cobalt

cobalt
A steel-gray metallic element, atomic no. 27, atomic wt. 58.93320; a bioelement and a constituent of vitamin B12; certain of its compounds are pigments, e.g., c. blue. [Ger. kobalt, goblin or evil spirit]
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Continuous Infusion vs Bolus Alteplase Trial; Continuous Infusion vs Double-Bolus Administration of Alteplase

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co·balt 'kō-.bȯlt n a tough lustrous silver-white magnetic metallic element that is related to and occurs with iron and nickel and is used esp. in alloys symbol Co see ELEMENT (table)

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n.
a metallic element. The artificial radioisotope cobalt-60, or radiocobalt, is a powerful emitter of gamma radiation and is used in the radiation treatment of cancer (see radiotherapy, teletherapy). Cobalt itself forms part of the vitamin B12 molecule. Symbol: Co.

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co·balt (Co) (koґbawlt) [L. cobaltum] a metal, atomic number 27, atomic weight 58.9332; the metal is used in magnetic alloys, and the compounds afford pigments; inhalation of the dust can cause cobaltosis and exposure to the powder may cause dermatitis. See also cobalt poisoning, under poisoning. In animals, a deficiency of this element leads to anemia and an excess of normal dietary requirements leads to erythrocytosis. In humans, although cobalt has been used with limited transient effectiveness to treat the anemia of infection and renal disease, its sole physiologic function is probably as a constituent of vitamin B12.

Medical dictionary. 2011.

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  • COBALT — Le cobalt (symbole Co, numéro atomique 27) est un métal placé sur la première ligne de la colonne VIII a, entre le fer et le nickel; il existe des analogies nombreuses entre cet élément, le rhodium et l’iridium. Le cobalt naturel, de masse… …   Encyclopédie Universelle

  • cobalt — COBÁLT s.n. Element chimic metalic foarte dur, alb argintiu, întrebuinţat la fabricarea unor oţeluri speciale, în radioterapie etc., iar sărurile sale la colorarea în albastru a obiectelor de sticlă, de porţelan etc. ♦ Vas, obiect de sticlă, de… …   Dicționar Român

  • 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 Collaborative International Dictionary of English

  • Cobalt — puede referirse a: Cobalt (Idaho) Cobalt (Misuri) Cobalt (Ontario) Chevrolet Cobalt, un modelo de automóvil. Cobalt Networks, una compañía de hardware de computadora. Palm OS Cobalt, versión 6.0 de Palm OS. Revista Cobalt, una revisa de novelas… …   Wikipedia Español

  • cobalt — Symbol: Co Atomic number: 27 Atomic weight: 58.993 Light grey transition element. Some meteorites contain small amounts of metallic cobalt. Generally alloyed for use. Mammals require small amounts of cobalt salts. Cobalt 60, an artificially… …   Elements of periodic system

  • cobalt 60 — sik stē n a heavy radioactive isotope of cobalt having the mass number 60 produced in nuclear reactors and used as a source of gamma rays esp. in place of radium (as in the treatment of cancer and in radiography) called also radiocobalt * * * a… …   Medical dictionary

  • Cobalt — Cobalt, MO U.S. village in Missouri Population (2000): 189 Housing Units (2000): 89 Land area (2000): 0.145300 sq. miles (0.376326 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.145300 sq. miles (0.376326 sq …   StarDict's U.S. Gazetteer Places

  • Cobalt, MO — U.S. village in Missouri Population (2000): 189 Housing Units (2000): 89 Land area (2000): 0.145300 sq. miles (0.376326 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.145300 sq. miles (0.376326 sq. km) FIPS… …   StarDict's U.S. Gazetteer Places

  • cobalt-60 — noun A radioactive isotope of cobalt used as a source of gamma rays, eg in radiotherapy • • • Main Entry: ↑cobalt …   Useful english dictionary

  • Cobalt 60 — is a Front 242 side project featuring Front 242 s Jean Luc de Meyer and Dominique Lallement. They are an electro industrial/EBM group, though they frequently use guitars, an uncommon feature among artists of the genre. Cobalt 60 has also done… …   Wikipedia

  • cobalt — ► NOUN ▪ a hard silvery white metallic chemical element with magnetic properties, used in alloys. ORIGIN German Kobalt imp, demon (from the belief that cobalt was harmful to the ores with which it occurred) …   English terms dictionary

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