gray manganese ore
Manganite Man"ga*nite, n. 1. (Min.) One of the oxides of manganese; -- called also {gray manganese ore}. It occurs in brilliant steel-gray or iron-black crystals, also massive. [1913 Webster]

2. (Chem.) A compound of manganese dioxide with a metallic oxide; so called as though derived from the hypothetical manganous acid. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • Red manganese — Red Red, a. [Compar. {Redder} ( d?r); superl. {Reddest}.] [OE. red, reed, AS. re[ a]d, re[ o]d; akin to OS. r[=o]d, OFries. r[=a]d, D. rood, G. roht, rot, OHG. r[=o]t, Dan. & Sw. r[ o]d, Icel. rau[eth]r, rj[=o][eth]r, Goth. r[ a]uds, W. rhudd,… …   The Collaborative International Dictionary of English

  • Red-lead ore — Red Red, a. [Compar. {Redder} ( d?r); superl. {Reddest}.] [OE. red, reed, AS. re[ a]d, re[ o]d; akin to OS. r[=o]d, OFries. r[=a]d, D. rood, G. roht, rot, OHG. r[=o]t, Dan. & Sw. r[ o]d, Icel. rau[eth]r, rj[=o][eth]r, Goth. r[ a]uds, W. rhudd,… …   The Collaborative International Dictionary of English

  • manganite — /mang geuh nuyt /, n. 1. a gray to black mineral, hydrous manganese oxide, MnO(OH); gray manganese ore. 2. Chem. any of a series of salts containing tetravalent manganese and derived from either of two acids, H4MnO4 or H2MnO3. [1820 30;… …   Universalium

  • Manganite — Man ga*nite, n. 1. (Min.) One of the oxides of manganese; called also {gray manganese ore}. It occurs in brilliant steel gray or iron black crystals, also massive. [1913 Webster] 2. (Chem.) A compound of manganese dioxide with a metallic oxide;… …   The Collaborative International Dictionary of English

  • manganite — man•ga•nite [[t]ˈmæŋ gəˌnaɪt[/t]] n. 1) mir a gray to black mineral, hydrous manganese oxide, MnO(OH); gray manganese ore 2) chem. any of a series of salts containing tetravalent manganese and derived from either of two acids, H4MnO4 or H2MnO3 •… …   From formal English to slang

  • Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry       The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …   Universalium

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