Roulade :: Roulade (n.) A smoothly running passage of short notes (as semiquavers, or sixteenths) uniformly grouped, sung upon one long syllable, as in Handel's oratorios..
Rouleau :: Rouleau (n.) A little roll; a roll of coins put up in paper, or something resembling such a roll..
Roulette :: Roulette (n.) 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..
Roulette :: Roulette (n.) A small toothed wheel used by engravers to roll over a plate in order to order to produce rows of dots.
Roulette :: Roulette (n.) A similar wheel used to roughen the surface of a plate, as in making alterations in a mezzotint..
Roulette :: Roulette (n.) 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..