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Online Roulette Glossary and Terminology

 Online Roulette Glossary

If you're new to roulette, it can feel like all the other players are speaking a different language. Learn to speak your fellow players' language by reading through a top list of some of the most important roulette terms you’ll come across.

Action Player

A player who consistently makes large bets.

American Roulette

Unlike European Roulette (which features a single zero spot), American Roulette wheels have one additional pocket with a double zero (00). This brings the total to 38 pockets.


The track on the outer rim of the roulette wheel where the ball spins.


The total sum of money you've set aside to play with.

Biased Numbers

Numbers that occur more frequently than normal, a product of biased wheels.

Biased Wheels

A roulette wheel with defects, damages, or imperfections that can regularly cause "unfair" results.

Big Number

Any number that appears significantly more often than would be predicted by statistics. Used to spot biased numbers and biased wheels.

Bottom Track

The portion of a roulette wheel that rests between the backtrack and the pockets. As the ball falls, it rolls over this region.

Chasing Loses

A strategy where you increase your wagers as you lose in order to increase the value of an inevitable win. This forms the basis of the Martingale System.

Choppy Table

A game where neither the house nor the players seems to have a distinct advantage.


Also known as the Dealer, the croupier oversees the action on the roulette table. In Live Dealer Roulette, online players can interact with a real-life croupier operating in a brick ‘n' mortar casino environment.

Double Zero

The 38th pocket, only found on American wheels (00).


When any given roulette table is losing more than it's winning over a considerable period of time, it is said to be dumping.

En Prison

A rule, generally only found in European roulette games, that safeguards your even-money outside bets when a zero comes up. Learn more on our page about European Roulette here.

European Roulette

A form of roulette that utilizes only 37 pockets with only a single zero (0) spot.

Even Money Bets

A wager that pays out 1/1.

Find out more about even money bets in our guide.

House Edge

The difference between fair odds and the casino's payout. The house edge explains why online roulette casinos make a profit.

La Partage Rule

Much like En Prison rules, when you lose on an outside, even-money bet because a zero is shown, you get half your money back.


The surface of a roulette table where all wagers are placed.


A well-known roulette betting system which involves doubling your bets in the event of a losing spin.


A bet on three numbers that are close together on the wheel but not on the table layout.


To leave a bet standing on the table and to add an additional bet to it for the next round.

Past Posting

Posting a wager after the ball stops, or even just after the croupier says to stop all betting.

Player Clocking

Recording other players' wins and losses to use the Chameleon Tactic.

Premier Roulette Diamond Edition

A popular online roulette variant that features four colors instead of the usual two. Also known as PRDE.

Single-Zero Roulette

See European Roulette.

Surrender Rule

See En Prison.


A collection of chips.


Any strategy, focused on betting patterns, to increase your chances of winning.

Visual Wheel Tracking

Attempting to predict in which pocket the ball will land simply by watching the spinning wheel.


A player's bet.


The spinning wheel into which a ball rolls. Will have 37-38 numbers slots.


The green-colored slot on wheel that forms the 37th slot on a European Roulette table, and the 38th on an American Roulette table. If the ball lands in a zero, all outside bets lose.