(anc. geog.), a citadel of Mefopotamia, situated between the Tigris and Nibilis; taken by force for Ur of the Chaldees, the residence of Abraham. What seems to confirm this is, that from Ur to Haran, the other residence of the patriarch, the road lies directly for Palestine. And it is no objection that Ur is said to be in Mefopotamia; because the parts next the Tigris were occupied by the Chaldeans, as seems to be confirmed from Acts vii. 2, 4. It is called Orche, in Strabo; Orchoe, in Ptolemy.