diffusion

n. distribution, dispersion, scattering; permeation of a region by fluid

This article is about the physical mechanism of diffusion. For alternative meanings, see diffusion (disambiguation). Diffusion is the net movement of particles from an area of high concentration to an area of low concentration. For example, diffusing molecules will move randomly between areas of high and low concentration but because there are more molecules in the high concentration region, more molecules will leave the high concentration region than the low concentration one. Therefore, there will be a net movement of molecules from high to low concentration. Initially, a concentration gradient—a smooth decrease in concentration from high to low—will form between the two regions. As time progresses, the gradient will grow increasingly shallow until the concentrations are equalized.
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Diffusion /dif·fu·sion/ 1. the process of becoming diffused, or widely spread. 2. the spontaneous movement of molecules or other particles in [more]Diffusion - Community and Resources

Noun
1. (physics) the process of diffusing; the intermingling of molecules in gases and liquids as a result of random thermal agitation
(hypernym) natural process, natural action, action, activity
(hyponym) osmosis
(classification) physics, physical science, natural philosophy
2. the spread of social institutions (and myths and skills) from one society to another
(hypernym) spread, spreading
(classification) mythology
3. the property of being diffused or dispersed
(synonym) dissemination
(hypernym) distribution, dispersion
4. the act of dispersing or diffusing something; "the dispersion of the troops"; "the diffusion of knowledge"
(synonym) dispersion, dispersal, dissemination
(hypernym) spread, spreading
(hyponym) crop-dusting, spraying
(derivation) diffuse, spread, spread out, fan out

n. diffusion, distribution, dispersion, scattering