The Columbia Encyclopedia, Sixth Edition. 2001-07.
Horn of Africa
peninsula, NE Africa, opposite the S Arabia Peninsula. Also known as the Somali Peninsula, it encompasses Somalia and E Ethiopia and is the easternmost extension of the continent, separating the Gulf of Aden from the Indian Ocean. The term Horn of Africa is also used for the surrounding African region, consisting of the countries of Eritrea, Djibouti, Ethiopia, Somalia, and, in some cases, Sudan and other neighboring nations.
