or·pi·ment (ôr p -mnt)n. Arsenic trisulfide, As2S3, a yellow mineral used as a pigment. [Middle English, from Old French, from Latin auripigmentum : aurum, gold + pigmentum, pigment; see pigment.] |
orpiment [ˈɔːpɪmənt]
n
(Earth Sciences / Minerals) a yellow mineral consisting of arsenic trisulphide in monoclinic crystalline form occurring in association with realgar: it is an ore of arsenic. Formula: As2S3
[via Old French from Latin auripigmentum gold pigment]
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | orpiment - a yellow mineral occurring in conjunction with realgar; an ore of arsenic As, atomic number 33, arsenic - a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition |
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