Includes both the popular and the ancient French words and includes terms from both science and art. This "universal dictionary" was compiled by Anthony Furetiere and published in 1690.

Accesses the dictionary of Old French language and all its dialects from the 9th to the 15th century (published by Frédéric Godefroy from 1881-1902). As "the essential element " of Old French lexicography, it's an incomparable dictionary of more than 20 million words. It includes words from the Middle Ages that the modern French language has dropped.

Accesses the French dictionary compiled by Pierre Richelet and published in 1680. It was one of the first of its kind to not only give the meaning of the word, but also the gender of nouns, the main verb conjugations and the pronunciation.