manganese
A metallic element resembling and often associated, particularly in ores, with iron; atomic no. 25, atomic wt. 54.94; manganous salts are sometimes used in medicine. SYN: manganum. [Mod. L. manganesium, manganum, an altered form of magnesium]

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man·ga·nese 'maŋ-gə-.nēz, -.nēs n a grayish white usu. hard and brittle metallic element that resembles iron but is not magnetic symbol Mn see ELEMENT (table)

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n.
a greyish metallic element, the oxide of which, when inhaled by miners in underventilated mines, causes brain damage and symptoms very similar to those of parkinsonism. Minute quantities of the element are required by the body (see trace element). Symbol: Mn.

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man·ga·nese (Mn) (mangґgə-nēs) [L. manganum, manganesium] a metal resembling iron; atomic number 25, atomic weight 54.938, specific gravity 7.2. It occurs normally throughout the body, concentrated in the mitochondria, chiefly in the pituitary, liver, pancreas, kidney, and bone; it is necessary for the synthesis of mucopolysaccharides and activates a number of enzymes. Clinical deficiency is unknown in humans but may occur in other animals and causes perosis in poultry. Excessive inhalation of manganese dust can cause toxicity; see under poisoning and pneumonitis.

Medical dictionary. 2011.

Look at other dictionaries:

  • manganese(II) — manganese(II) …   English syllables

  • MANGANÈSE — Le manganèse (symbole Mn, numéro atomique 25) est un métal gris clair, brillant comme l’acier, avec des reflets rougeâtres. Il se situe en tête de la colonne VII A de la classification périodique et au centre de la série des éléments dits de… …   Encyclopédie Universelle

  • Manganese — Manganèse Pour les articles homonymes, voir Mn. Manganèse …   Wikipédia en Français

  • Manganese — Man ga*nese , n. [F. mangan[ e]se, It. manganese, sasso magnesio; prob. corrupted from L. magnes, because of its resemblance to the magnet. See {Magnet}, and cf. {Magnesia}.] (Chem.) An element obtained by reduction of its oxide, as a hard,… …   The Collaborative International Dictionary of English

  • manganese — Man ga*nese , n. [F. mangan[ e]se, It. manganese, sasso magnesio; prob. corrupted from L. magnes, because of its resemblance to the magnet. See {Magnet}, and cf. {Magnesia}.] (Chem.) An element obtained by reduction of its oxide, as a hard,… …   The Collaborative International Dictionary of English

  • manganese — 1670s as the name of a mineral, oxide of manganese, from Fr. manganèse (16c.), from It. manganese, alteration or corruption of M.L. magnesia (see MAGNESIA (Cf. magnesia)). From 1783 in English as the name of an element …   Etymology dictionary

  • manganésé — manganésé, ée (entrée créée par le supplément) (man ga né zé, zée) adj. En quoi on a fait pénétrer du manganèse. Un barreau d acier manganésé, Ac. des sc. Compt. rendus, t. LXXXIII, p. 816. •   La production des fontes manganésées, Journ. offic.… …   Dictionnaire de la Langue Française d'Émile Littré

  • manganese — [maŋ′gə nēs΄, maŋ′gənēz΄] n. [Fr manganèse < It manganese, by metathesis < ML magnesia: see MAGNESIA] a grayish white, metallic chemical element, usually hard and brittle, which rusts like iron but is not magnetic: it is used in the… …   English World dictionary

  • manganese — Symbol: Mn Atomic number: 25 Atomic weight: 54.938 Grey brittle metallic transition element. Rather electropositive, combines with some non metals when heated. Discovered in 1774 by Scheele …   Elements of periodic system

  • manganese — ► NOUN ▪ a hard grey metallic element used in special steels and magnetic alloys. ORIGIN Italian, alteration of magnesia …   English terms dictionary

  • Manganese — Not to be confused with Magnesium. This article is about the chemical element. For the ghost town, see Manganese, Minnesota. For the steamship, see SS Manganese. chromium ← manganese → iron ↑ Mn ↓ Tc …   Wikipedia

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