- Brownian movement
- n. (also Brownian motion) Physics the erratic random movement of microscopic particles in a liquid, gas, etc., as a result of continuous bombardment from molecules of the surrounding medium.
Etymology: R. Brown, Sc. botanist d. 1858
* * *nounthe random motion of small particles suspended in a gas or liquid• Syn: ↑Brownian motion, ↑pedesis
* * *noun or brownian motion \\ˈbrau̇nēən-\Usage: usually capitalized BEtymology: after Robert Brown died 1858 Scottish botanist who discovered it: the peculiar random movement exhibited by microscopic particles of both organic and inorganic substances when suspended in liquids or gases that is caused by the impact of the molecules of fluid surrounding the particles
* * */brow"nee euhn/, 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 Brownian motion.[1870-75; Brown + -IAN]
* * *Brownian movement or Brownian motion,Physics. a constant, random, irregular motion often observed in very minute particles suspended in a liquid or gas, caused by the impact of surrounding molecules.╂[< Dr. Robert Brown, 1773-1858, a Scottish botanist, who first described it]
Useful english dictionary. 2012.