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cobalt 音标拼音: [k'ob ,ɔlt] n. 钴,钴类颜料,由钴制的深蓝色 钴,钴类颜料,由钴制的深蓝色 cobalt n 1: a hard ferromagnetic silver- white bivalent or trivalent metallic element; a trace element in plant and animal nutrition [ synonym: { cobalt}, { Co}, { atomic number 27}] Cobalt \ Co" balt\ ( k[= o]" b[ o^] lt; 277, 74), n. [ G. kobalt, prob. fr. kobold, kobel, goblin, MHG. kobolt; perh. akin to G. koben pigsty, hut, AS. cofa room, cofgodas household gods, Icel. kofi hut. If so, the ending - old stands for older - walt, - wald, being the same as - ald in E. herald and the word would mean ruler or governor in a house, house spirit, the metal being so called by miners, because it was poisonous and troublesome. Cf. { Kobold}, { Cove}, { Goblin}.] 1. ( Chem.) A tough, lustrous, reddish white metal of the iron group, not easily fusible, and somewhat magnetic. Atomic weight 59. 1. Symbol Co. [ 1913 Webster] 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. [ 1913 Webster] 2. A commercial name of a crude arsenic used as fly poison. [ 1913 Webster] { 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. [ 1913 Webster] |
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