Roulette

noun
1.
a game of chance played at a table marked off with numbers from 1 to 36, one or two zeros, and several other sections affording the players a variety of betting opportunities, and having in the center a revolving, dishlike device (roulette wheel) into which a small ball is spun to come to rest finally in one of the 37 or 38 compartments, indicating the winning number and its characteristics, as odd or even, red or black, and between 1 and 18 or 19 and 36.
2.
a small wheel, especially one with sharp teeth, mounted in a handle, for making lines of marks, dots, or perforations:
engravers’ roulettes; a roulette for perforating sheets of postage stamps.
3.
Philately. a row of short cuts, in which no paper is removed, made between individual stamps to permit their ready separation.
verb (used with object), rouletted, rouletting.
4.
to mark, impress, or perforate with a roulette.
noun
1.
a gambling game in which a ball is dropped onto a spinning horizontal wheel divided into 37 or 38 coloured and numbered slots, with players betting on the slot into which the ball will fall
2.

a toothed wheel for making a line of perforations
a tiny slit made by such a wheel on a sheet of stamps as an aid to tearing it apart

3.
a curve generated by a point on one curve rolling on another
verb (transitive)
4.
to use a roulette on (something), as in engraving, making stationery, etc
roulette