What does "roulette" mean?

Roulette: (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.

Additional senses

  1. 2.(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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