- Physics. to undergo fission.
- Physics. to cause to undergo fission.
Origin of fission
Examples from the Web for fission
One of the isotopes of fission products, when fuel melts, is an iodine isotope, and it goes in your body through your thyroid.Japan Nuclear Fallout: How Bad Could It Get?
March 12, 2011
The foraminifer multiplies by fission, or by a process of budding.
The multiplication of the amba is brought about by a process of fission or division.
They are contractile, and propagated by spontaneous division, or fission.The Ocean World:
It will be found full of septic vibrios in process of generation by fission.Louis Pasteur
As already said, the lowest form of reproduction is that by fission.Evolution
Joseph Le Conte
- the act or process of splitting or breaking into parts
- biology a form of asexual reproduction in single-celled animals and plants involving a division into two or more equal parts that develop into new cells
- short for nuclear fission
Word Origin and History for fission
1841, "division of a cell or organism," from Latin fissionem (nominative fissio) "a breaking up, cleaving," from past participle stem of findere "to split" (see fissure). Cognate with Old English bitan "to bite." Nuclear physics sense is 1939. As a verb, from 1929.
- The act or process of splitting into parts.
- The amitotic division of a cell or its nucleus.
- An asexual process of reproduction in which a unicellular organism divides into two or more independently maturing daughter cells.
- A nuclear reaction in which an atomic nucleus, especially a heavy nucleus such as an isotope of uranium, splits into fragments, usually two of comparable mass, with the evolution of from 100 million to several hundred million electron volts of energy.
- The splitting of an unstable atomic nucleus into two or more nuclei. Fission occurs spontaneously, generally when a nucleus has an excess of neutrons, resulting in the inability of the strong force to bind the protons and neutrons together. The fission reaction used in many nuclear reactors and bombs involves the absorption of neutrons by uranium-235 nuclei, which immediately undergo fission, releasing energy and fast neutrons. Compare fusion.
- A process of asexual reproduction in which a single cell splits to form two identical, independent cells. In fission, the chromosomal DNA replicates before the cell divides. Most bacteria and other prokaryotes reproduce by means of fission. Also called binary fission