brownian movement


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movement

 [mo̳v´ment]
1. an act of moving; called also motion.
2. an act of defecation.
active movement movement produced by the person's own muscles.
ameboid movement movement like that of an ameba, accomplished by protrusion of cytoplasm of the cell.
associated movement movement of parts that act together, as the eyes.
brownian movement the peculiar, rapid, oscillatory movement of fine particles suspended in a fluid medium; called also molecular movement.
circus movement the propagation of an impulse again and again through tissue already previously activated by it; the term is usually reserved for the reentry involving an accessory pathway.
molecular movement brownian movement.
passive movement a movement of the body or of the extremities of a patient performed by another person without voluntary motion on the part of the patient.
vermicular m's the wormlike movements of the intestines in peristalsis.

brown·i·an move·ment

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.
[Robert Brown]

brown·i·an move·ment

(brown'ē-ăn mūv'mĕnt)
Erratic, nondirectional, zigzag movement observed by microscope in suspensions of particles in fluid, resulting from the jostling or bumping of the larger particles by the molecules in the suspending medium.
Synonym(s): molecular movement, pedesis.
[Robert Brown]

Brownian movement

a random movement of microscopic particles suspended in liquids or gases which results from the impact of molecules in the fluid around the particles. Such movements can be seen in COLLOIDS in a solid state or in a suspension of microorganisms. Named after Robert Brown (1773–1858).

Brown,

Robert, English botanist, 1773-1858.
brownian motion - Synonym(s): brownian movement
brownian movement - rapid random motion of small particles in suspension. Synonym(s): brownian motion; brownian-Zsigmondy movement; molecular movement; pedesis
brownian-Zsigmondy movement - Synonym(s): brownian movement

Zsigmondy,

Richard, Austrian-German chemist and Nobel laureate, 1865-1929.
brownian-Zsigmondy movement - Synonym(s): brownian movement
Zsigmondy test - Synonym(s): Lange test
References in periodicals archive ?
In fact, exclusive of molecular diffusion and Brownian movement; every flow velocity profile of HFOV necessitates the initiation of some form of convective gas motion however, "bulk convection" is inconsequential to gas transport during HFOV.
DTI detects the diffusion, or Brownian movement, of water protons within and between individual cells and yields measures of the magnitude and predominant orientation of this movement.
"Rectified Brownian Movement in Molecular and Cell Biology," R.F.
The result is, in Xenakis's terminology for this compositional method, a "Brownian movement." As is well known, in physics, Brownian movements are small, chaotic movements of molecules suspended in a liquid or a gas, which result from their collision with the surrounding molecules--whether we can hear Xenakis's Brownian movements as good metaphors for the Brownian movements of physics is another question!
Because expansion of covered area over time is approximately circular for all species, Brownian movement or diffusion is sufficient to characterize movement at large scales (hundreds of meters).
Bernard Frize's paintings, at first glance, give the impression of this kind of extreme heterogeneity, but while his work may follow no regular, easily parsed progression, neither is it animated by a kind of Brownian movement that deprives it of all structure.
"It [presents] an instantly recognizable and highly detailed portrayal of Brownian movement," Ford says.
Among Einstein's books are Meaning of Relativity (1923, revised 1945); Investigations on the Theory of the Brownian Movement (1926); About Zionism (1931); On the Method of Theoretical Physics (1933); The World as I See It (1934); and The Evolution of Physics (with Leopold Infeld, 1938).