A yellow to orange or brown mineral used as a molybdenum ore

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Wulfenite \Wul"fen*ite\, n. [So named after F. X. Wulfen, an Australian mineralogist.] (Min.) Native lead molybdate occurring in tetragonal crystals, usually tabular, and of a bright orange-yellow to red, gray, or brown color; -- also called yellow lead ...

Wiktionary Word definitions in Wiktionary
n. (context mineralogy English) An orange mineral, lead molybdate, leadmolybdenumoxygen 4 , found in lead veins.

Wikipedia Word definitions in Wikipedia
Wulfenite is a lead molybdate mineral with the formula Pb Mo O . It can be most often found as thin tabular crystals with a bright orange-red to yellow-orange color, sometimes brown, although the color can be highly variable. In its yellow form it is sometimes ...

WordNet Word definitions in WordNet
n. a yellow to orange or brown mineral used as a molybdenum ore