molybdenum(redirected from Molybdinum)
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Related to Molybdinum: Molybdenum disulfide
n. Symbol Mo
A hard, silvery-white metallic element used to toughen steels and in corrosion-resistant nickel alloys. An essential trace element in plant nutrition, it is used in fertilizers, dyes, enamels, and reagents. Atomic number 42; atomic weight 95.96; melting point 2,623°C; boiling point 4,639°C; specific gravity 10.22 (at 20°C); valence 2, 3, 4, 5, 6. See Periodic Table.
[New Latin, from earlier molybdena, lead ore, from Latin molybdaena, galena, from Greek molubdaina, from molubdos, lead, probably from Lydian mariwda, dark.]
(Elements & Compounds) a very hard ductile silvery-white metallic element occurring principally in molybdenite: used mainly in alloys, esp to harden and strengthen steels. Symbol: Mo; atomic no: 42; atomic wt: 95.94; valency: 2–6; relative density: 10.22; melting pt: 2623°C; boiling pt: 4639°C
[C19: from New Latin, from Latin molybdaena galena, from Greek molubdaina, from molubdos lead]
mo•lyb•de•num(məˈlɪb də nəm)
a silver-white metallic element, used as an alloy with iron in making hard, high-speed cutting tools. Symbol: Mo; at. wt.: 95.94; at. no.: 42; sp. gr.: 10.2.
[1810–20; alter. of earlier molybdena < Latin molybdaena galena < Greek molýbdaina, literally, piece of lead =mólybd(os) lead + -aina n. suffix]
Symbol Mo A hard, silvery-white metallic element that resists corrosion and remains strong at high temperatures. It is used to harden and toughen steel and to make wire that can withstand high temperatures. Molybdenum is an essential trace element in plant metabolism. Atomic number 42. See Periodic Table.
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|Noun||1.||molybdenum - a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel|
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
molybdenite - a mineral resembling graphite that is valued as the chief source of molybdenum and its compounds