noun
: diffusion of gases through a porous barrier at a rate of speed in direct proportion to the weight of the molecules, being used as the basis of a method of separating isotopes (as fissionable uranium 235 from the nonfissionable uranium 238)
noun
: diffusion of gases through a porous barrier at a rate of speed in direct proportion to the weight of the molecules, being used as the basis of a method of separating isotopes (as fissionable uranium 235 from the nonfissionable uranium 238)
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012