Glossary
Rail
Watching a casino game without participating as a player.
Random Number Generator
A mathematical algorithm ensuring fair and unpredictable outcomes in casino games.
Re-Bet
Wagering the same amount as in the previous game.
Reality Check
A responsible gambling feature that tracks a player’s session duration and monitors wins or losses during play.
Reels
The spinning components of a slot machine displaying symbols, determining a bet’s success based on where they stop. Common online slots feature three, five, seven, or nine reels.
Refer-a-Friend Bonus
A promotional reward for players who bring new customers to a casino or sportsbook, typically granted as a bonus or benefit after the referred friend signs up and deposits.
Reload Bonus
Bonus funds awarded to players for making additional deposits after their initial one.
Responsible Gambling
Industry initiatives promoting transparency, fairness, and integrity in gambling operations, aimed at protecting minors and vulnerable players from harm, including addiction, while raising awareness of risks.
Responsible Gambling Tools
Features and resources, like deposit limits, bet caps, session timers, reality checks, cool-off periods, self-exclusion, self-assessment tests, and support organization contacts, designed to help players manage their gambling responsibly.
Return
The total amount a player wins from a bet.
Reversed forecast
A horse racing bet selecting two horses to finish in the top two, regardless of which takes first or second.
Risk Premium
The extra return a bettor expects for taking on higher risk.
Roulette
A casino game with a spinning numbered wheel and a matching table, where players wager on whether a ball will land in a red or black numbered slot. Bets are placed against the house, with popular variants including American, European, French, Auto, and Mini Roulette.
Round Robin
A betting system combining multiple parlays from a set of selections, ensuring some return even if not all bets win.
RTP or Return to Player
The average percentage of wagered money a casino game is expected to pay back to players over time.
Run down
A complete list of betting lines for a specific date, sport, or time period.
Runline
A baseball betting spread used as an alternative to money line odds.
Runners
In sports betting, either horses competing in a race or, more broadly, the bettors placing wagers.