COBALT
cobalt, Co, atomic number
(noun) a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition
Source: WordNet® 3.1
Etymology
Noun
cobalt (usually uncountable, plural cobalts)
A chemical element (symbol Co) with an atomic number of 27: a hard, lustrous, silver-gray metal.
Cobalt blue.
Proper noun
Cobalt
A village in Connecticut
A town in Ontario.
An unincorporated community in Idaho.
Source: Wiktionary
Co"balt (; 277, 74), n. Etym: [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.)
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition
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Word of the Day
30 April 2024
NURSE
(verb) treat carefully; “He nursed his injured back by lying in bed several hours every afternoon”; “He nursed the flowers in his garden and fertilized them regularly”
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