Diffusion
Part of speech: noun
Definition: the act of diffusing or dispersing something, or the property of being diffused or dispersed; dispersion the scattering of light by reflection from a rough surface, or by passage through a translucent medium the intermingling of the molecules of a fluid due to random thermal agitation the spread of cultural or linguistic practices, or social institutions, in one or more communities Exchange of airborne media between regions in space in an apparently random motion of a small scale. the movement of water vapor from regions of high concentration (high water vapor pressure) toward regions of lower concentration.
Example sentence: Every one must understand that, whatever be the evil of slavery, it is not increased by its diffusion. Every one familiar with it knows that it is in proportion to its sparseness that it becomes less objectionable. Wherever there is an immediate connexion between the master and slave, whatever there is of harshness in the system is diminished.
Dispersion
Part of speech: noun
Definition: The state of being dispersed; dispersedness.A process of dispersing.The degree of scatter of data.The separation of visible light by refraction or diffraction.The removal of inflammation.