'Manganite' definitions:
Definition of 'manganite'
(from WordNet)
noun
A black mineral consisting of basic manganese oxide; a source of manganese
Definition of 'Manganite'
From: GCIDE
- 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]