Roulette vocabulary mixes placements, settlement rules and mathematics. Use these definitions to identify the question, then follow the linked guide for a worked answer.
Wagers and placement
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| Term | Meaning |
|---|---|
| Straight up / plein | One selected pocket, ordinarily paying 35 to 1 profit |
| Split / cheval | A legal two-number selection, ordinarily paying 17 to 1 |
| Street | A row of three grid numbers, ordinarily paying 11 to 1 |
| Corner / carré | Four boxes meeting at an intersection, ordinarily paying 8 to 1 |
| Six line / sixain | Two adjacent streets, ordinarily paying 5 to 1 |
| Dozen | 1–12, 13–24 or 25–36, ordinarily paying 2 to 1 |
| Column | One long grid column, ordinarily paying 2 to 1 |
| Even-money wager | A 1-to-1 profit payout, such as red |
| Unit | A chosen stake amount used to describe a wager or sequence |
See inside bets and outside bets for placement.
Returns and chance
Stake: amount placed at risk. Profit payout: winnings excluding the original stake. Total return: profit plus any returned stake. Net result: all returns minus the entire round's stake.
Probability: modeled chance of an event. Odds against: losing possibilities relative to winning possibilities. House edge: expected loss divided by stake under stated rules. RTP: expected total return divided by stake, expressed as a percentage. It describes an average, not a payment owed to one session.
Turnover: stakes added across rounds. Variance: spread around a mean. Drawdown: decline from a previous balance peak. Percentile: a point in an ordered distribution. The odds library separates these questions.
Wheel and zero rules
Racetrack: diagram following wheel order. Neighbors: adjacent wheel pockets. Voisins, tiers, orphelins and jeu zéro: named sector packages described in racetrack bets.
La partage: half-loss settlement on zero for eligible even-money wagers. En prison: a procedure leaving an eligible wager barred after zero, with later settlement governed by the table's rules. Neither automatically applies to every outside selection.
Sessions and models
Progression: rule changing the next stake. Stop condition: a preset reason to end a run, such as a spin limit or unaffordable stake. Seed: value initializing a deterministic random sequence. Independent spins: a model in which previous outcomes do not change next-spin pocket probabilities.
Read simulation methodology before interpreting an experiment, or how to play for one complete round.
Sources and scope
- Rules of Play for Table Games, Roulette. British Columbia Lottery Corporation. Double-zero standard payout table and placement. European pocket count is independently verified from native Wheel.
Publication date: not stated. Checked 2026-11-07.
- Roulette probability derivation. Amenti Labs LLC. Fair independent pockets, fixed payouts, full outside loss on zero. Formula and all supported bets regression tested.
Publication date: 2026-11-07. Checked 2026-11-07.
- Live Roulette: game rules and special bets. bet365. Operator-specific single-zero game rules; pages1–3 verify voisins exact trio/corner/split matrix, tiers six splits, orphelins enplein/àcheval variants and jeu0 four positions. Used as a published conventional package, not a universal rule or endorsement. Includes returned stake versus true profit.
Publication date: not stated. Checked 2026-11-08.