Noah Webster Dictionary (1913 edition): Manganite
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Noah Webster Dictionary (1913 edition): Manganite
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(1):
(n.) One of the oxides of manganese; -- called also gray manganese ore. It occurs in brilliant steel-gray or iron-black crystals, also massive.
(2):
(n.) A compound of manganese dioxide with a metallic oxide; so called as though derived from the hypothetical manganous acid.