Roulette Terminology

Roulette has its own language. Terms like straight up, split, en prison, and croupier get tossed around at tables and in game interfaces without much explanation, which can make the whole experience feel like walking into a conversation already in progress.

We're covering everything from inside bets and outside bets to French rules and crypto terms like provably fair.

Why learn roulette terminology

Roulette terminology is just the words players and dealers use for bets, equipment, and table rules. You'll hear inside bets and outside bets constantly. Inside bets go on specific numbers. Outside bets cover bigger groups like red/black or odd/even. Then there are bet names like straight up, split, corner, and street that show exactly where your chips land.

Once you know the vocabulary, the game moves faster. You'll place bets faster, actually understand what the croupier's saying, and follow along when you watch other players. Whether you're at a live table or playing crypto roulette online, the language stays the same across formats and casinos.

We organized everything by category so you can find what you need fast.

Inside bet terms

Inside bets go on the numbered part of the layout. You can bet a single number or a small group of numbers sitting next to each other. The payouts run higher because the probability of winning is lower. A bet on one number pays 35 to 1, but that number only hits roughly once every 37 spins on a European wheel.

Here's how the main inside bets break down:

The five number bet deserves its own callout. It's the only bet on the layout with a worse house edge than everything else. Most experienced players avoid it completely.

Outside bet terms

Outside bets sit around the edges of the numbered grid. They cover bigger groups of numbers, which means they win more often than inside bets. The trade-off is smaller payouts.

• Red or black: You're betting on the color of the winning pocket. Pays 1 to 1.
• Odd or even: A bet on whether the number will be odd or even. Pays 1 to 1.
• High or low: Low covers 1 through 18 (sometimes called manque), high covers 19 through 36 (sometimes called passe). Pays 1 to 1.
• Dozens: The numbers split into three groups of twelve. First dozen is 1-12, second is 13-24, third is 25-36. Pays 2 to 1.
• Column: Three vertical columns run down the layout, each containing twelve numbers. Pays 2 to 1.

One detail that catches new players off guard: all outside bets lose when the ball lands on zero. American wheels have both 0 and 00, so zero hits more often and the house edge goes up.

French roulette terms

You'll see French terminology on European and French roulette tables. The words sound formal, but they describe practical bet types and rules that can actually work in your favor.

• En prison: When zero hits, even-money bets don't lose immediately. Instead, they stay "in prison" for the next spin. If your bet wins on that spin, you get your original wager back without any profit.
• La partage: A simpler version of the same idea. When zero hits, you lose only half your even-money bet instead of all of it.
• Voisins du zéro: An announced bet covering seventeen numbers near zero on the wheel. You'll need nine chips spread across different positions.
• Tiers du cylindre: Covers twelve numbers on the opposite side of the wheel from zero. Takes six chips.
• Orphelins: The eight numbers not included in voisins or tiers. Takes five chips.

Both en prison and la partage cut down the house edge on even-money bets. French roulette wins if you care about the long-term math.

Roulette wheel and table terms

The equipment has its own vocabulary. You won't use most of these words to place bets, but you'll hear them at live tables and see them in game descriptions.

• Croupier: The dealer who spins the wheel, calls out results, and manages the betting process.
• Dolly: A small marker placed on the winning number after each spin. While the dolly sits on the layout, players can't place new bets or remove chips.
• Pockets: The numbered slots around the wheel where the ball lands.
• Ball track: The outer rim where the ball spins before dropping toward the pockets.
• Layout: The printed betting grid on the table surface.
• Wheel head: The rotating center of the wheel that holds all the numbered pockets.

Roulette variant terminology

Each roulette variant has its own rules and wheel design. Your choice of variant changes the terminology and the odds.

Experienced players usually pick European or French roulette because the math works better for them over time. American roulette is still popular, but that extra zero makes a real difference in the long run.

Online roulette terms

Digital roulette has a few terms you won't hear at physical tables. They all deal with how the game creates and confirms results.

• Random number generator (RNG): Software that determines where the ball lands in digital roulette. Regulated games run on RNG systems that independent auditors have tested.
• Live dealer: A real croupier streamed to your screen in real time. You place bets digitally, but the wheel spin happens in a physical studio.
• Provably fair: A cryptographic verification system that lets you confirm each spin was random and untampered. After a round ends, you can check the hash yourself to verify the result wasn't manipulated.

Provably fair technology is common at crypto casinos. It makes things more transparent than traditional online casinos because the verification happens on-chain instead of behind closed doors.

Roulette odds and payout terms

You'll hear these financial terms all the time at roulette tables.

• House edge: The mathematical advantage the casino holds on every bet. On European roulette, it's 2.7%. On American roulette, it's 5.26%.
• Odds: The probability of a specific outcome. A straight up bet has odds of 1 in 37 on a European wheel.
• Payout: What you receive when you win, expressed as a ratio. A 35 to 1 payout means you get 35 units for every 1 unit wagered, plus your original bet back.
• Bankroll: The total amount you've set aside for betting. Managing this well matters more than any individual bet selection.

Roulette dictionary quick reference

Here are more roulette terms you should know, even though they don't come up as much:

• Announced bet: A bet called out verbally and immediately covered with chips on the table.
• Biased wheel: A wheel with physical imperfections that cause certain numbers to hit more frequently. You won't see these much anymore because casinos maintain their equipment better.
• Call bet: Similar to an announced bet, but sometimes placed on credit without chips. Not allowed at all venues.
• Cold numbers: Numbers that haven't appeared recently. Tracking them doesn't change future probabilities.
• Hot numbers: Numbers that have hit frequently in recent spins. Past results don't influence future outcomes.
• Neighbours: The numbers physically next to a target number on the wheel, not on the layout.
• No more bets: The croupier's announcement that betting has closed for the current spin.
• Section bet: Any wager covering a specific section of the wheel rather than positions on the layout.