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1 definition found
 for atomic number 33
From WordNet (r) 3.0 (2006) :

  atomic number 33
      n 1: 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 [syn: arsenic, As, atomic
           number 33]

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