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Noun: atomic number 33
  1. A very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and in various alloys; found in arsenopyrite and orpiment and realgar
    - arsenic, As

Type of: chemical element, element

Part of: arsenopyrite, herbicide, insect powder, insecticide, mispickel, orpiment, realgar, weed killer, weedkiller