- The separation of smaller molecules from larger molecules or of dissolved substances from colloidal particles in a solution by selective diffusion through a semipermeable membrane. (noun)
- Hemodialysis. (noun)
- The separation of small molecules from large molecules and colloids in a solution by the selective diffusion of the small molecules through a semipermeable membrane (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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