Sahara

desert" greatest in the world), N. Africa, between Bnrbary ( and the Soudan, touching the Atlantic on W., and Egypt and Nubia on E.; 3000 m. E. to W„ 1000 m. N. to S.; 2,500.000 sq. in.; sand, gravel, barren rocks, with frequent oases or fertile spots; Great Oasis, 90 m. long; inhabited by Arabs, Berbers. Tibbus. etc.; pop. estimated at 1,000,000.