Jacques Dubois (1478 - January 14, 1555), also known as Jacobus Sylvius in Latin, was a French anatomist. Dubois was known for his hard work, and eloquence. In Paris, he studied languages and mathematics; but feeling that the rewards were inadequate, he abandoned scholarship for medicine. He was the first professor to teach anatomy of a human corpse, in France. His biggest intellectual flaw was his blind reverence for the ancient authors. He treated the writings of Galen as if they were wholly sacred, he would believe that if a corpse showed structures different from those described by Galen, the error was not in the texts, but in the corpse. He is remembered for his work on the classification, identification and nomenclature of muscles. He coined such terms as cystic, gastric, popliteal and mesentery. He died in 1555 at the age of 76.