orpiment noun. ['ɔ:pɪm(ǝ)nt] LME.
[Old & mod. French from Latin auripigmentum, from aurum gold + pigmentum PIGMENT.]
Arsenic trisulphide, a bright yellow monoclinic mineral occurring naturally as prismatic crystals or (more usu.) massive deposits, or made artificially, and formerly used as a dye and artist's pigment (also more fully yellow orpiment). Also (in full red orpiment) = REALGAR.

[TahlilGaran] English Dictionary ▲