First published in 2001 by Dervy, this 358‑page paperback offers a comprehensive overview of alchemical practice through the lens of its specialized terminology. Drawing on historical sources, the work explains key concepts, symbols, and processes that defined the medieval and early modern pursuit of transmutation, presenting them in clear, accessible French. It serves both as a reference for scholars interested in the history of science and as an introductory guide for readers curious about the linguistic foundations of alchemy.