Graham's law of diffusion
Also found in: Dictionary, Medical.
Graham's law of diffusion[′grā·əmz ¦lȯ əv di′fyü·zhən]
The law that the rate of diffusion of a gas is inversely proportional to the square root of its density.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.