diffusion diameter

diffusion diameter

[di′fyü·zhən dī‚am·əd·ər]
(statistical mechanics)
For a gas, the diameter of identical hard spheres that display the same diffusion as that observed for the molecules of the actual gas when their motion is treated classically.
References in periodicals archive ?
Incubation continued until test samples showed well-defined dark circles with diffusion diameters (d) of 2.
Full browser ?