(πλέθρον/pléthron). A p. (Latin iugerum) is a Greek unit of length of 100 feet, corresponding to 1/6 στάδιον/stádion (Stadion). Depending on the underlying length of the foot (Pous), it has a length of c. 27-35 m; an Attic plethron comes to 31 m. In Homeric epic, plethron is synonymous with the length of a furrow; plethron can also be found there as a unit of area for a piece of land 100 feet square (cf. also Hom. Il. 23,164: ἑκατόμπεδον ἔνθα καὶ ἔνθα).
1 F. Hultsch, Griechische und römische Metrologie, 21882, 28.