"roulette" in the noun sense
1. roulette, line roulette
a line generated by a point on one figure rolling around a second figure
2. roulette, toothed wheel
a wheel with teeth for making a row of perforations
a gambling game in which players bet on which compartment of a revolving wheel a small ball will come to rest in
Source: WordNet® (An amazing lexical database of English)
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