Murexide
Pronunciation : Mu*rex"ide
Part of Speech : n.
Etymology : [L. murex the purple fish, purple.] (Chem.)
Definition : Defn: A crystalline nitrogenous substance having a splendid dichroism, being green by reflected light and garnet-red by transmitted light. It was formerly used in dyeing calico, and was obtained in a large quantities from guano. Formerly called also ammonium purpurate.
Source : Webster's Unabridged Dictionary, 1913