dispersion

noun

• the action or process of distributing things or people over a wide area:some seeds rely on birds for dispersion
• the state of being dispersed over a wide area:the general dispersion of Hellenistic culture
• Ecology the pattern of distribution of individuals within a habitat.
• (also the Dispersion)another term for diaspora.
• a mixture of one substance dispersed in another medium.
• Physics the separation of white light into colors, or the separation of any radiation according to wavelength.
• Statistics the extent to which values of a variable differ from a fixed value such as the mean.