impedance

from WordNet (r) 3.0 (2006)

impedance
    n 1: a material's opposition to the flow of electric current;
         measured in ohms [syn: {electric resistance}, {electrical
         resistance}, {impedance}, {resistance}, {resistivity},
         {ohmic resistance}]

from The Collaborative International Dictionary of English v.0.48

Impedance \Im*ped"ance\, n. [Impede + -ance.] (Elec.)
   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 root{R^{2}
   + X^{2}}, where R = ohmic resistance, X = reactance. For an
   inductive circuit, X = 2[pi]fL, where f = frequency and L =
   self-inductance; for a circuit with capacity X = 1 [div]
   2[pi]fC, where C = capacity.
   [Webster 1913 Suppl.]

from The Free On-line Dictionary of Computing (8 July 2008)

impedance

   <electronics, physics> Opposition to flow of alternating
   current.  Impedance consists of {resistance} plus {reactance}
   (capacitive or inductive).  Measured in {Ohms}.

   (2003-12-02)

from Moby Thesaurus II by Grady Ward, 1.0

18 Moby Thesaurus words for "impedance":
      capacitive reactance, clog, cumbrance, electric resistance,
      hindrance, impediment, inductive reactance, magnetic reluctance,
      ohm, ohmage, reactance, reluctance, reluctivity, resistance,
      skin effect, specific reluctance, surface resistance,
      volume resistance