Noun
the random motion of small particles suspended in a gas or liquid
Source: WordNetMaxwell thought that Brownian movement was more because of some unobserved external disturbance and hence if “submitted to a more powerful microscope the bodies will demonstrate only more perfect repose”. Source: Internet
These papers were the foundation for the 1905 paper on Brownian motion, which showed that Brownian movement can be construed as firm evidence that molecules exist. Source: Internet