orpiment

Noun
  1. A yellow mineral occurring in conjunction with realgar;
    An ore of arsenic (synset 114712992)
    is a type of: mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
    substance holonym: arsenic, as, atomic number 33 - 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

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