"Brownian motion." YourDictionary, n.d. Web. 10 November 2018. <https://www.yourdictionary.com/brownian-motion>.
Brownian motion. (n.d.). Retrieved November 10th, 2018, from https://www.yourdictionary.com/brownian-motion
The random movement of microscopic particles suspended in a liquid or gas, caused by collisions between these particles and the molecules of the liquid or gas. This movement is named for its identifier, Scottish botanist Robert Brown (1773–1858).