cadmium(redirected from Element 48)
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n. Symbol Cd
A soft, bluish-white metallic element occurring primarily in zinc, copper, and lead ores, that is easily cut with a knife and is used in nickel-cadmium storage batteries, rustproof electroplating, nuclear reactor shields, solders, and in low-friction, fatigue-resistant alloys. Atomic number 48; atomic weight 112.41; melting point 321.1°C; boiling point 767°C; specific gravity 8.65; valence 2. See Periodic Table.
[Latin cadmīa, calamine (the ore of zinc from which cadmium was first extracted as an impurity) (from Greek kadmeia (gē), Theban (earth), from Kadmos, Cadmus; see Cadmus) + -ium.]
cad′mic (-mĭk) adj.
(Elements & Compounds) a malleable ductile toxic bluish-white metallic element that occurs in association with zinc ores. It is used in electroplating, alloys, and as a neutron absorber in the control of nuclear fission. Symbol: Cd; atomic no: 48; atomic wt: 112.411; valency: 2; relative density: 8.65; melting pt: 321.1°C; boiling pt: 767°C
[C19: from New Latin, from Latin cadmīa zinc ore, calamine, referring to the fact that both calamine and cadmium are found in the ore]
cad•mi•um(ˈkæd mi əm)
a white, ductile, divalent metallic element resembling tin, used in plating and in making certain alloys. Symbol: Cd; at. wt.: 112.41; at. no.: 48; sp. gr.: 8.6 at 20°C.
[< German Kadmium (1817) < Latin cadm(īa) zinc oxide]
Symbol Cd A rare, bluish-white metallic element that occurs mainly in small amounts in zinc ores. It is soft and easily cut with a knife. Cadmium is plated onto other metals and alloys to prevent corrosion, and it is used to make rechargeable batteries and nuclear reactors. Atomic number 48. See Periodic Table.
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|Noun||1.||cadmium - a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores|
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.