diffusion -- ((physics) the process in which there is movement of a substance from an area of high concentration of that substance to an area of lower concentration)
diffusion -- (the spread of social institutions (and myths and skills) from one society to another)
dissemination, diffusion -- (the property of being diffused or dispersed)
dispersion, dispersal, dissemination, diffusion -- (the act of dispersing or diffusing something; "the dispersion of the troops"; "the diffusion of knowledge")
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