noun
or diffusion constant
: the quantity of a substance that in diffusing from one region to another passes through each unit of cross section per unit of time when the volume-concentration gradient is unity — called also diffusivity
noun
or diffusion constant
: the quantity of a substance that in diffusing from one region to another passes through each unit of cross section per unit of time when the volume-concentration gradient is unity — called also diffusivity
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012