Search the Dictionary

yellow, in white Indian fire, and in certain technical processes, as indigo printing. Our orpiment and sublimed mercurie. Chaucer. Red orpiment, realgar; the red sulphide of arsenic. -- Yellow orpiment, king's yellow.

Red orpiment. Coxe.

und native, but usually combined with silver, cobalt, nickel, iron, antimony, or sulphur. Orpiment and realgar are two of its sulphur compounds, the first of which is the true arsenticum of the ancients. The element and its compounds are active poisons. Specific gravity from 5.7 to 5.9. Atomic weight. Symbol As.…

See Orpiment. [Obs.]

m smalt; -- called also blue bice. Green bice is prepared from the blue, by adding yellow orpiment, or by grinding down the green carbonate of copper. Cooley. Brande & C.

Arsenic sulphide, a mineral of a brilliant red color; red orpiment. It is also an artificial product.

A mixtire of caustic lime and orpiment, or tersulphide of arsenic, -- used in the depilation of hides. Knight.

A depilatory made of orpiment and quicklime, and used by the Turks. See Rhusma.

s of sulphur to two of the other ingredient; -- formerly called also sesquisulphuret; as, orpiment, As2S3 is arsenic sesquisulphide.

e four substances, sulphur, sal ammoniac, quicksilver, or arsenic (or, according to some, orpiment). The four spirits and the bodies seven. Chaucer.

Native sulphide of arsenic, including sandarach, or realgar, and orpiment.