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1 definition found
 for Switch back
From The Collaborative International Dictionary of English v.0.48 :

  Switch \Switch\, n. [Cf. OD. swick a scourage, a whip. Cf.
     Swink, Swing.]
     1. A small, flexible twig or rod.
        [1913 Webster]
  
              Mauritania, on the fifth medal, leads a horse with
              something like a thread; in her other hand she holds
              a switch.                             --Addison.
        [1913 Webster]
  
     2. (Railways) A movable part of a rail; or of opposite rails,
        for transferring cars from one track to another.
        [1913 Webster]
  
     3. A separate mass or trees of hair, or of some substance (at
        jute) made to resemble hair, worn on the head by women.
        [1913 Webster]
  
     4. (Elec.) A device for shifting an electric current to
        another circuit, or for making and breaking a circuit.
        [Webster 1913 Suppl.]
  
     Safety switch (Railways), a form of switch contrived to
        prevent or lessen the danger of derailment of trains.
  
     Switch back (Railways), an arrangement of tracks whereby
        elevations otherwise insurmountable are passed. The track
        ascends by a series of zigzags, the engine running
        alternately forward and back, until the summit is reached.
        
  
     Switch board (Elec.), a collection of switches in one piece
        of apparatus, so arranged that a number of circuits may be
        connected or combined in any desired manner.
  
     Switch grass. (Bot.) See under Grass.
        [1913 Webster]

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