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.
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.
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.
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.
Rou*lette" (?), n. A small toothed
wheel used to make short incisions in paper, as a sheet of postage
stamps to facilitate their separation.