plex

Ultimately from -plex, from Latin plectere

plex (plural plexes)

1. (Canada) A building, such as a duplex or triplex, with a number of apartments (typically two to four) that all open directly to the outside.
   • 2001, Thomas F. McIlwraith, Edward K. Muller, North America: The Historical Geography of a Changing Continent, page 457:

     Most new housing has taken the form of single-family dwellings, not plexes, and levels of home ownership have risen steadily.

   • 2004, Richard Harris, Creeping Conformity: How Canada Became Suburban, 1900-1960, page 34:

     English-style terraced houses or the cheaper type of Montreal plexes that opened directly onto the street made such a way of life possible, but just barely.

2. (computing) A designated portion of a disk, usually set up to mirror some of the contents.
   • 2002, Paul Massiglia, Highly Available Storage for Windows Servers, page 60:

     Striped volumes of mirrored plexes can survive failure of up to half of their disks.

3. (computing) A tree-like structure in which each child can have multiple parents.
   • 1975, James Martin, Computer Data-Base Organization, pages 89-99:

     If a child in a data relationship has more than one parent, the relationship cannot be described as a tree or hierarchical structure. Instead it is described as a ... plex structure.

4. Clipping of multiplex.

Borrowed from Latin plexus or French plexus.

plex n (plural plexuri)

1. plexus