Webster's 1828 Dictionary
DOCIMASTIC
a.[Gr. , to try, essay, examine, proved; to prove. ] Properly, essaying, proving by experiments, or relating to the assaying of metals. The docimastic art is otherwise called metallurgy. It is the art of assaying metals, or the art of separating them from foreign matters, and determining the nature and quantity of metallic substance contained in any ore or mineral.
Webster's 1913 Dictionary
DOCIMASTIC
Doc `i *mas "tic, a. Etym: [Gr. docimastique.]
Defn: Proving by experiments or tests. Docimastic art, metallurgy, or the art of assaying metals; the art of separating metals from foreign matters, and determining the nature and quantity of metallic substances contained in any ore or mineral.