Online slot machines: the complete lexicon

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Each sector is its specific vocabulary and the online casino is no exception to the rule! Not easy to understand when you are a beginner player but to progress, it will be imperative to familiarize yourself with some often English symbols and terms of online slot machines. We offer you in this small glossary a definition of the terms most often used to evolve in the increasingly complex world of Online slots.


Functionality to program the automatic recovery of a slot machine.


One of the great assets of online slot machines. It can be free towers (free spins) or additional credits. We will also talk about promotions.

Both Ways

A special bonus that doubles the bet and activates the earnings of each line from right to left, in addition from the usual left to right.

Cluster Pays

Or payment by cluster. It is a group of symbols to unlock gains.


or wagering. Conditions set by the casino and defining the sum of money to play or the number of bets to be carried out with power Remove the gains generated thanks to the bonuses. Consult our full article on the conditions for putting the slots.

Free Spins

Or free towers. One of the bonuses offered by online casinos, it allows you to play for free on a slot machine during a defined period of time. Consult our article dedicated to Free Spins.

Bonus game

An alternative mini-game to unlock by making a certain combination on an online slot machine. The key, additional gains often but also new functions integrated into the main game.

Payment lines

Also called gain lines. These are the invisible lines of a slot machine on which symbols align. The most modern machines can have several dozen payment lines.


Or bet. Amount placed on a slot machine throw. The bets must be between a minimum amount and a maximum amount, which can oscillate from $ 0.01 to a few hundred euros.

3D slot machine

A real must From the casino sector, the 3D slot machine allows an even more immersive experience thanks to faithful graphics reproducing the atmosphere of a real casino.

Multiplayer slot machine

To spice up the experience a little, multiplayer slot machines offer the possibility of playing several simultaneously on the same machine. The operation remains identical to a Slot Classic, but the concept is a great way to enjoy new game sessions.

Multiligne slot machine

Machine with more than two payment lines. In opposition to the first machines which generally contained only one line of combinations.

Gradual slot machine

An slot machine offering Progressive jackpots Renowned to increase over time and thus reach colossal sums. Book of the Dead (Play’N GO) ou Mega Moungah (Microgaming) are among these machines.

Video slot machine

These are the slot machines that are found online and more and more in terrestrial casinos. The glass screen and the paper rolls have been replaced here by multimedia graphics.


A machine incorporating Megaways technology, which allows to offer up to 117.649 payment lines.

Mode avalanche

A special mode by which the same launch can unlock multiple gains. In this specific case, the winning symbols disappear to make way for other symbols and so on. We usually find avalanche mode on Gonzo’s Quest ET Sugar Pop 2.


To be unlocked by making a special combination, it allows you to increase the amount of an bet or earnings pocketed by the player.

Pay Table

A table to consult regularly and which lists precisely the gains put into play, the winning combinations and the requirements of putting associated with each gain.


These are the specific requirements imposed by an online casino, in order to be able to withdraw the gains obtained from the slot machines through a bonus. the playthrough include the wagering.


free spins, obtained not using a bonus but unlocking a special function in an online slot machine.


or Reels in English. It is on the rolls that the symbols forming the combinations appear.


Or dispersion symbol. A bonus symbol to unlock superior gains or free towers.


English term designating slot machines.

free towers

see Free Spins.


The equivalent of a joker. The symbol Wild Present itself in several different forms and allows you to replace any other symbol in order to form winning combinations.

Wild fixe

or Sticky Wild. It has the particularity of staying frozen in the same location during a defined number of laps.

Wild mobile

or Shifting Wild. This has the possibility of moving on the rolls.

Wild expansif

or Expanding Wild. An interesting variant capable of stretching the entire length of the roller associated with it, to create a maximum of combinations.

Wilds stacked

or Stacked Wilds. A real stack of symbols Wild Designed to cover the different rows with an online slot machine.

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