Roulette word meaning and definition

[noun] a gambling game in which players bet on which compartment of a revolving wheel a small ball will come to rest in
[noun] a wheel with teeth for making a row of perforations
[noun] a line generated by a point on one figure rolling around a second figure

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

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