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  1. Oxford American Dictionary

    Donnan equilibrium

    • IPA[ˌdänən ˌēkwəˈlibrēəm]

    美式

    • n.
      the equilibrium reached between two ionic solutions separated by a semipermeable membrane when one or more of the kinds of ion present cannot pass through the membrane. The result is a difference in osmotic pressure and electrical potential between the solutions.

    • noun: Donnan equilibrium