1 dispersion | Definition of dispersion

dispersion

noun
dis·​per·​sion | \ di-ˈspÉ™r-zhÉ™n How to pronounce dispersion (audio) , -shÉ™n\

Definition of dispersion

1 capitalized, Judaism : diaspora sense 1b
2 : the act or process of dispersing : the state of being dispersed crowd dispersion
3 mathematics : the scattering of the values of a frequency distribution from an average
4 physics : the separation of light into colors by refraction or diffraction with formation of a spectrum also : the separation of radiation (see radiation sense 2) into components in accordance with some varying characteristic (such as energy)

5 chemistry

a : a dispersed (see disperse sense 2c) substance
b : a system (see system sense 1a(2)) consisting of a dispersed substance and the medium in which it is dispersed : colloid sense 2b

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Examples of dispersion in a Sentence

the dispersion of energy from a source

Recent Examples on the Web

In Bayonne, a town outside Biarritz, police fired tear gas, water cannons and dispersion grenades on a crowd of about 400 anti-capitalist demonstrators. Eli Stokols, Los Angeles Times, "Trump arrives for G-7 as allies brace for disruption," 24 Aug. 2019 The Taliban counter these advantages through dispersion and hiding among the people. Fox News, "How the Taliban remained dominant in Afghanistan: Terrifying tactics and an advancing weapons arsenal," 7 Aug. 2019 In winter, cold, polluted air is trapped near the ground by an inversion: a layer of warmer air above that prevents the dispersion of pollutants. Beth Gardiner, National Geographic, "Kids suffer most in one of Earth's most polluted cities," 26 Mar. 2019 Astronomers call this characteristic of a signal its dispersion measure (DM). Yvette Cendes, Discover Magazine, "What Are FRBs? The Discovery of Mysterious Signals From the Cosmos," 7 Feb. 2019 The dispersion between two- and 10-year Treasury rates, known as the yield curve, has also widened in past trading sessions to a recent 0.203 percentage point from an 11-year low of about 0.1 percentage point earlier this month. Daniel Kruger, WSJ, "U.S. Government Bonds Rise on Slower Growth Expectations," 28 Dec. 2018 In terms of dispersion, both the automatic 14 inch, and the semi-automatic 7-inch will have an average mean radius of 400 meters (1,312 feet). Allison Barrie, Fox News, "Army's new machine gun will blast like battle tanks," 19 July 2018 The problem is, the dispersion of more than 2,000 migrant children across states like Texas, Maryland, and New York doesn’t appear to follow consent decree. Jenn M. Jackson, Teen Vogue, "Separating Children From Parents is Shocking And Inhumane — It Is Also An American Tradition," 22 June 2018 This highly uneven dispersion (brown maps) is a surprise. Mark Fischetti, Scientific American, "Reptiles Are Concentrated in Specific Locations, Often Unprotected," 1 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'dispersion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of dispersion

14th century, in the meaning defined at sense 1

History and Etymology for dispersion

see disperse

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More Definitions for dispersion

dispersion

noun
dis·​per·​sion | \ dis-ˈpÉ™r-zhÉ™n, -shÉ™n How to pronounce dispersion (audio) \

Medical Definition of dispersion

1 : the act or process of dispersing : the state of being dispersed
2 : the separation of light into colors by refraction or diffraction with formation of a spectrum also : the separation of radiation into components in accordance with some varying characteristic (as energy)
3a : a dispersed substance
b : a system consisting of a dispersed substance and the medium in which it is dispersed : colloid sense 2b

called also disperse system

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