Glossary

The return percentage calculated from the returns and stakes recorded in a specified body of play.

Used in: Volatility, variance and the words around a game’s statistics

A testing firm on the Gambling Commission’s published list, allowed to carry out third-party testing of games.

Used in: Can casinos adjust the RTP on slot machines? The RNG, and the game rules it is confused with

Promotional funds governed by an offer’s conditions; not necessarily withdrawable cash.

Used in: What your casino account messages mean: a decoder

A game whose software varies the chance or value of a win depending on recent results, to hold a target RTP. Not permitted online under RTS 7A.

Used in: Can casinos adjust the RTP on slot machines? The RNG, and the game rules it is confused with

The proportion of a qualifying stake counted towards a stated wagering requirement.

Used in: Wagering, turnover and the other bonus words that need separating

The title that identifies the product in ordinary interface reading.

Used in: Online casino terms: a guide to commonly confused pairs

The casino’s expected retained share, complementary to RTP when both are defined on the same rules and stake basis.

Used in: Volatility, variance and the words around a game’s statistics, Return is not the same as profit, What slot has 99% RTP?: definition, and the term it is confused with

A named prize whose trigger, eligibility and size are defined in a game’s rules.

Used in: Can casinos adjust the RTP on slot machines? The RNG, and the game rules it is confused with, Online casino terms: a guide to commonly confused pairs

A software change that may affect a game’s fairness. It needs external retesting by an approved test house.

Used in: Can casinos adjust the RTP on slot machines? The RNG, and the game rules it is confused with

The sum of observations divided by their count; a measure of the centre, not the spread.

Used in: Volatility, variance and the words around a game’s statistics

The middle observation once values are ordered, or the mean of the two middle observations when the count is even.

Used in: Volatility, variance and the words around a game’s statistics

Five settled rounds are not automatically five sessions or five different games; one login might contain visits to more than one title.

Used in: Online casino terms: a guide to commonly confused pairs

A count of how often an event appeared in a particular dataset; a short run does not replace the model.

Used in: Volatility, variance and the words around a game’s statistics

The table in a game’s rules that says what each winning outcome pays. Part of the game rules, not the RNG.

Used in: Can casinos adjust the RTP on slot machines? The RNG, and the game rules it is confused with, Volatility, variance and the words around a game’s statistics

A model’s likelihood of an event, as distinct from how often the event appeared in a particular dataset.

Used in: Volatility, variance and the words around a game’s statistics

A prize that grows from a share of stakes until it is won. Its growth is written into the game rules.

Used in: Can casinos adjust the RTP on slot machines? The RNG, and the game rules it is confused with

The largest value minus the smallest value in a set; it uses the extremes only.

Used in: Volatility, variance and the words around a game’s statistics

A theoretical average proportion of stakes returned as prizes over many plays; not a session guarantee.

Used in: Return is not the same as profit, Can casinos adjust the RTP on slot machines? The RNG, and the game rules it is confused with, Online casino terms: a guide to commonly confused pairs

A unit of play under the game’s rules; preserve the exact round identifier if the product supplies one.

Used in: Online casino terms: a guide to commonly confused pairs

The share of stakes a game is designed to pay back over a very large number of plays, shown as a percentage. Set by the game rules.

Used in: Can casinos adjust the RTP on slot machines? The RNG, and the game rules it is confused with

A grouping of play within a defined boundary; the RTS glossary’s gaming session starts with real-money play and ends on exiting a game.

Used in: Online casino terms: a guide to commonly confused pairs

The amount put at risk in a particular bet.

Used in: Return is not the same as profit, Can casinos adjust the RTP on slot machines? The RNG, and the game rules it is confused with, Wagering, turnover and the other bonus words that need separating, Online casino terms: a guide to commonly confused pairs

The square root of variance, returned to the original units of the observations.

Used in: Volatility, variance and the words around a game’s statistics

The designed return percentage under the relevant game conditions.

Used in: Volatility, variance and the words around a game’s statistics

A visible state, documented as that; it does not establish the beginning or end of a session.

Used in: Online casino terms: a guide to commonly confused pairs

The total amount staked on a game. Actual RTP is win divided by turnover.

Used in: Can casinos adjust the RTP on slot machines? The RNG, and the game rules it is confused with, Wagering, turnover and the other bonus words that need separating

A measure of dispersion based on squared distances from the mean, expressed in squared units.

Used in: Volatility, variance and the words around a game’s statistics

How dispersed a game’s outcomes are; as a label, a description supplied by the publisher rather than a universal unit.

Used in: Volatility, variance and the words around a game’s statistics, Can casinos adjust the RTP on slot machines? The RNG, and the game rules it is confused with, What slot has 99% RTP?: definition, and the term it is confused with

Measures of how widely results swing around the average. See the Casino Lexicon entry on game statistics words.

Used in: Can casinos adjust the RTP on slot machines? The RNG, and the game rules it is confused with

A condition specifying a total value of qualifying bets before specified funds become withdrawable.

Used in: Wagering, turnover and the other bonus words that need separating

A request to transfer eligible funds out of an account through a supported method.

Used in: Can casinos adjust the RTP on slot machines? The RNG, and the game rules it is confused with, Wagering, turnover and the other bonus words that need separating, Online casino terms: a guide to commonly confused pairs