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3 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Pe·de·sis n.  Same as Brownian movement, under Brownian.
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From: Webster's Revised Unabridged Dictionary (1913)

 Brown·i·an a. Pertaining to Dr. Robert Brown, who first demonstrated (about 1827) the commonness of the motion described below.
 Brownian motion, Brownian movement, the peculiar, rapid, vibratory movement exhibited by the microscopic particles of substances when suspended in water or other fluids.
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From: WordNet (r) 2.0

 Brownian movement
      n : the random motion of small particles suspended in a gas or
          liquid [syn: Brownian motion, pedesis]