Brownian motion
Concise Oxford English Dictionary © 2008 Oxford University Press:
Brownian motion /ˈbraʊnɪən/
▶noun Physics the erratic random movement of microscopic particles in a fluid, as a result of continuous bombardment from molecules of the surrounding medium.
– origin C19: named after the Scottish botanist Robert Brown.
'Brownian motion' also found in these Oxford entries:
