A duplex is two connected apartments that are deeded as one property. A halfplex is half of an interconnected house. It can be one-family or multifamily structure. The term "half duplex" also applies to houses that are only partially occupied, such as when no tenant is living in one side of the house. Duplexes and triplexes are types of multiple dwellings (more than two rooms). A quad will have four rooms. A quint has five rooms, and so on. The word "duplex" comes from the Latin word duplex meaning "having two parts". This describes a building with two units instead of one. Although "duplex" can apply to a residence, it most often refers to an apartment building. In North America, a semi-detached house is a single-family dwelling that is divided into 2 sections: 1 section containing the common areas shared by both families and another section containing separate entrances for each household. Each section may have its own bathroom if desired. However, this division is not necessary for 2 families to live together in harmony.