orpiment in British English
(ˈɔːpɪmənt)
noun
a yellow mineral consisting of arsenic trisulphide in monoclinic crystalline form occurring in association with realgar: it is an ore of arsenic. Formula: As2S3
Word origin
C14: via Old French from Latin auripigmentum gold pigmentorpiment in American English
(ˈɔrpɪmənt)
noun
arsenic trisulfide, As2S3, having a lemon-yellow color and a resinous luster: it is used as a pigment
Word origin
OFr < L auripigmentum, pigment of gold: see auric & pigmentImage oforpiment
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