diffusion coefficient

British

noun

D. Also called: diffusivity. the rate at which a diffusing substance is transported between opposite faces of a unit cube of a system when there is unit concentration difference between them

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diffusion coefficient

The diffusion coefficient is less than one-quadrillionth of a meter-squared per second, a billion times less than what we consider tight in most rocks we use in construction and toxic chemical waste disposal.

From Forbes ● Jan. 1, 2014

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