1) Molybdenum mineral 2) Orthorhombic mineral 
Molybdite is the naturally occurring mineral form of molybdenum trioxide MoO3. It occurs as yellow to greenish needles and crystallizes in the orthorhombic crystal system. == Discovery and occurrence == Molybdite was first described in 1854 for and occurrence in quartz veins in the Knöttel area of Krupka, Krušné Hory Mountains in the Ústí Reg...
• (n.) Molybdic ocher.
Mo·lyb'dite noun (Min.) Molybdic ocher. 
Molybdenum oxide, tri-