German philologist, born at Kempen, in Posen; studied education at Berlin and Breslau, and was chiefly occupied in teaching till 1870, when he retired in order to devote himself to his literary pursuits; besides classical school-books and some works on philology, he compiled an elaborate Latin dictionary in 4 vols., which has been the basis of the standard English-Latin dictionaries since; b . 1806.