dispersion

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dispersion dispersion medium

Main Entry: dis·per·sion
Pronunciation: dis-pr-zhn, -shn
Function: noun
1 : the act or process of dispersing : the state of being dispersed
2 : the separation of light into colors by refraction or diffraction with formation of a spectrum; also : the separation of radiation into components in accordance with some varying characteristic (as energy)
3 a : a dispersed substance b : a system consisting of a dispersed substance and the medium in which it is dispersed : COLLOID 2b -- called also disperse system