"Resembling that of a falcon or hawk, especially in respect of sight or temperament; sharp-eyed, hawklike", Mid 19th cent.; earliest use found in Thomas Carlyle (1795–1881), author, biographer, and historian. From classical Latin accipitr-, accipiter accipiter + -al. Compare scientific Latin accipitralis.[accipitral etymology, accipitral origin, 英语词源]