The study examines two series of French dictionaries from the 17th/18th centuries and the way they interrelate: the "Diction(n)aire universel, Contenant generalement tous les mots francois ...]" by Antoine Furetiere, and the anonymous "Dictionnaire universel francois et latin ...]" called "Dictionnaire de Trevoux" after the town where the first edition appeared. The study takes the form of a >genealogie des dictionnaires