

noun. A cleaving, splitting, or breaking up into parts.

noun. A method of asexual reproduction among the lowest (unicellular) organisms by means of a process of self-division, consisting of gradual division or cleavage of the into two parts, each of which then becomes a separate and independent organisms; as when a cell in an animal or plant, or its germ, undergoes a spontaneous division, and the parts again subdivide. See Segmentation, and Cell division, under Division.

noun. A process by which certain coral polyps, echinoderms, annelids, etc., spontaneously subdivide, each individual thus forming two or more new ones. See Strobilation.

noun. The act or process of disintegration of an atomic nucleus into two or more smaller pieces; called also nuclear fission. The process may be spontaneous or induced by capture of neutrons or other smaller nuclei, and usually proceeds with evolution of energy.

noun. The process whereby one item splits to become two.

noun. The process of splitting the nucleus of an atom into smaller particles; nuclear fission

noun. The process by which a bacterium splits to form two daughter cells.

verb. To cause to undergo fission.

verb. To undergo fission.

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

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

"When an organ becomes divided it receives at the hands of descriptive botanists the appellations cleft, partite, or sect, according to the depth of the division; hence in considering the teratological instances of this nature, the term fission has suggested itself as an appropriate one to be applied to the subdivision of an habitually entire or undivided organ."

fissile  fission bomb  fissionable  fissional  

nuclear reaction  

Deposition  Inquisition  Prohibition  Titian  abolition  

anti-personnel  antimatter  antipersonnel  armor-piercing  atomic  

ablate  abscission  accelerate  activate  alpha decay  

division  segmentation  strobilation