manganese

n. (Mn) grayish-white metallic element used in the manufacture of steel (Chemistry)

Manganese (IPA: ) is a chemical element that has the symbol Mn and atomic number 25. It is found as the free element in nature (often in combination with iron), and in many minerals. The free element is a metal with important industrial metal alloy uses. Manganese ions are variously colored, and are used industrially as pigments and as oxidation chemicals. Manganese (II) ions function as cofactors for a number of enzymes and the element is thus a required trace mineral for all known living organisms.
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Manganese /man·ga·nese/ a chemical element, at. no. 25; its salts occur in the body tissue in very small amounts and activate liver arginase and [more]Manganese - Community and Resources

Noun
1. a hard brittle gray polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals
(synonym) Mn, atomic number 25
(hypernym) metallic element, metal
(substance-holonym) hausmannite

n. manganese, grayish-white metallic element used in the manufacture of steel (Chemistry)