King James Bible Dictionary

The Eulaus of the Greeks; a river of Susiana. It was probably the eastern branch of the Choasper (Kerkhan), which divided into two branches some 20 miles above the city of Susa. Hence Daniel (8:2, 16) speaks of standing "between the banks of Ulai", i.e., between the two streams of the divided river.

strength; fool; senseless

A river of Chaldea.
Daniel 8:2; Daniel 8:16

(pure water) is mentioned by Daniel, (Daniel 8:2,16) as a river near to Susa, where he saw his vision of the ram and the he-goat. It has been generally identified with the Eul'us of the Greek and Roman geographers, a large stream in the immediate neighborhood of that city. The Eulseus has been by many identified with the Choaspes, which is undoubtedly the modern Kerkhah , an affluent of the Tigris, flowing into it a little below Kurnah . Recent surveys show that the Choarspes once divided into two streams about 20 miles above Susa. The eastern was the Ulai. This bifurcation explains (Daniel 8:16)