diffusion
dif·fu·sion
noun \dif-ˈyü-zhən\Definition of DIFFUSION
1
: the process whereby particles of liquids, gases, or solids intermingle as the result of their spontaneous movement caused by thermal agitation and in dissolved substances move from a region of higher to one of lower concentration
2
a : reflection of light by a rough reflecting surface b : transmission of light through a translucent material
—dif·fu·sion·al \-ˈyüzh-nəl, -ən-əl\ adjective
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