a salt of manganic acid
[mang-guh-nees, -neez] /ˈmæŋ gəˌnis, -ˌniz/ noun, Chemistry. 1. a hard, brittle, grayish-white, metallic element, an oxide of which, MnO 2 (manganese dioxide) is a valuable oxidizing agent: used chiefly as an alloying agent in steel to give it toughness. Symbol: Mn; atomic weight: 54.938; atomic number: 25; specific gravity: 7.2 at 20°C. /ˈmæŋɡəˌniːz/ noun 1. […]
noun 1. an alloy that is about 55 percent copper, 40 percent zinc, and up to 3.5 percent manganese. noun 1. any of various alloys containing copper (55–60 per cent), zinc (35–42 per cent), and manganese (about 3.5 per cent)
- Manganese nodule
noun 1. (geology) a small irregular concretion found on deep ocean floors having high concentrations of certain metals, esp manganese
noun 1. Mineralogy. rhodonite or rhodochrosite.