semipermeable membrane(redirected from Selective permeability)
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A substance which allows solvent molecules to pass through but not solute molecules.
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|Noun||1.||semipermeable membrane - a membrane (as a cell membrane) that allows some molecules to pass through but not others|
cell membrane, cytomembrane, plasma membrane - a thin membrane (a double layer of lipids) enclosing the cytoplasm of a cell; proteins in the membrane control passage of ions (like sodium or potassium or calcium) in and out of the cell; "all cells have a cell membrane"