| manganite | 1. <chemical> One of the oxides of manganese; called also gray manganese ore. It occurs in brilliant steel-gray or iron-black crystals, also massive. 2. <chemistry> A compound of manganese dioxide with a metallic oxide; so called as though derived from the hypothetical manganous acid. Source: Websters Dictionary (01 Mar 1998) |
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| manganite | a black mineral consisting of basic manganese oxide |
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