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Medical Term:


Pronunciation: ar′sĕ-nik


  1. A metallic element, atomic no. 33, atomic wt. 74.92159; forms a number of poisonous compounds, some of which are used in medicine.
  2. Denoting the element arsenic or one of its compounds, especially arsenic acid.

Synonym(s): arsenium, ratsbane

[L. arsenicum, G. arsenikon, fr. Pers. zarnik]

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