Source : Webster's Revised Unabridged Dictionary (1913)

   10. (Zo["o]l.) Any species of small ground snakes of the
       family {Tortricid[ae]}.

   {Ground roller} (Zo["o]l.), 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.

Skate \Skate\, n. [D. schaats. Cf. {Scatches}.]
   A metallic runner with a frame shaped to fit the sole of a
   shoe, -- made to be fastened under the foot, and used for
   moving rapidly on ice.

         Batavia rushes forth; and as they sweep, On sounding
         skates, a thousand different ways, In circling poise,
         swift as the winds, along, The then gay land is
         maddened all to joy.                     --Thomson.

   {Roller skate}. See under {Roller}.

Source : WordNet®

roller skate
     n : a shoe with pairs of rollers fixed to the sole

roller skate
     v : travel on shoes with steel or rubber rollers attached to
         their soles; "In some fashionable restaurants, the
         waiters roller skate around"