In Aramaic, the language which most Jews spoke in the early first century, hagel dema means "field of blood." This picture depicts the Greek-Orthodox monastery of St. Onophrius and the remains of a building called Akeldama (Aceldama), which was used as a burial place for foreigners (and non-Jews) until the early part of the nineteenth century.
Some scholars believe this is the "potter's field" which the authorities purchased with the "blood money" Judas gave back after he was filled with remorse for betraying Jesus.
Image online, courtesy ChristusRex.org, the Vatican's web site.