The Collaborative International Dictionary of English v.0.48:
Vanadinite \Va*nad"i*nite\, n. (Min.) A mineral occurring in yellowish, brownish, and ruby-red hexagonal crystals. It consists of lead vanadate with a small proportion of lead chloride. [1913 Webster]WordNet (r) 3.0 (2006):
vanadinite n 1: a mineral consisting of chloride and vanadate of lead; a source of vanadium