Roulette /(?)/

Rou·lette

Roulette

n.
  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.
  2. A small toothed wheel used by engravers to roll over a plate in order to order to produce rows of dots. (Fine Arts)
  3. 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. (Geom.)
  4. A small toothed wheel used to make short incisions in paper, as a sheet of postage stamps to facilitate their separation.

Roulette

v. t.
  1. To make short incisions in with a roulette; to separate by incisions made with a roulette; as, to roulette a sheet of postage stamps.