CasinoEuro’s Guide To Slots – Online Slots Glossary

Coin size, multipliers, and paylines, oh my! Ever come across these words before but couldn’t make heads or tails of what they mean? Then this handy glossary is just for you, giving you the lowdown on some of the most used terms in the world of online slots.

In this article, we’ll dive into the world of online video slots, and with all the different kinds of slot machines available at your fingertips, it’s without a doubt that you’ll encounter a lot of different terminology. While memorising every phrase you come across is not necessary, knowing some of the most commonly used terms will certainly make you feel confident and comfortable when sitting down to your next game. Consider this article your key to understanding the ins and outs of online slot jargon, and after this read, you’ll be relaying terms like a pro.

Getting Started With Online Slots

Online video slots are fun and easy to play, as they do not involve a ton of complex rules which need to be learnt in order to play. A quick spin of the reels is enough for the game to get started. However, there’s more to the world of video slots than one might imagine, and frequent players are sure to notice the abundance of different terms used in the description of the video slot itself, and even amongst online commenters.

While it’s not vital for players to understand all of the jargon in order to play a round or two, having an idea of what these different terms mean will give players somewhat of an advantage, in that they can benefit from a better understanding of how the slots work, and what they can do to have a better game.

Time To Master The Slots

If you are curious to learn more about the terms used in online slots, be it out of sheer curiosity or a thirst for knowledge in order to be a better player, read on to discover all there is to know.

Bet Amount

The bet amount refers to how much is wagered on an individual spin. The amount will differ from slot to slot however, as some games have specific limits on how much you can wager. Most games will allow you to decide how much to wager.

Bonus Round

All players will be delighted to see this term listed on the video slot description, as a bonus round is a special feature which some slots have, which award you with offers, such as free games or free rounds, or even instant cash wins.

Coin Size

The size of the bet, or the coin, on a single spin at the very beginning of a round. This indicates the amount of your initial wager.

To master coins and paylines, we recommend you take a look at our Casino School Tutorials, where you can watch our handy casino guides, helping you become a slot master in no time.

Casino School

Free Spins

Another term that will make players smile is Free Spins. This feature rewards you with a number of free games during your gameplay, but can only be triggered if you have been awarded with a bonus round during the game.


Multipliers fall under the bonus feature category, where players have the chance to multiply their winnings by x2, x3 and so on. This great feature is usually triggered if a player manages to get a number of consecutive successful spins in a row.


The payline is the line which awards you with winnings on a slot machine, according to the winning combinations, as laid out on the game’s paytable. Less modern slots used to have only one payline, but newer, more modern slots may have up to 100 paylines per slot, which keeps things interesting for players.

Progressive Slots

Progressive slots are slots which have a large jackpot prize waiting to be won, and which increase in size with every spin. Want to hit that jackpot? Then you must land on a predetermined winning combination to do so, before anyone else does. Progressive slots also link up with other online casinos, so the prize pool can grow to be massive.


The reels, less often known as the wheels, are the main focus of the game as whatever happens on the reels determines the outcome of your game. The reels are made up of several different pictures, known as symbols, and winning combinations will be displayed on the reels.

Return To Player (RTP)

RTP refers to the payout players can expect to receive from the online slot. These payouts are handed out over time, and different slots will have different percentages of payout return. If a slot happens to have a RTP of 96%, players will on average receive €96 for every €100 wagered.


The Scatter symbol is one of the many symbols which one can find on the reels. Not all games include a Scatter symbol, however the ones that do offer great opportunities for players. Landing on a Scatter symbol means that you will receive payouts in different combinations.


Symbols are all of the different images one can find on the reels. The symbols will change according to what slot machine you are playing, and these symbols are almost always matched to the particular theme of the game. Different symbols will have different features associated with them, according to each slot, and different win amounts for different combinations.


Each online video slot will have a different theme, with the background, music, and symbols on the reels all coming together to create a coherent and enjoyable game for all to enjoy. Themes may vary from classic retro slots, futuristic space-themed slots, action and adventure, or even slots featuring the infamous joker.

Less Worry, More Fun!

easily familiarise themselves with the terms used. Instead, players will better understand how all of these video slots work, what benefits they can reap, and what they should look out for when in the middle of a game.

Choosing which video slot to play is also made easier once you understand a few basic concepts, as reading the descriptions will not be confusing anymore, but instead one can make informed choices on which slot machines suit you the best or which ones are more to your liking. Knowing the ins and outs of the jargon used makes players more intuitive and results in more enjoyable gameplay, where players can simply enjoy the game instead of trying to decipher all the terms they come across. 

If you want to start your casino adventure, sign up today and benefit from exclusive casino bonuses, promotions and over 1,000 games. It’s safe, secure and fun. Join us today.