bis·mu·thic /bɪzˈməθɪk, ˈmjuθɪk/ 形容詞
  Bis·muth·ic a. Chem. Of or pertaining to bismuth; containing bismuth, when this element has its higher valence; as, bismuthic oxide.
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  bismuthic
       adj : containing bismuth (especially in the pentavalent state)