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A measure of the ability of a solution to allow an electric current to flow through it; the reciprocal of resistance. The unit of measure for conductance is the siemens (formerly called mho), which is the reciprocal of the ohm (the unit of measure for resistance). In electrolytic or ionic solutions, the current is carried by ions; liquids such as pure water, glass, and high polymers (such as rubber and cellulose) exhibit poor conductance. See Also: Conductivity Electrical Conductivity Specific Conductance