from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The act or process of splitting into parts.
- n. 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, releasing from 100 million to several hundred million electron volts of energy.
- n. Biology An asexual reproductive process in which a unicellular organism divides into two or more independently maturing daughter cells.
- transitive v. To cause (an atom) to undergo fission.
- intransitive v. To undergo fission.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The process whereby one item splits to become two.
- n. The process of splitting the nucleus of an atom into smaller particles; nuclear fission
- n. The process by which a bacterium splits to form two daughter cells.
- v. To cause to undergo fission.
- v. To undergo fission.
from the GNU version of the Collaborative International Dictionary of English
- n. A cleaving, splitting, or breaking up into parts.
- n. 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.
- n. A process by which certain coral polyps, echinoderms, annelids, etc., spontaneously subdivide, each individual thus forming two or more new ones. See Strobilation.
- n. 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.
from The Century Dictionary and Cyclopedia
- n. The act of cleaving, splitting, or breaking up into parts.
- n. 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.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
- n. 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.
(1878-1968) interpreted the fission of uranium (the term fission is another Copenhagen contribution), in terms of the "liquid drop model."
Once we secure all that, I hope that we can figure out how to use it in fission reactors to create electricity of be batteries for deep space probes (for where solar panels won't generate enough power).
Nuclear fission is neither clean nor safe nor unlimited.
I think nuclear fission is a bad way to get energy.
The discovery of nuclear fission is very momentous and indeed dangerous, but even more, it is full of promise.
Nuclear fission is one of the major discoveries of all time, and the circumstances of its birth have inevitably done much to impress the layman with the destructive rather than the constructive powers of the science that brought it into being.
[...] Nuclear Fission: Fusion may be commercially available by 2040 if we’re lucky, but fission is here today.
- Nuclear power is produced by harnessing the heat produced by the splitting of atoms inside uranium - a process known as fission.
Nuclear fission occurs when heavy atoms such as uranium or plutonium split into smaller, lighter atoms, releasing neutrons and energy.