Look up: orpiment

1. 
   Orpiment
   Orpiment has the formulae As2S3 and a relative hardness of 2. It is a rare mineral usually associated with realgar. Used in dyeing but is poisonous. Distinguished from sulphur by its perfect cleavage.
   Found on http://www.encyclo.co.uk/nol.php
   
   
2. 
   orpiment
   [n] - a yellow mineral occuring in conjunction with realgar
   Found on http://www.webdictionary.co.uk/definitio
   
   
3. 
   orpiment
   an arsenic trisulphide, used in paint making, yellow in colour Category: Chemistry
   Found on http://www.mijnwoordenboek.nl/definition
   
   
4. 
   Orpiment
   Or'pi·ment noun [ French, from Latin auripigmentum ; aurum gold + pigmentum pigment. Confer Aureate , Pigment , Orpin , Orpine .] (Chemistry) 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 y ...
   Found on http://www.encyclo.co.uk/webster/O/34
   
   
5. 
   orpiment
   <chemistry> 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. 'Our orpiment and sublimed mercurie.' (Chaucer) Red orpim ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
6. 
   orpiment
   noun a yellow mineral occuring in conjunction with realgar; an ore of arsenic
   Found on http://wordnet.princeton.edu/perl/webwn?
   
   
7. 
   Orpiment
   `Orpiment`, As2S3, is a common monoclinic arsenic sulfide mineral. It has a Mohs hardness of 1.5 to 2 and a specific gravity of 3.46. It melts at 300 ðC to 325 ðC. Optically it is biaxial with refractive indices of a=2.4, b=2.81, g=3.02. Orpiment is an orange to yellow mineral that is found worldwide, and occurs as a sublimation product in volcanic fumaroles, low temperature hydrothermal veins, hot springs and as a byproduct of the decay of anot...
   Found on http://en.wikipedia.org/wiki/Orpiment
   
   
8. 
   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.
   Found on http://thinkexist.com/dictionary/meaning
   
   
9. 
   orpiment
   the transparent yellow mineral arsenic sulfide (As2S3), formed as a hot-springs deposit, an alteration product (especially from realgar), or as a ... [1 related articles]
   Found on http://www.britannica.com/eb/a-z/o/33
   
   
10. 
    orpiment
    orpiment 1. A bright yellow arsenic sulfide mineral used in dyeing or tanning. 2. Etymology: from Middle English, previously from Old French, and before from Latin auripigmentum, from aurum, 'gold' + pigmentum, 'pigment'.
    Found on http://www.wordinfo.info/words/index/inf