Diffusion

The act of diffusing, or the state of being diffused; a spreading; extension; dissemination; circulation; dispersion.

The act of passing by osmosis through animal membranes, as in the distribution of poisons, gases, etc., through the body. Unlike absorption, diffusion may go on after death, that is, after the blood ceases to circulate.

(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

the property of being diffused or dispersed