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Backtrack 

The outer, stationary rim of the roulette wheel where the ball is spun. Also called the balltrack. 

Ball 

A small plastic ball, spun in the opposite direction of the wheel's spin. The roulette ball determines the payoffs for each spin each time it land in one of the number pockets. 

Ball Track 

The outer, stationary rim of the roulette wheel where the ball is spun. Also called the backtrack 

Bankroll 

The total amount of money a gambler sets aside to gamble with. 

Biased Numbers 

Numbers produced by Biased Wheels continuing through longterm analysis and so appearing more often then others. 

Biased Wheel 

A roulette wheel that has an imperfection that causes certain numbers or sections of numbers to appear at a higher frequency than probability allows for. 

Big Number 

A number that has hit more than its theoretical average. Longterm "Big Numbers" may be indicative of a Biased Wheel. Such numbers are then known as "Biased Numbers". 


Black Bet 

A wager that the color of the next number will be black. 


Bottom Track 

The slanting, stationary, inner area of a roulette wheel down which the ball slides before bouncing onto the wheel head and into a pocket. 
