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semipermeable

Pronunciation: sem'e-per'me-a-bel

Definition: Freely permeable to water (or other solvent) but relatively impermeable to solutes. Depending on the context, it has been used to imply impermeability to all solutes except very small uncharged molecules (a cell membrane), or merely impermeability to very large molecules such as proteins (a capillary membrane).

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.

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