Manganese

n.

1.

(Chem.) An element obtained by reduction of its oxide, as a hard, grayish white metal, fusible with difficulty (melting point 1244° C), but easily oxidized. Its ores occur abundantly in nature as the minerals pyrolusite, manganite, etc. Symbol Mn. Atomic number 25; Atomic weight 54.938 [C=12.011]. Black oxide of manganese (Chem.) a heavy black powder MnO2, occurring native as the mineral pyrolusite, and valuable as a strong oxidizer; - called also familiarly manganese. It colors glass violet, and is used as a decolorizer to remove the green tint of impure glass.

Noun

1.

manganese - a hard brittle gray polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals Synonyms: atomic number 25, Mn

atomic number 25, hausmannite, manganite, metal, metallic element, Mn, psilomelane, pyrolusite, rhodochrosite