Definitions

from The American Heritage® Dictionary of the English Language, 4th 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A chemical element (symbol Co) with an atomic number of 27.
  • n. Cobalt blue.

from the GNU version of the Collaborative International Dictionary of English

  • n. 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.

from The 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.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition

Etymologies

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)
From German Kobold ("goblin"). (Wiktionary)

Examples

  • 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).

    What’s In A Name?

  • Like the plate, the walls were trimmed in cobalt blue and painted a dusty gold.

    Three Tamales for the Señor Part One

  • 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.

    Roman Times, Israeli Times

  • 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.

    The Creation of Color in Eighteenth-Century Europe

  • 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 Creation of Color in Eighteenth-Century Europe

  • The mineral which contains cobalt is arsenide, known as smaltite.

    Cobalt Mineral Conditions

  • BMO analysts said they remain comfortable with their short-term cobalt forecast of

    Mineweb - Daily news headlines

  • BMO maintained its long-term cobalt price forecast of $8 / lb.

    Mineweb - Daily news headlines

  • 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.

    Aspen Times - Top Stories

  • This worked a lot better than the plain cobalt stains that I’ve used in the past.

    Kater’s Art » Blog Archive » Fish Tray

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