A dunam (Ottoman Turkish, Arabic: دونم; Turkish: dönüm; Hebrew: דונם; Yiddish: דונאם), also known as a donum or dunum and as the old, Turkish, or Ottoman stremma(citation needed), was the Ottoman unit of area analogous in role (but not equal) to the Greek stremma or English acre, representing the amount of land that could be ploughed by a team of oxen in a day.
[3] The name dönüm, from the Ottoman Turkish dönmek (دونمك, "to turn"), appears to be a calque of the Byzantine Greek stremma and had the same size.
[4] The Dictionary of Modern Greek defines the old Ottoman stremma as approximately 1,270 square metres (13,700 sq ft),[5] but Costas Lapavitsas used the value of 1,600 square metres (17,000 sq ft) for the region of Naoussa in the early 20th century.
In the region of Leskovac, south Serbia, One dulum is equal to 1,600 square metres (17,222 sq ft).
The zeugarion (Turkish çift) was a similar unit derived from the area plowed by a team of oxen in a day.