realgar Meaning, Definition & Usage

  1. noun a rare soft orange mineral consisting of arsenic sulphide; an important ore of arsenic

WordNet

Re*al"gar noun
Etymology
F. réalgar, Sp. rejalgar, Ar. rahj al ghar powder of the mine.
Definitions
  1. (Min.) Arsenic sulphide, a mineral of a brilliant red color; red orpiment. It is also an artificial product.

Webster 1913