roulette Meaning, Definition & Usage

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

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.
(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.
(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.