Definition of "brownian" [brown•i•an]

• Pertaining to Dr. Robert Brown, who first demonstrated (about 1827) the commonness of the motion described below. (adjective)

Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)

• "This is just like the classic physics observation by Robert Brown of the random walk traveled by pollen particles floating on water, demonstrating random thermal or "brownian" motion."
• "For example, although the brownian motion of a particle appears random, it can still be causally described if we know enough about the motions of the particles surrounding it."
• "To elaborate on DeWitt, an l(0) process is white noise and an l(1) process, a classical random walk ("brownian motion"). l(2) is a bit harder to describe: perhaps the location of a vehicle tracked by an inertial device, where the acceleration is "noisy"."