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co·balt 
Audio Help [koh-bawlt] Pronunciation Key
Audio Help [koh-bawlt] Pronunciation Key –noun
| a silver-white metallic element with a faint pinkish tinge, occurring in compounds whose silicates afford important blue coloring substances for ceramics. Symbol: Co; atomic weight: 58.933; atomic number: 27; specific gravity: 8.9 at 20°C. |
| Dictionary.com Unabridged (v 1.1) Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006. |
Cobalt
To learn more about Cobalt visit Britannica.com
| © 2008 Encyclopædia Britannica, Inc. |
| co·balt
Audio Help (kō'bôlt') Pronunciation Key
n. Symbol Co A hard, brittle metallic element, found associated with nickel, silver, lead, copper, and iron ores and resembling nickel and iron in appearance. It is used chiefly for magnetic alloys, high-temperature alloys, and in the form of its salts for blue glass and ceramic pigments. Atomic number 27; atomic weight 58.9332; melting point 1,495°C; boiling point 2,900°C; specific gravity 8.9; valence 2, 3. See Table at element. [German Kobalt, from Middle High German kobolt, variant of kobold, goblin (from silver miners' belief that cobalt had been placed by goblins who had stolen the silver).] |
| The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2006 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. |
cobalt
1683, from Ger. kobold "goblin," Harz Mountains silver miners' term for rock laced with arsenic and sulphur (so called because it made them ill), from M.H.G. kobe "hut, shed" + *holt "goblin," from hold "gracious, friendly," complimentary words used to avoid the wrath of troublesome beings. The metal was extracted from this rock. It was known to Paracelsus, but discovery is usually credited to Brandt (1733). Extended to a blue color 1835.
| Online Etymology Dictionary, © 2001 Douglas Harper |
| cobalt | |
noun | |
| a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition |
| WordNet® 3.0, © 2006 by Princeton University. |
cobalt [ˈkəuboːlt] noun
a silver-white metal element with compounds that give a blue colouring
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| Kernerman English Multilingual Dictionary, © 2000-2006 K Dictionaries Ltd. |
| cobalt
Audio Help (kō'bôlt') Pronunciation Key
Symbol Co A silvery-white, hard, brittle metallic element that occurs widely in metal ores. It is used to make magnetic alloys, heat-resistant alloys, and blue pigment for ceramics and glass. Atomic number 27; atomic weight 58.9332; melting point 1,495°C; boiling point 2,900°C; specific gravity 8.9; valence 2, 3. See Periodic Table. |
| The American Heritage® Science Dictionary Copyright © 2002 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. |
Cobalt City, MO (village, FIPS 15220) Location: 37.54489 N, 90.28685 W
Population (1990): 254 (106 housing units)
Area: 0.4 sq km (land), 0.0 sq km (water)
| U.S. Gazetteer, U.S. Census Bureau |
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.| Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc. |
COBALT
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