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- DictionaryBrown·i·an mo·tion/ˌbrounēən ˈmōSHən/
noun
- 1. the erratic random movement of microscopic particles in a fluid, as a result of continuous bombardment from molecules of the surrounding medium.
noun
The random motion of particles suspended in a fluid resulting from their collision with the quick atoms or molecules in the gas or liquid
Brownian motion is the random motion of particles suspended in a medium (a liquid or a gas). This motion pattern typically consists of random fluctuations in a particle's position inside a fluid sub-domain, followed by a relocation to another sub-domain. Each relocation is followed by more fluctuations within the new closed volume. This pattern describes a fluid at thermal equilibrium, defined by ... Wikipedia