American Heritage® Dictionary of the English Language, Fourth Edition
- n. 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.
Century Dictionary and Cyclopedia
- n. Chemical symbol, Co; atomic weight, 58.8. A metal of a steel-gray color and a specific gravity variously given at from 8.52 to 8.95. It closely resembles nickel, the atomic weights of the two metals being the same, and their specific gravities nearly or quite the same. They have also very nearly the same ductility and tenacity, are almost always found in intimate association, and have in many respects a marked resemblance to iron, but are less fusible than that metal, and much less magnetic. Cobalt might be, and is to a very small extent, used for the same purposes for which nickel is used, especially for plating the surface of iron; but it is much rarer than nickel, is procured with more difficulty in the metallic form, and is consequently a dearer metal. The most important ores of cobalt are cobaltite, smaltite, and linnæite. (See these words.) Cobalt ores occur in a considerable number of localities, but nowhere in large quantity. The chief supply of the cobalt preparations comes from Saxony, Bohemia, Hesse, and Norway. The principal value of cohalt in the arts is due to the fact that its protoxid furnishes an intense and beautiful blue color, of importance in painting, and especially in the decoration of porcelain and glass. (See
smaltand zaffre.) Also spelled kobalt.
GNU Webster's 1913
- n. (Chem.) A tough, lustrous, reddish white metal of the iron group, not easily fusible, and somewhat magnetic. Atomic weight 59.1. Symbol Co.
- n. A commercial name of a crude arsenic used as fly poison.
- n. a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition
- From German Kobold ("goblin"). (Wiktionary)
- 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). (American Heritage® Dictionary of the English Language, Fourth Edition)
“In sixth grade, I started my own class newspaper, which my friends and I typed laboriously on the old fashionedmimeographsheets (the kind with the blue backing which left those same stubby fingers smudged in cobalt ink).”
“Like the plate, the walls were trimmed in cobalt blue and painted a dusty gold.”
“But if a few kilos of plutonium wrapped in cobalt finds its way to Mecca as the nursery schools of Tel Aviv are turned into Beslan *, I am sure there would be a little relief, perhaps some joy in the new Washington I visualize here, and perhaps in Berlin, too.”
“Raw cobalt is a silvery gray or whitish color often resembling silver, compact and heavy, as Caspar Neumann described it. 19 John Hill noted other general characteristics of the "genus" cobalt: fine, brittle, not fusible.”
“Zaffer, an oxide of cobalt, is the name given to the blue glass formed when cobalt is mixed with potash and sand, ground flints or other frits.”
“The mineral which contains cobalt is arsenide, known as smaltite.”
“BMO analysts said they remain comfortable with their short-term cobalt forecast of”
“BMO maintained its long-term cobalt price forecast of $8 / lb.”
“And it is not a jumble of various blues, of powders and navys and midnights; all the objects stick close to the tone known as cobalt - bright and intense.”
“This worked a lot better than the plain cobalt stains that I’ve used in the past.”
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Always my favorite color, and it comes in so many shades.
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Looking for tweets for cobalt.