diffusion


dif·fu·sion

noun \di-ˈfyü-zhən\

Definition of DIFFUSION

1
:  the action of diffusing :  the state of being diffused
3
a :  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
b (1) :  reflection of light by a rough reflecting surface
(2) :  transmission of light through a translucent material :  scattering
4
:  the spread of cultural elements from one area or group of people to others by contact
5
:  the softening of sharp outlines in a photographic image
dif·fu·sion·al \-ˈfyü-zhə-nəl\ adjective

Examples of DIFFUSION

  1. <the author's tendency toward diffusion makes the novel a tedious read>

First Known Use of DIFFUSION

14th century

Other Physics Terms

amplitude, centrifugal, centripetal, convection, gradient, hysteresis, kinetic, lase, quantum

dif·fu·sion

noun \dif-ˈyü-zhən\   (Medical Dictionary)

Medical 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

diffusion

noun    (Concise Encyclopedia)

Process by which there is a net flow of matter from a region of high concentration to one of low concentration. It occurs fastest in liquids and slowest in solids. Diffusion can be observed by adding a few drops of food colouring to a glass of water. The scent from an open bottle of perfume quickly permeates a room because of random motion of the vapour molecules. A spoonful of salt placed in a bowl of water will eventually spread throughout the water.

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