Manganese
WordNet
noun
(1) A hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals
WiktionaryText
Etymology
manganèse, from manganese, by alteration from magnesia, magnesia, from Ancient Greek μαγνησία (magnēsia), after Μαγνησία (Magnēsia), Magnesia
Noun
- A metallic chemical element (symbol Mn) with an atomic number of 25.