arsenic trisulfide, AsS, having a lemon-yellow color and a resinous luster: it is used as a pigment
Origin of orpimentOld French from Classical Latin auripigmentum, pigment of gold: see auric and pigment
Arsenic trisulfide, As2S3, a yellow mineral used as a pigment.
Origin of orpimentMiddle English from Old French from Latin auripigmentum aurum gold pigmentum pigment ; see pigment .
(countable and uncountable, plural orpiments)