Index expurgatorius

Index expurgatorius  (in ´dex expurgator ´ius ).—A list of prohibited books. The term employed for the list of books which are allowed to be read after revision by the papal authorities. The I. E. was commenced by Pope Paul IV. (1555), and published by Pope Pius IV. (1559), after organization by the Council of Trent (1545-1563). Press censorship exists in Russia and some other nations.