Brownian movement

British  

/ ˈbraʊnɪən /

noun

1. random movement of microscopic particles suspended in a fluid, caused by bombardment of the particles by molecules of the fluid. First observed in 1827, it provided strong evidence in support of the kinetic theory of molecules

---

Etymology

Origin of Brownian movement

C19: named after Robert _Brown

Example Sentences

Like molecules jostling to the ceaseless rhythms of Brownian movement, they express physical uncertainty and ambiguous motion.

From Time Magazine Archive

This movement is called the Brownian movement, and it furnishes a striking illustration of the truth of the theory that the molecules of a body are in a state of continual motion.

From The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told by Thomson, J. Arthur

Note the locomotive activity of M. agilis and the Brownian movement of the remaining micrococci.

From The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. by Eyre, J. W. H. (John William Henry)

This incessant movement in the world of molecules is called the Brownian movement, and is a striking proof of the reality of molecular motions.

From The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told by Thomson, J. Arthur