manganite Meaning, Definition & Usage
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noun a black mineral consisting of basic manganese oxide; a source of manganese
WordNet
Man"ga*nite noun
Definitions
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(Min.) One of the oxides of manganese; -- called also gray manganese ore . It occurs in brilliant steel-gray or iron-black crystals, also massive. -
(Chem.) A compound of manganese dioxide with a metallic oxide; so called as though derived from the hypothetical manganous acid.