Index Librorum Prohibitorum Hear it!

Index Librorum Prohibitorum Definition

In·dex· Li·bro·rum· Pro·hibi·to·rum (in′deks′ lē brō′ro̵̅o̅m′ prō hib′ē tō′ro̵̅o̅m′)

noun

Historical a list of books that the Roman Catholic Church forbade its members to read (except by special permission) because the books were judged to be dangerous to faith or morals

Etymology: ModL, index of prohibited books