Dictionary.net

The chiefs of a conquering nomadic race from the East who took Memphis, and rendered the whole of Egypt tributary. The dates of their invasion and conquest have been computed at from 2567 to 2500 B.C., and they are stated by some to have ruled for from 260 to 500 years, when the Egyptians rose and expelled them. Attempts have been made to connect their expulsion with the narrative in the book of Exodus. Called also HYCSOS or HYKSHOS.

Ancient kings ruling in Egypt, sometimes called Hycsos. They are supposed to have been expelled on the rise of the eighteenth dynasty, about B.C. 1625.