Etymology
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roulette (n.)

"game of chance involving a revolving disk on a table," 1745; earlier "small wheel" (1734), from French roulette "gambling game played with a revolving wheel," an extended sense; "small wheel," from Old French roelete "little wheel" (12c.), formed on model of Late Latin rotella, diminutive of Latin rota "wheel" (see rotary).

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Definitions of roulette

roulette (n.)
a line generated by a point on one figure rolling around a second figure;
Synonyms: line roulette
roulette (n.)
a wheel with teeth for making a row of perforations;
Synonyms: toothed wheel
roulette (n.)
a gambling game in which players bet on which compartment of a revolving wheel a small ball will come to rest in;
From wordnet.princeton.edu