The term disco was first used in print in an article by Vince Aletti in the September 13, 1973 edition of Rolling Stone Magazine titled "Discotheque Rock '72: Paaaaarty!"
Discotheque -- Borrowed 1954 from Fr. discothèque "nightclub with recorded music for dancing," also "record library," borrowed 1932 from It. discoteca "record collection, record library," coined 1927 from disco "phonograph record" + -teca "collection," probably on model of biblioteca "library."
Disco -- 1964, Amer.Eng. shortening of discotheque; sense extended 1975 to the kind of music played there.