Realgar
Pronunciation : Re*al"gar
Part of Speech : n.
Etymology : [F. r?algar, Sp. rejalgar, Ar. rahj al ghar powder of the mine.] (Min.)
Definition : Defn: Arsenic sulphide, a mineral of a brilliant red color; red orpiment. It is also an artificial product.
Source : Webster's Unabridged Dictionary, 1913