A domino is a small, oblong tile marked with one or more dots, typically twice as long as it is wide. It is a key element in the game of dominoes, where it is stacked on end to form a line and then tipped so that the rest of the line tips over. Many games are played with these tiles, and a large number of rules and variations exist. The word domino also refers to a person who is in charge of an organization or project.

The domino effect describes the way that one simple action can have much greater and sometimes catastrophic consequences. For example, the dropping of a single domino in water creates waves that spread out and affect everything near it.

When authors are creating scenes in their novels, they often use the domino effect to show how one event can trigger other events that can have a big impact on the plot. For example, a character might start a chain reaction that leads to the death of a villain or an action that can save the day.

Domino is also the name of an online service that helps businesses manage their projects and teams. This platform is offered as self-service and as a fully managed cloud service. It helps businesses scale their business processes and increase collaboration and project delivery speed. It is a great option for businesses that want to increase productivity and get the most out of their team.

A domino is a set of small, oblong pieces, usually numbered from 1 to 6, each with one or more dots. These are normally arranged so that they can be stacked on end to form a straight or curved line, with each domino able to be tipped over by the next one. A domino is normally distinguished from other oblong objects by its distinctive markings or by the fact that it has a central square that divides it visually into two distinct areas, called ends, with a value printed on each. The most common set has a maximum of six pips on each end, although larger sets may have more, ranging up to twelve pips.

Dominoes are used in a variety of games, including blocking and scoring. Other games of a more solitaire nature are also played, such as the popular Concentration variant. These are generally adaptations of card games and were once popular in certain countries to circumvent religious prohibitions against playing cards.

When a domino falls, it converts its potential energy into kinetic energy, which can be transferred to the next domino and cause it to fall as well. The process continues until all the dominoes have fallen. Dominos can be arranged to make complex designs, such as the 15-color rainbow spiral shown here.