GNU Collaborative International Dictionary of English

Found 2 definitions

1.       
   Roulette , n. [F., properly, a little wheel or ball. See Rouleau, Roll.]
   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
   (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
   (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
   A small toothed wheel used to make short incisions in paper, as a sheet of postage stamps to facilitate their separation.
   Webster 1913 Suppl.
         
       

2.       
   Roulette, 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.