noun🔗ShareA 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."At the casino, she watched the roulette wheel spin, hoping the ball would land on her lucky number. "gameentertainmentbetChat with AIVocabulary GamePractice Reading
noun🔗ShareA small toothed wheel used by engravers to roll over a plate in order to produce rows of dots."The engraver used a small roulette to create evenly spaced dots on the metal plate. "arttechnicalmachinewritingChat with AIVocabulary GamePractice Reading
noun🔗ShareA similar wheel used to roughen the surface of a plate, as in making alterations in a mezzotint."The artist used a roulette to roughen the plate before adding the final details to the mezzotint. "artutensilChat with AIVocabulary GamePractice Reading
noun🔗ShareThe locus of a point on a plane curve that rolls without slipping along another fixed plane curve."The intricate design left by a Spirograph toy is a good example of a roulette, created as a pen traces a path while one plastic gear rolls around another. "mathtechnicalChat with AIVocabulary GamePractice Reading
noun🔗ShareAny of the small incisions on a sheet of stamps, used as an alternative to perforations."The stamp collector carefully examined the edge of the old stamp, noting that instead of perforations, it had a roulette. "stationerywritingChat with AIVocabulary GamePractice Reading
noun🔗ShareA cylindrical curler for the hair."My mother uses a special hair roulette to curl her daughter's hair for school pictures. "appearancestyleitemutensilChat with AIVocabulary GamePractice Reading
verb🔗ShareTo separate or decorate by incisions made with a small toothed wheel."to roulette a sheet of postage stamps"artstyleappearanceChat with AIVocabulary GamePractice Reading
