A more thorough explanation:

Moiety refers to half of something. It comes from an old French word “moitié,” which means half.

In real estate, the term “moiety” was used to refer to one-half interest in a property. For example, if a person owned a house with their spouse, they each had a moiety or half-interest in the property.

Joint tenants, who are two or more people who own land by a joint title, are also “said to hold by moieties.” This means that they each have a roughly equal part in the property.

For instance, if two friends bought a piece of land together, they would each have a moiety or half-interest in the property.

Overall, the term “moiety” refers to any set of roughly equal parts, but it is most commonly used to describe a half-interest in something.