Thesaurus: pyrolusite

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1. n. Manganese dioxide, a mineral of an iron-black or dark steel-gray color and metallic luster, usually soft. Pyrolusite parts with its oxygen at a red heat, and is extensively used in discharging the brown and green tints of glass (whence its name).
2. n. a mineral consisting of manganese dioxide; an important source of manganese
3. Manganese dioxide, a mineral of an iron-black or dark steel- gray color and metallic luster, usually soft. Pyrolusite parts with its oxygen at a red heat, and is extensively used in discharging the brown and green tints of glass (whence its name).
4. Manganese dioxide, a mineral of an iron-black or dark steel-gray color and metallic luster, usually soft. Pyrolusite parts withits oxygen at a red heat, and is extensively used in discharging thebrown and green tints of glass (whence its name).
5. n a mineral consisting of manganese dioxide; an important source of manganese