Dictionary

Brownian motion

noun Brown·ian motion \ˈbra-nē-ən-\

Definition of BROWNIAN MOTION

:  a random movement of microscopic particles suspended in liquids or gases resulting from the impact of molecules of the surrounding medium —called also Brownian movement

Origin of BROWNIAN MOTION

Robert Brown †1858 Scottish botanist
First Known Use: 1871

Brownian motion

noun Brown·ian motion \ˌbra-nē-ən-\   (Medical Dictionary)

Medical Definition of BROWNIAN MOTION

:  a random movement of microscopic particles suspended in liquids or gases resulting from the impact of molecules of the fluid surrounding the particles—called also Brownian movement

Biographical Note for BROWNIAN MOTION

Brown \ˈbran\ , Robert (1773–1858), British botanist. Brown was one of the leading botanists of his day. In 1801 he accompanied a surveying expedition to and around Australia, acting as the company's naturalist. In 1805 he returned to Great Britain with about 3,900 species of plants, and in 1810 he published a great work on the flora of Australia. In the field of botany he is also known for his substantial contributions to plant morphology, embryology, and geography, for improving plant classification and making a fundamental distinction between gymnosperms and angiosperms, for establishing and defining new families and genera, and for describing and naming the nucleus of a plant cell. He published his observations on Brownian motion in 1831.

Browse

Next Word in the Dictionary: browniePrevious Word in the Dictionary: brown hyenaAll Words Near: Brownian motion
April 27, 2015
savvy Hear it
to understand
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears