cy·to·mem·brane (s  t -m m br n)n. See cell membrane. |
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| Noun | 1. |  cytomembrane - 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"cell - (biology) the basic structural and functional unit of all organisms; they may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals semipermeable membrane - a membrane (as a cell membrane) that allows some molecules to pass through but not others |
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