carnotite

1. A soft silvery white toxic metallic element used in steel alloys; it occurs in several complex minerals including carnotite and vanadinite.
   一种软质的银白色有毒金属元素，用于钢合金，存在于许多复合矿物中，包括钒钾铀矿和钒铅矿。
2. Extraction of uranium from carnotite/ tyuyamunite
   从某钾钒铀矿（或钒钙铀矿）中提取铀

noun

1. a yellow radioactive mineral