Tetrapolis

(from the article `ancient Greek civilization`) ...site in Classical and Hellenistic times, seems to have been anomalously attributed to a city trittys; and an ancient local organization known as ...
Found on http://www.britannica.com/eb/a-z/t/30

Tetrapolis

[Attica] Tetrapolis (Greek: Τετράπολις) comprised one of the twelve districts into which Attica was divided before the time of Theseus. The district was on a plain in the northeastern part of Attica and contained four cities: Marathon (Μαραθών), Probalinthus (Προβάλινθος), Tricorythus (Τρικόρυθος), and ...
Found on http://en.wikipedia.org/wiki/Tetrapolis_(Attica)

tetrapolis

group of four cities
Found on http://phrontistery.info/t.html

tetrapolis

tetrapolis A district of four cities; a state or political division consisting of four towns.
Found on http://www.wordinfo.info/words/index/info/view_unit/1721/4
No exact match found