Racehorse Keno (Keno)	:	The name by which keno was called prior to 1951, when each number also had the name of a racehorse attached to it.
Rails (Craps)	:	The grooved area at the craps table where players keep their chips when not betting them.
Rail Thief (Craps)	:	A cheat who steals chips from the players' rails.
Rate Card (Keno)	:	The booklet issued by casinos containing the costs and payoffs on tickets having from one to fifteen spots.
Red-Black Bet (Roulette)	:	An outside straight wager on whether the next spin will be a red or black number, paid off at even money.
Reel (Slots)	:	A vertical and continuous holder of the symbols on a slot machine.
Reshuffle (Blackjack)	:	The remixing of the cards by the dealer, sometimes done arbitrarily to harass a player.
Right Bettor (Craps)	:	A player betting with the dice, betting that they'll pass.
Rim Credit	:	Credit given at the gaming tables.
Roll (Craps)	:	A single throw of the dice.A complete series of rolls until the shooter sevens out.
Rouge (Roulette)	:	French for red.
Roulette	:	The name of the game involving a wheel, layout and a ball which spins along the rim of the wheel, finally landing in a number, which is the winner for that spin.
Royal Flush (Video Poker)	:	A hand consisting of an A K Q J 10 of the same suit, the best in poker.
Rule Card (Baccarat)	:	The card that shows the printed rules of play for the game.
Runner (Keno)	:	See Keno Runner
Rush	:	The gambler's term for a series of wins, one after the other, forming a winning streak.