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orpiment

UK:^*^*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈɔːpɪmənt/US:USA pronunciation: respellingUSA pronunciation: respelling(ôr′pə mənt)

or•pi•ment (ôr′pə mənt),USA pronunciation n.

Mineralogya mineral, arsenic trisulfide, As₂S₃, found usually in soft, yellow, foliated masses, used as a pigment.

Latin auripigmentum pigment of gold; see auri-¹, pigment
Old French
Middle English 1350–1400

Collins Concise English Dictionary © HarperCollins Publishers::

orpiment /ˈɔːpɪmənt/ n

a yellow mineral consisting of arsenic trisulphide in monoclinic crystalline form occurring in association with realgar: it is an ore of arsenic. Formula: As₂S₃

Etymology: 14th Century: via Old French from Latin auripigmentum gold pigment

'orpiment' also found in these entries (note: many are not synonyms or translations):

arsenic - orpine - arsenic trisulfide - dimorphite - realgar - red orpiment

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orpiment