Online slot machine glossary: Key terms you should know before playing

Between paylines, wilds, and multipliers, the jargon of slot machines can quickly become confusing for new players. That’s why we’ve created this online slot machine glossary, specially designed for Belgian players who want to better understand key terms before launching their first spins. Whether you play on PC or mobile, this guide will help you during your first sessions and assist you in decoding the most common symbols.

On Loco Casino, the Belgian site offering a wide selection of slot games, mastering this vocabulary will allow you to fully enjoy the experience and make more informed choices.

The essential vocabulary to understand online slot machines

Understanding the terminology of online slot machines is crucial for any player wanting to make informed choices. This online slot machine glossary brings together the most common words and expressions you'll encounter in the majority of games available on Belgian casinos.

Knowing these terms will help you better read paytables, identify special symbols, and adapt your strategy according to how the slots work.

Free Spins

This bonus allows you to spin the reels without betting your own money. It is often triggered by a combination of Scatter symbols and may come with multipliers, Wilds, or special reels. Perfect for maximizing your winnings without risk.

Respins

Respins offer a new free spin of one or more reels after an initial spin. They can be triggered manually or automatically and sometimes help complete a near-win combination or activate a bonus feature.

Scatters

Unlike regular symbols, Scatters do not need to align on a payline. They typically trigger bonuses like Free Spins or special games, provided they appear in sufficient number on the screen.

Progressive Jackpot

This is a prize that increases with every bet placed by players, until one lucky player hits it. Some jackpots can reach several hundreds of thousands of euros—or even more. They are usually found on specific slot machines.

Reels

Reels are the vertical columns that spin on each turn. Most online slot machines have between 3 and 5 reels, each displaying different symbols. These reels determine the outcome of each spin.

Paylines

Paylines show where the symbols must align to win. Some slots use fixed paylines, while others use a “ways to win” system offering thousands of potential combinations. Learn more about how paylines work.

Maximum Bet

This is the highest amount you can stake per spin. Each game also defines a minimum bet. This allows players to adjust their budget while still unlocking premium features enabled by high wagers.

Maximum Win

The maximum win is the highest payout you can earn on a single spin. It’s often expressed as a multiplier of the stake (e.g. x5,000). Games with progressive jackpots can easily exceed this fixed limit.

Paytable

The paytable displays the value of each symbol and winning combinations. Low-paying symbols are usually cards or letters, while premium ones (like diamonds or characters) offer higher rewards. Learn how to read a paytable effectively.

Autoplay

This feature lets you launch multiple spins automatically based on defined criteria (number of spins, win/loss limits). Ideal for players who prefer watching the game without clicking every time.

Random Number Generator (RNG)

The RNG ensures that each spin is 100% random. It is a certified software system essential to the fairness of casino games. No result can be predicted or manipulated.

RTP (Return to Player)

Also known as the payout percentage, this indicates how much a game pays back to players on average. An RTP of 97% means €97 are theoretically returned for every €100 wagered. The higher the RTP, the better. Learn more in our RTP guide.

Volatility

Volatility reflects the level of risk in a slot game. High volatility slots offer bigger but less frequent wins, while low volatility slots provide smaller wins more often.

Wild Symbol

The Wild substitutes for other symbols (except Scatters) to complete winning combinations. It can be standard, sticky, or expanding. See how Wild symbols boost your chances in modern slots.

Bonus Buy Feature

Some games let you purchase direct access to Free Spins. This triggers the bonus round instantly, like in Sugar Rush Dice. However, availability depends on local gambling regulations.

Sticky Wilds

This type of Wild remains locked on the reels for several spins, potentially leading to a chain of wins. The Dog House Dice Show is a well-known slot with powerful sticky Wilds.

Cascading Reels

When you win, the symbols involved disappear and are replaced by new ones. This enables a sequence of wins in a single spin.

Conclusion: Play with confidence

Thanks to this online slot machine glossary, you now have the keys to better understand the rules, symbols, and features that shape your gaming experience. By mastering these terms, you enhance not only your user experience but also your ability to identify the casino games that suit your play style.

On Loco Casino, one of the key players in the online casino in Belgium space, this knowledge will help you choose between high volatility slots, games with generous RTP, or those packed with bonus features. Playing with insight maximizes your chances of enjoying every session while staying in control.

Want to go even further? Don’t hesitate to explore our other guides—like how to improve your chances on slot machines or understand how paylines work.