Roulette

French roulette, roulette, little wheel

Full definition of roulette

(countable and uncountable; plural roulettes)

(uncountable) 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.
(countable) A small toothed wheel used by engravers to roll over a plate in order to produce rows of dots.
(countable) A similar wheel used to roughen the surface of a plate, as in making alterations in a mezzotint.
(countable, geometry) The locus of a point on a plane curve that rolls without slipping along another fixed plane curve.
(stamp-collecting) any of the small incisions on a sheet of stamps, used as an alternative to perforations.