manganese
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, grayish white metal, fusible with difficulty (melting point 1244[deg] C), but easily oxidized. Its ores occur abundantly in nature as the minerals pyrolusite, manganite, etc. Symbol Mn. Atomic number 25; Atomic weight 54.938 [C=12.011]. [1913 Webster +PJC]

Note: An alloy of manganese with iron (called ferromanganese) is used to increase the density and hardness of steel. [1913 Webster]

{Black oxide of manganese}, {Manganese dioxide} or {Manganese peroxide}, or {Black manganese} (Chem.), a heavy black powder {MnO2}, occurring native as the mineral pyrolusite, and valuable as a strong oxidizer; -- called also familiarly {manganese}. It colors glass violet, and is used as a decolorizer to remove the green tint of impure glass. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • 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 — 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

  • Manganèse — Pour les articles homonymes, voir Mn et Manganèse (homonymie). Manganèse …   Wikipédia en Français

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