co·balt /ˈkoˌbɔlt/
 鈷,鈷類顏料,由鈷制的深藍色


 co·balt /ˈkoˌbɔlt/ 名詞
 鈷


 Co·balt n.
 1. Chem. A tough, lustrous, reddish white metal of the iron group, not easily fusible, and somewhat magnetic. Atomic weight 59.1. Symbol Co.
 Note: ☞ It occurs in nature in combination with arsenic, sulphur, and oxygen, and is obtained from its ores, smaltite, cobaltite, asbolite, etc. Its oxide colors glass or any flux, as borax, a fine blue, and is used in the manufacture of smalt. It is frequently associated with nickel, and both are characteristic ingredients of meteoric iron.
 2. A commercial name of a crude arsenic used as fly poison.
 Cobalt bloom. Same as Erythrite.
 Cobalt blue, a dark blue pigment consisting of some salt of cobalt, as the phosphate, ignited with alumina; -- called also cobalt ultramarine, and Thenard's blue.
 Cobalt crust, earthy arseniate of cobalt.
 Cobalt glance. Min. See Cobaltite.
 Cobalt green, a pigment consisting essentially of the oxides of cobalt and zinc; -- called also Rinman's green.
 Cobalt yellow Chem., a yellow crystalline powder, regarded as a double nitrite of cobalt and potassium.

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 cobalt
      n : a hard ferromagnetic silver-white bivalent or trivalent
          metallic element; a trace element in plant and animal
          nutrition [syn: Co, atomic number 27]


 cobalt
 Symbol: Co
 Atomic number: 27
 Atomic weight: 58.993
 Light grey transition element. Some meteorites contain small amounts of
 metallic cobalt. Generally alloyed for use. Mammals require small amounts
 of cobalt salts. Cobalt-60, an artificially produced radioactive isotope
 of Cobalt is an important radioactive tracer and cancer-treatment agent.
 Discovered by G. Brandt in 1737.