| brownian | Pertaining to Dr. Robert Brown, who first demonstrated (about 1827) the commonness of the motion described below. Brownian movement, the peculiar, rapid, vibratory movement exhibited by the microscopic particles of substances when suspended in water or other fluids. Source: Websters Dictionary (01 Mar 1998) |
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| Brownian motion | <chemistry, physics> Random motion of small objects as a result of intermolecular collisions. First described by the 19th Century microscopist, Brown. (18 Nov 1997) |
| brownian movement | Erratic, nondirectional, zigzag movement observed by ultramicroscope in certain colloidal solutions and by microscope in suspensions of light particulate matter that results from the jostling or bumping of the larger particles by the molecules in the suspending medium which are regarded as being in continuous motion. Synonym: brownian motion, brownian-Zsigmondy movement, molecular movement, pedesis. (05 Mar 2000) |
| brownian-Zsigmondy movement | Erratic, nondirectional, zigzag movement observed by ultramicroscope in certain colloidal solutions and by microscope in suspensions of light particulate matter that results from the jostling or bumping of the larger particles by the molecules in the suspending medium which are regarded as being in continuous motion. Synonym: brownian motion, brownian-Zsigmondy movement, molecular movement, pedesis. (05 Mar 2000) |