noun, Pathology. 1. the accumulation of excessive ketones in the body, as in diabetic acidosis. Origin of ketosis. 1915-1920.
Climate zones of Africa, showing the ecological break between the hot desert climate of the Sahara Desert (red), the hot semi-arid climate of the Sahel (orange) and the tropical climate of Central and Western Africa (blue).
  The Sahara desert is in northern Africa, where it occupies parts of Algeria, Chad, Egypt, Eritrea, Libya, Mali, Mauritania, Niger, Tunisia, and Western Sahara.he Sahara is the largest hot desert in the world covering 3.6 milllion square miles, but Antarictica covers 5.5 million square miles and has less than 10 inches of precipitat â¦ ion per year.