from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The random movement of microscopic particles suspended in a liquid or gas, caused by collisions with molecules of the surrounding medium.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun physics
Random motionof particlessuspended in a fluid, arising from those particles being struck by individual moleculesof the fluid.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun the random motion of small particles suspended in a gas or liquid
from The American Heritage® Dictionary of the English Language, 4th Edition
[After Robert Brown.]
from Wiktionary, Creative Commons Attribution/Share-Alike License
Named after botanist Robert Brown (1773-1858) who investigated the movement of pollen suspended in water.
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