Adjacent Words

Manganese definitions

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Webster's 1828 Dictionary

MAN'GANESE, n. A metal of a dusky white, or whitish gray color, very hard and difficult to fuse. It never occurs as a natural product in a metallic state. The substance usually so called is an oxyd of manganese, but not pure.

WordNet (r) 3.0 (2005)

n
1: a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals [syn: manganese, Mn, atomic number 25]

Merriam Webster's

noun Etymology: French manganèse, from Italian manganese manganese dioxide Date: 1783 a grayish-white usually hard and brittle metallic element that resembles iron but is not magnetic and is used especially in alloys, batteries, and plant fertilizers — see element table • manganesian adjective

Britannica Concise

Metallic chemical element, one of the transition elements, chemical symbol Mn, atomic number 25. It is a silvery white, hard, brittle metal, widely distributed in the earth's crust in combination with other elements. Nodules rich in manganese occur in huge quantities on the sea floor, but no economical way to exploit them has been devised. More than 95% of the manganese produced is used in iron and steel alloys and much of the rest in nonferrous aluminum and magnesium alloys, to improve their corrosion resistance and mechanical properties. Manganese compounds, in which it has various valences, are used in fertilizers and textile printing and as reagents and raw materials. Potassium permanganate is used for disinfecting, deodorizing, and bleaching and as a reagent in analysis. Manganese is essential to plants for growth and to higher animals to promote the action of many enzymes.

Dictionary of the Elements

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.

Oxford Reference Dictionary

n. 1 Chem. a grey brittle metallic transition element used with steel to make alloys. Usage: Symb.: Mn. 2 (in full manganese oxide) the black mineral oxide of this used in the manufacture of glass. Derivatives: manganic adj. manganous adj. Etymology: F manganèse f. It. manganese, alt. f. MAGNESIA

Webster's 1913 Dictionary

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, but easily oxidized. Its ores occur abundantly in nature as the minerals pyrolusite, manganite, etc. Symbol Mn. Atomic weight 54.8. Note: An alloy of manganese with iron (called ferromanganese) is used to increase the density and hardness of steel. Black oxide of manganese, Manganese dioxide or 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. Manganese bronze, an alloy made by adding from one to two per cent of manganese to the copper and zinc used in brass.

Webster's 1913 Dictionary

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, but easily oxidized. Its ores occur abundantly in nature as the minerals pyrolusite, manganite, etc. Symbol Mn. Atomic weight 54.8. Note: An alloy of manganese with iron (called ferromanganese) is used to increase the density and hardness of steel. Black oxide of manganese, Manganese dioxide or 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. Manganese bronze, an alloy made by adding from one to two per cent of manganese to the copper and zinc used in brass.

Collin's Cobuild Dictionary

Manganese is a greyish-white metal that is used in making steel.