Adjacent Words

cobalt blue definitions

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WordNet (r) 3.0 (2005)

n
1: a shade of blue tinged with green [syn: greenish blue, aqua, aquamarine, turquoise, cobalt blue, peacock blue]
2: greenish-blue pigment consisting essentially of cobalt oxide and alumina [syn: cobalt blue, cobalt ultramarine]

Merriam Webster's

noun Date: 1835 1. a greenish-blue pigment consisting essentially of cobalt oxide and alumina 2. a strong greenish blue

Webster's 1913 Dictionary

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. 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.