roller bolt

from The Collaborative International Dictionary of English v.0.48


   10. (Zool.) Any species of small ground snakes of the family
       {Tortricidae}.
       [1913 Webster]

   {Ground roller} (Zool.), any one of several species of
      Madagascar rollers belonging to {Atelornis} and allied
      genera. They are nocturnal birds, and feed on the ground.
      

   {Roller bolt}, the bar in a carriage to which the traces are
      attached; a whiffletree. [Eng.]

   {Roller gin}, a cotton gin inn which rolls are used for
      separating the seeds from the fiber.

   {Roller mill}. See under {Mill}.

   {Roller skate}, a skate which has small wheels in the place
      of the metallic runner; -- designed for use in skating
      upon a smooth, hard surface, other than ice.
      [1913 Webster]
    

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