or  Mil*lon reagent  n :  a solution that is usu. made by dissolving mercury in concentrated nitric acid and diluting with water and that when heated with phenolic compounds gives a red coloration used as a test esp. for tyrosine and proteins containing tyrosine
 
Millon, Auguste-Nicolas-Eugène (1812-1867), French chemist and physician. Millon devoted his career to the military, first as a surgeon and then as a chemist. In 1848 he demonstrated that urea could be quantitatively analyzed, and in 1849 he formulated the solution now known as Millon's reagent.
 
 
 
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