roulette
noun
Definitions
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.
A small toothed wheel used by engravers to roll over a plate in order to produce rows of dots.
A similar wheel used to roughen the surface of a plate, as in making alterations in a mezzotint.
The locus of a point on a plane curve that rolls without slipping along another fixed plane curve.
verb
Definitions
To separate or decorate by incisions made with a small toothed wheel.
Example: to roulette a sheet of postage stamps