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View synonyms for cobalt

cobalt

[ koh-bawlt ]

noun

  1. a silver-white metallic element with a faint pinkish tinge, occurring in compounds whose silicates afford important blue coloring substances for ceramics. : Co; : 58.933; : 27; : 8.9 at 20°C.


cobalt

/ ˈkəʊbɔːlt /

noun

  1. a brittle hard silvery-white element that is a ferromagnetic metal: occurs principally in cobaltite and smaltite and is widely used in alloys. The radioisotope cobalt-60 , with a half-life of 5.3 years, is used in radiotherapy and as a tracer. Symbol: Co; atomic no: 27; atomic wt: 58.93320; valency: 2 or 3; relative density: 8.9; melting pt: 1495°C; boiling pt: 2928°C


cobalt

/ bôlt′ /

  1. 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.


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Word History and Origins

Origin of cobalt1

1675–85; < German Kobalt, variant of Kobold kobold

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Word History and Origins

Origin of cobalt1

C17: German Kobalt, from Middle High German kobolt goblin; from the miners' belief that malicious goblins placed it in the silver ore

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Example Sentences

Ultimately Cobalt housed, at one point or another, nearly half of the 119 detainees identified by the report.

Ridha al-Najjar was the first to be held at detention site Cobalt.

Self-described 9/11 mastermind Khalid Sheikh Mohammed was also kept at Cobalt after his March 2003 in Pakistan.

In fact, four of 20 cells at Cobalt were found to have bars across the cell to allow this.

In Aug. 2003, Muller said he believed Cobalt was merely a holding facility.

Three are mentioned by Cennino—indigo, a cobalt, and ultramarine.

Our scientists say the gases of the comet in some unexplained way altered the iron in the hmoglobin of our blood to cobalt.

Then he did his job: he pressed a button which released two shards of fire metal in a housing of cobalt.

The ore of cobalt, called zaffre, is found in several parts of Europe, but chiefly in Saxony.

The calx of cobalt is of a deep blue colour, which, when fused, makes the blue glass called smalt.

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cobalamincobalt 60