Look up: orpiment

1. 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 3.49. It melts at 300 °C to 325 °C. 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 w...
   Found on http://en.wikipedia.org/wiki/Orpiment
   
   
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...
   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 or...
   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://wordnetweb.princeton.edu/perl/web
   
   
7. 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
   
   
8. 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
   
   
9. 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
   
   
10. Orpiment
    Orpiment is a secondary mineral with the formulae As2S3 and a relative hardness of 2. It is a rare mineral usually associated with realgar. Orpiment is an important source of industrial arsenic and is used in dyeing. Orpiment can be distinguished from sulphur by its perfect cleavage, and strong smell of garlic (arsenic) when heated.
    Found on http://www.probertencyclopaedia.com/brow