カジノ＆スロット用語集

An optional increased bet (usually 25% more) that improves the chances of triggering the bonus feature.

A feature that automatically spins the reels a set number of times at your chosen bet level.

The total amount of money a player has set aside for gambling. Effective bankroll management is key to responsible gaming.

The number of coins wagered per payline per spin. Higher bet levels increase both potential wins and losses.

The total amount wagered on a single spin, calculated as coin value × coins per line × active paylines.

A special game mode triggered by specific symbol combinations, offering enhanced winning opportunities like free spins or pick-and-click games.

An option to instantly trigger the bonus round by paying a premium (typically 80-100x your bet), bypassing the need to land scatter symbols.

A mechanic where winning symbols disappear and new ones fall into place, potentially creating chain reactions of wins. Also called Tumbling or Avalanche reels.

A winning mechanic where groups of matching symbols touching horizontally or vertically form wins, instead of traditional paylines.

The monetary value assigned to each coin in a slot. Adjusting coin value changes the real-money cost per spin.

A version of the slot that uses virtual credits instead of real money, allowing you to test the game risk-free.

A wild symbol that expands to cover an entire reel when it lands, increasing winning potential significantly.

Bonus rounds where you spin the reels without wagering your own money. Often triggered by scatter symbols and may include multipliers.

A casino promotion awarding a set number of free spins on specific slot games, often as part of a welcome package.

An optional feature after a win that lets you risk your payout for a chance to double or quadruple it.

A slot format using a grid of symbols instead of traditional spinning reels, with wins formed through clusters or specific patterns.

The company that designs, develops, and distributes slot games. Major providers include Pragmatic Play, Play'n GO, and Microgaming.

How often a slot machine lands a winning combination. A 30% hit frequency means roughly 1 in 3 spins produces a win.

A bonus feature where triggering symbols lock in place while remaining positions respin to potentially add more matching symbols.

The mathematical advantage the casino has over the player. House edge = 100% - RTP. A 4% house edge means the casino keeps $4 of every $100 wagered.

The largest possible payout in a slot game. Can be fixed (set amount) or progressive (growing with each bet placed).

The highest possible wager amount allowed on a single spin. Usually required to qualify for progressive jackpots.

The highest possible payout from a single spin, usually expressed as a multiple of your bet (e.g., 5,000x).

A game mechanic by Big Time Gaming offering up to 117,649 ways to win per spin through dynamic reel sizes. Licensed to many providers.

The lowest possible wager amount on a single spin. Important for bankroll management and casual play.

A feature that multiplies your winnings by a specified factor. A 3x multiplier triples your payout.

A bonus credited without requiring any deposit. Usually small amounts ($5-$25) or free spins, given just for registering.

Lines across the reels where matching symbols must land to form a winning combination. Modern slots can have 1 to over 100,000 ways to win.

A chart within the slot showing the value of each symbol, winning combinations, bonus features, and game rules.

An interactive bonus game where you select from hidden items to reveal prizes, multipliers, or additional features.

A jackpot that increases every time the game is played but not won. Can reach millions across networked machines.

Wild symbols that appear at random positions on the reels, added by the game engine outside of normal symbol placement.

The specific configuration of symbols on each reel. Different reel sets may be used in base game vs. bonus rounds.

The vertical columns on a slot machine that spin and display symbols. Most modern slots have 5 reels, though some have 3, 6, or 7.

Additional spins awarded after certain events, usually with enhanced features like locked wilds or expanding symbols.

Practices and tools designed to keep gambling safe: deposit limits, session time limits, self-exclusion, and reality checks.

The software algorithm that ensures every spin result is completely random and independent. Tested and certified by independent labs.

The theoretical percentage of all wagered money a slot pays back to players over time. A 96% RTP means $96 returned for every $100 wagered on average.

A special symbol that triggers bonus features regardless of its position on the reels. Usually activates free spins when 3+ land anywhere.

A voluntary program allowing players to ban themselves from gambling for a set period, available at most licensed casinos.

The visual and narrative design of a slot — Egyptian, fantasy, fruit, etc. Themes affect aesthetics but not game mechanics or RTP.

Symbols that can split into multiple copies of themselves, effectively increasing the number of symbols on a reel.

Multiple wild symbols stacked on top of each other on a single reel, covering 2 or more positions.

A wild symbol that stays in place for one or more subsequent spins, particularly valuable during free spins rounds.

Another term for volatility. Describes how much and how often a slot pays out relative to its theoretical RTP.

Measures the risk level of a slot game. Low volatility = frequent small wins. High volatility = rare but large payouts.

The number of times you must play through a bonus before withdrawing. 30x on $100 = must wager $3,000 total.

A payline system where matching symbols on adjacent reels from left to right pay regardless of row position. Common: 243, 1024, or 117,649 ways.

A promotional offer for new players, typically matching their first deposit (e.g., 100% up to $500) plus free spins.

A symbol that substitutes for other symbols to help form winning combinations, similar to a joker in card games.