Socotra (10), an island off the E. coast of Africa, 148 m. NE. of Cape Guardafui, over 70 m. long and 20 m. broad; it is mountainous, surrounded by a margin of plain land from 2 to 4 m. broad; is comparatively barren; is inhabited by Mohammedans, who rear sheep, goats, and cattle; exports aloes, hides, and pearls; the sultan is a feudatory of Britain.