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Brown'i•an move'ment



Pronunciation: (brou'nē-un), [key] Physics.
the irregular motion of small particles suspended in a liquid or a gas, caused by the bombardment of the particles by molecules of the medium: first observed by Robert Brown in 1827. Also called Brown'ian mo'tion.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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