Hawk Islands, a group of nine volcanic islands in the Atlantic, 800 m. W. of Portugal, and forming a province of it; are in general mountainous; covered with orange groves, of which the chief are St. Michael's and Fayal; and 900 m. W. of it, in the latitude of Lisbon; the climate is mild, and good for pulmonary complaints; they were known to the Carthaginian mariners, but fell out of the map of Europe till rediscovered in 1431.