Or"pi*ment (?), n. [F., fr. L. auripigmentum; aurum gold + pigmentum
pigment. Cf. Aureate, Pigment,
Orpin, Orpine.]
(Chem.) 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
orpiment, realgar; the red sulphide of arsenic. -- Yellow orpiment, king's yellow.
Hear it pronounced