roulette
    n 1: a line generated by a point on one figure rolling around a
         second figure [syn: roulette, line roulette]
    2: a wheel with teeth for making a row of perforations [syn:
       roulette, toothed wheel]
    3: a gambling game in which players bet on which compartment of
       a revolving wheel a small ball will come to rest in

Roulette \Rou*lette"\, v. t.
   To make short incisions in with a roulette; to separate by
   incisions made with a roulette; as, to roulette a sheet of
   postage stamps.
   [Webster 1913 Suppl.]

Roulette \Rou*lette"\, n. [F., properly, a little wheel or ball.
   See Rouleau, Roll.]
   1. A game of chance, in which a small ball is made to move
      round rapidly on a circle divided off into numbered red
      and black spaces, the one on which it stops indicating the
      result of a variety of wagers permitted by the game.
      [1913 Webster]

   2. (Fine Arts)
      (a) A small toothed wheel used by engravers to roll over a
          plate in order to order to produce rows of dots.
      (b) A similar wheel used to roughen the surface of a
          plate, as in making alterations in a mezzotint.
          [1913 Webster]

   3. (Geom.) the curve traced by any point in the plane of a
      given curve when the latter rolls, without sliding, over
      another fixed curve. See Cycloid, and Epycycloid.
      [1913 Webster]

   4. A small toothed wheel used to make short incisions in
      paper, as a sheet of postage stamps to facilitate their
      separation.
      [Webster 1913 Suppl.]