Definify.com
Webster 1913 Edition
Manganite
Man′ga-nite
,Noun.
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. 2.
(Chem.)
A compound of manganese dioxide with a metallic oxide; so called as though derived from the hypothetical manganous acid.