What does cobalt mean?

Definitions for cobalt
ˈkoʊ bɔltcobalt

This dictionary definitions page includes all the possible meanings, example usage and translations of the word cobalt.

Princeton's WordNet

  1. cobalt, Co, atomic number 27noun

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


  1. cobaltnoun

    A chemical element (symbol Co) with an atomic number of 27.

  2. cobaltnoun

    Cobalt blue.

  3. Etymology: From Kobold.

Samuel Johnson's Dictionary

  1. Cobaltnoun

    A marcasite frequent in Saxony.

    Cobalt is plentifully impregnated with arsenick; contains copper and some silver. Being sublimed, the flores are of a blue colour: these German mineralists call zaffir. John Woodward.

    Cobalt is a dense, compact, and ponderous mineral, very bright and shining, and much resembling some of the antimonial ores. It is found in Germany, Saxony, Bohemia, and England; but ours is a poor kind. From cobalt are produced the three sorts of arsenick, white, yellow, and red; as also zaffre and smalt. John Hill, on Fossils.


  1. Cobalt

    Cobalt is a chemical element with the symbol Co and atomic number 27. As with nickel, cobalt is found in the Earth's crust only in a chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Cobalt-based blue pigments (cobalt blue) have been used since ancient times for jewelry and paints, and to impart a distinctive blue tint to glass, but the color was for a long time thought to be due to the known metal bismuth. Miners had long used the name kobold ore (German for goblin ore) for some of the blue-pigment-producing minerals; they were so named because they were poor in known metals, and gave poisonous arsenic-containing fumes when smelted. In 1735, such ores were found to be reducible to a new metal (the first discovered since ancient times), and this was ultimately named for the kobold. Today, some cobalt is produced specifically from one of a number of metallic-lustered ores, such as cobaltite (CoAsS). The element is, however, more usually produced as a by-product of copper and nickel mining. The Copperbelt in the Democratic Republic of the Congo (DRC) and Zambia yields most of the global cobalt production. World production in 2016 was 116,000 tonnes (114,000 long tons; 128,000 short tons) (according to Natural Resources Canada), and the DRC alone accounted for more than 50%.Cobalt is primarily used in lithium-ion batteries, and in the manufacture of magnetic, wear-resistant and high-strength alloys. The compounds cobalt silicate and cobalt(II) aluminate (CoAl2O4, cobalt blue) give a distinctive deep blue color to glass, ceramics, inks, paints and varnishes. Cobalt occurs naturally as only one stable isotope, cobalt-59. Cobalt-60 is a commercially important radioisotope, used as a radioactive tracer and for the production of high-energy gamma rays. Cobalt is the active center of a group of coenzymes called cobalamins. Vitamin B12, the best-known example of the type, is an essential vitamin for all animals. Cobalt in inorganic form is also a micronutrient for bacteria, algae, and fungi.


  1. cobalt

    Cobalt is a chemical element with the symbol Co and atomic number 27. It is a hard, lustrous, silver-grey metal that is found in various minerals, typically in combination with other elements. Cobalt is used in the creation of magnetic, high-strength alloys and is a key ingredient in rechargeable batteries. It is also used in the production of catalysts and in the creation of pigments due to its ability to produce a distinct blue color.

Webster Dictionary

  1. Cobaltnoun

    a tough, lustrous, reddish white metal of the iron group, not easily fusible, and somewhat magnetic. Atomic weight 59.1. Symbol Co

  2. Cobaltnoun

    a commercial name of a crude arsenic used as fly poison

  3. Etymology: [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. Cobalt

    Cobalt is a town in the district of Timiskaming, province of Ontario, Canada, with a population of 1,133 In 2001 Cobalt was named "Ontario's Most Historic Town" by a panel of judges on the TV Ontario program Studio 2, and in 2002 the area was designated a National Historic Site.

Chambers 20th Century Dictionary

  1. Cobalt

    kō′bawlt, n. a metal the ores of which are sparingly distributed—in the metallic state found in meteoric stones or aerolites, generally occurring combined with arsenic: a blue pigment, prepared from the foregoing—also Cō′balt-blue.—adj. of this deep-blue colour.—adjs. Cobalt′ic; Cobaltif′erous.—n. Cō′baltite, a sulpharsenide of cobalt. [Ger. kobalt, from kobold, a demon, a nickname given by the German miners, because they supposed it to be a mischievous and hurtful metal.]

U.S. National Library of Medicine

  1. Cobalt

    A trace element that is a component of vitamin B12. It has the atomic symbol Co, atomic number 27, and atomic weight 58.93. It is used in nuclear weapons, alloys, and pigments. Deficiency in animals leads to anemia; its excess in humans can lead to erythrocytosis.

Editors Contribution

  1. cobalt

    An element with a known symbol and atomic number.

    At present in 2015 that we know about the copper belt in the Democratic Republic of the Congo and Zambia yields most of the cobalt mined worldwide.

    Submitted by anonymous on November 15, 2015  

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  1. Chaldean Numerology

    The numerical value of cobalt in Chaldean Numerology is: 2

  2. Pythagorean Numerology

    The numerical value of cobalt in Pythagorean Numerology is: 8

Examples of cobalt in a Sentence

  1. Jennifer Wilcox:

    Since we get fossil fuels from the earth, there's a lot of other components other than just the carbons, there's critical minerals like cobalt and nickel, and there's also rare earth elements.

  2. Eugene Gholz:

    F-35s won't fall out of the sky because we don't have access to cobalt imports, it's not like you need to constantly deliver diesel to the forward operating base. Once the base has a battery, it's got a battery for years.

  3. Bruce Campbell:

    Alright you Primitive Screwheads, listen up! You see this? This... is my boomstick! The twelve-gauge double-barreled Remington. S-Mart's top of the line. You can find this in the sporting goods department. That's right, this sweet baby was made in Grand Rapids, Michigan. Retails for about a hundred and nine, ninety five. It's got a walnut stock, cobalt blue steel, and a hair trigger. That's right. Shop smart. Shop S-Mart. You got that?

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"cobalt." Definitions.net. STANDS4 LLC, 2024. Web. 14 Jun 2024. <https://www.definitions.net/definition/cobalt>.

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    a sharp hand gesture (resembling a blow)
    A dint
    B recital
    C muddle
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