Hypertext Webster Gateway: "realgar"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Realgar \Re*al"gar\, n. [F. r['e]algar, Sp. rejalgar, Ar. rahj
al gh[=a]r powder of the mine.] (Min.)
Arsenic sulphide, a mineral of a brilliant red color; red
orpiment. It is also an artificial product.
From WordNet (r) 1.7 (wn)
realgar
n : a rare soft orange mineral consisting of arsenic sulphide;
an important ore of arsenic
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