Sébastien Basson, Latinized as Sebastianus Basso, was a French physician and natural philosopher of the beginning of the seventeenth century. He was an early theorist of a matter theory based on both atoms and compounds. His natural philosophy draws on several currents of thought, including Italian Renaissance naturalism, alchemy and Calvinist theology. Basson was an atomist, who, independently from Isaac Beeckman, formed the concept of "molecule".
