Found 2 items, similar to manganite.
English → English (WordNet) Definition: manganite manganite n : a black mineral consisting of basic manganese oxide; a source of manganese
English → English (gcide) Definition: Manganite 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]