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From: WordNet (r) 2.0

 psychogalvanic response
      n : a change in the electrical properties of the skin in
          response to stress or anxiety; can be measured either by
          recording the electrical resistance of the skin or by
          recording weak currents generated by the body [syn: galvanic
           skin response, GSR, electrodermal response, electrical
           skin response, Fere phenomenon, Tarchanoff phenomenon]