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Arsenic :: Arsenic (n.) One of the elements, a solid substance resembling a metal in its physical properties, but in its chemical relations ranking with the nonmetals. It is of a steel-gray color and brilliant luster, though usually dull from tarnish. It is very brittle, and sublimes at 356¡ Fahrenheit. It is sometimes found 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 arsenicum of

Orpiment :: Orpiment (n.) Arsenic sesquisulphide, produced artificially as an amorphous lemonyellow 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..

Rhusma :: Rhusma (n.) A mixtire of caustic lime and orpiment, or tersulphide of arsenic, -- used in the depilation of hides..

Sesquisulphide :: Sesquisulphide (n.) A sulphide, analogous to a sesquioxide, containing three atoms of sulphur to two of the other ingredient; -- formerly called also sesquisulphuret; as, orpiment, As2S3 is arsenic sesquisulphide..

Zarnich :: Zarnich (n.) Native sulphide of arsenic, including sandarach, or realgar, and orpiment..

Auripigment :: Auripigment (n.) See Orpiment.

Rusma :: Rusma (n.) A depilatory made of orpiment and quicklime, and used by the Turks. See Rhusma..

Realgar :: Realgar (n.) Arsenic sulphide, a mineral of a brilliant red color; red orpiment. It is also an artificial product..

Spirit :: Spirit (n.) Any one of the four substances, sulphur, sal ammoniac, quicksilver, or arsenic (or, according to some, orpiment)..

Andarac :: Andarac (n.) Red orpiment.

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