What is the singular of dice?

Die is the singular form of dice. It comes from the French word des, a plural word for the same objects.

In English, the most common way to make nouns plural is to add an S. If die followed that rule, its plural form would be dies. However, English is full of irregular plurals. Along with wolf, cactus, and appendix, die does not follow the normal pattern. If you roll dice, you are rolling two or more game pieces. If you roll a die, you are only using one piece.