Etymology
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impedance (n.)

"hindrance," especially and originally "resistance due to induction in an electrical circuit," 1886, from impede + -ance. The classically correct formation would be *impedience.

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Definitions of impedance

impedance (n.)
a material's opposition to the flow of electric current; measured in ohms;
Synonyms: electric resistance / electrical resistance / resistance / resistivity / ohmic resistance
From wordnet.princeton.edu