orpiment


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Related to orpiment: arsenic, cinnabar

or·pi·ment

 (ôr′pə-mənt)
n.
Arsenic trisulfide, As2S3, a yellow mineral used as a pigment.

[Middle English, from Old French, from Latin auripigmentum : aurum, gold + pigmentum, pigment; see pigment.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

orpiment

(ˈɔːpɪmənt)
n
(Minerals) a yellow mineral consisting of arsenic trisulphide in monoclinic crystalline form occurring in association with realgar: it is an ore of arsenic. Formula: As2S3
[C14: via Old French from Latin auripigmentum gold pigment]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.orpiment - a yellow mineral occurring in conjunction with realgar; an ore of arsenic
As, atomic number 33, arsenic - a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
It was circular in form, carpeted with mats of shining straw, ceiled with beams, enriched with fleurs-de-lis of gilded metal with interjoists in color; wainscoated with rich woods sown with rosettes of white metal, and with others painted a fine, bright green, made of orpiment and fine indigo.
Now I remember comrades - Old playmates on new seas - Whenas we traded orpiment Among the savages.
The breccias locally contain orpiment and realgar (arsenic sulfides), which are commonly found in many major Carlin-style gold deposits.
Microscopic study for realgar and orpiment is planned for the interval containing greater than 10,000 ppm arsenic.
Naturally enough, carbon produces black lacquer; arsenic sulphide, known as orpiment, which is found in volcanic hot springs, produces yellow and mercury sulphide, the distinctive deep coral red of cinnabar.
(01691) produces black lacquer; arsenic sulphide, known as orpiment, which is found in volcanic hot springs, produces yellow and mercury sulphide, the distinctive deep coral red of cinnabar.
Arsenic minerals orpiment and realgar are reported from Chitral state.
38, this element is present only in the red ink, suggesting the use of cinnabar with accessory minerals, such as realgar ([As.sub.4][S.sub.4]) and/or orpiment ([As.sub.2][S.sub.3]) [37].
It could also be coloured by the addition of carbon producing black; orpiment (arsenic sulphide) for yellow and cinnabar (mercury sulphide) the distinctive brick red, which quickly became preferred for carved pieces like Sotheby's dish.
These rocks contain a range of ore minerals, including pyrite, arsenopyrite, marcasite, realgar, orpiment, cinnabar, and stibnite.
Waalkes, "Mineral arsenicals in traditional medicines: Orpiment, realgar, and arsenolite," The Journal of Pharmacology and Experimental Therapeutics, vol.
Under this approach, As(V) was reduced to As (III) directly or indirectly (via [H.sub.2]S) by the SRB and orpiment ([As.sub.2][S.sub.3]) generated within the bioreactor.