n. [ Gr. &unr_; hospitable. So named because it contains a number of rare elements. ] (Min.) A brownish black mineral with a metallic luster, found in Norway. It contains niobium, titanium, yttrium, and uranium, with some other metals. [ 1913 Webster ]
n. [ Gr. &unr_; hospitable. So named because it contains a number of rare elements. ] (Min.) A brownish black mineral with a metallic luster, found in Norway. It contains niobium, titanium, yttrium, and uranium, with some other metals. [ 1913 Webster ]
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