separation of substances in solution by means of their unequal diffusion through semipermeable membranes
"The laboratory experiment relied on dialysis to separate the salt ions from the protein molecules by passing them through a semipermeable membrane."
A method of separating molecules or particles of different sizes by differential diffusion through a semipermeable membrane.
"The new lab equipment uses dialysis to separate large protein aggregates from the small salt ions in the solution."