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3.135.183.19
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2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Third rail. Electric Railways (a) The third rail used in the third-rail system. (b) An electric railway using such a rail. [Colloq.]
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From: WordNet (r) 2.0

 third rail
      n : a rail through which electric current is supplied to an
          electric locomotive