<p><strong>Noun</strong></p><ul><li>Physical Chemistry: the separation of crystalloids from colloids in a solution by diffusion through a membrane.</li><li>Biochemistry: the separation of large molecules, as proteins, from small molecules and ions in a solution by allowing the latter to pass through a semipermeable membrane.</li><li>Medicine/Medical: (in kidney disease) the process by which uric acid and urea are removed from circulating blood by means of a dialyzer.</li></ul><p><strong>End of Response</strong></p>