pornography: [19] Pornography denotes etymologically the ‘depiction of prostitutes’; and indeed Webster’s dictionary 1864 defined the word as ‘licentious painting employed to decorate the walls of rooms sacred to bacchanalian orgies, examples of which occur in Pompeii’. Originally in English it was mainly reserved to classical Greek and Roman examples of the genre, and the application to contemporary books, magazines, etc did not emerge strongly until the 1880s. The term originated in Greek, based on pórnē ‘prostitute’, and reached English via French. [pornography etymology, pornography origin, 英语词源]