roulette

definition: a gambling game in which players bet on which compartment of a revolving wheel a small ball will come to rest in
example:
speech part: noun
synonyms:
definition: a wheel with teeth for making a row of perforations
example:
speech part: noun
synonyms: toothed wheel
definition: a line generated by a point on one figure rolling around a second figure
example:
speech part: noun
synonyms: line roulette

How roulette is being used?