01 n. Arsenic sesquisulphide, produced artificially as an amorphous lemon-yellow powder, and occurring naturally as a yellow crystalline mineral;…
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1.
Arsenic sesquisulphide, produced artificially as an amorphous lemon-yellow powder, and occurring naturally as a yellow crystalline mineral; -- formerly called auripigment. It is used in king's yellow, in white Indian fire, and in certain technical processes, as indigo printing.(Chem.) Also: auripigment“Our orpiment and sublimed mercurie.” — Chaucer.
Phrases & compounds
Red orpiment —
realgar; the red sulphide of arsenic.
Yellow orpiment —
king's yellow.