Brownian movement Hear it!

Brownian movement definition

Brown·ian movement (bro̵un′ē ən)

the constant, random, zigzag movement of small particles dispersed in a fluid medium, caused by collision with molecules of the fluid

Etymology: after R. Brown (1773-1858), Brit botanist who described it

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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