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Brownian movement

/ ˈʊɪə /

noun

  1. random movement of microscopic particles suspended in a fluid, caused by bombardment of the particles by molecules of the fluid. First observed in 1827, it provided strong evidence in support of the kinetic theory of molecules
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of Brownian movement1

C19: named after Robert Brown
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Example Sentences

Examples have not been reviewed.

He has made other valuable contributions to Theoretical Physics, among these being a theory of the Brownian movements and various important applications of the modern quantum theory of energy.

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Brownian movements have already yielded up their dances to the motion picture camera.

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Note the locomotive activity of M. agilis and the Brownian movement of the remaining micrococci.

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Many bacteria when suspended in a fluid exhibit a power of independent movement which is, of course, quite distinct from the Brownian movement—a non-vital phenomenon common to all finely-divided particles suspended in a fluid.

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This incessant movement in the world of molecules is called the Brownian movement, and is a striking proof of the reality of molecular motions.

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