Source : Webster's Revised Unabridged Dictionary (1913)

Iatrochemistry \I*a`tro*chem"is*try\, n.
   Chemistry applied to, or used in, medicine; -- used
   especially with reference to the doctrines in the school of
   physicians in Flanders, in the 17th century, who held that
   health depends upon the proper chemical relations of the
   fluids of the body, and who endeavored to explain the
   conditions of health or disease by chemical principles.