, a hydronym and toponym of Persia.
1. A river of the Elburz Mountains region of northwestern Persia.
It runs from the south-east northwestwards from a source in the mountains west of Tehran and joins the Ḳi̊zi̊l Üzen [q.v.] at Mand̲j̲īl, the combined waters then making up the Safīd Rūd [q.v.], which flows into the Caspian Sea. The upper reaches of the S̲h̲āh Rūd are known as the S̲h̲āh Rūd-i Ṭālaḳān, to distinguish it from its right-bank affluent the S̲h̲āh Rūd-i Alamūt. This last rises near the Tak̲h̲t-i Sulaymān peak and is hemmed in by high…