impedance(n = noun.phenomenon) electric resistance, electrical resistance, ohmic resistance, resistance, resistivity - a material's opposition to the flow of electric current; measured in ohms;
is a kind of electrical phenomenon
has particulars: ohmage

   The apparent resistance in an electric circuit to the flow of an alternating current, analogous to the actual electrical resistance to a direct current, being the ratio of electromotive force to the current. It is equal to R2 + X2, where R = ohmic resistance, X = reactance. For an inductive circuit, X = 2, where f = frequency and L = self-inductance; for a circuit with capacity X = 1