The Collaborative International Dictionary of English v.0.48:
Bismuthic \Bis"muth*ic\, a. (Chem.) Of or pertaining to bismuth; containing bismuth, when this element has its higher valence; as, bismuthic oxide. [1913 Webster]WordNet (r) 3.0 (2006):
bismuthic adj 1: containing bismuth (especially in the pentavalent state)