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impedance

/ɪmˈpiːdn̩s/
noun
  1. The act of impeding; that which impedes; a hindrance.

  2. A measure of the opposition to the flow of an alternating current in a circuit; the aggregation of its resistance, and inductive and capacitive reactances; the ratio of voltage to current treated as complex quantities.

  3. A quantity analogous to electrical impedance in some other energy domain

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